CN103926277A - Carbon monoxide sensor and carbon monoxide sensor electrode production method - Google Patents
Carbon monoxide sensor and carbon monoxide sensor electrode production method Download PDFInfo
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- CN103926277A CN103926277A CN201310010273.XA CN201310010273A CN103926277A CN 103926277 A CN103926277 A CN 103926277A CN 201310010273 A CN201310010273 A CN 201310010273A CN 103926277 A CN103926277 A CN 103926277A
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Abstract
The present invention discloses a carbon monoxide sensor and a carbon monoxide sensor electrode production method. The carbon monoxide sensor comprises a housing, a work electrode, a counter electrode, a reference electrode and an acid electrolyte, wherein the work electrode, the counter electrode, the reference electrode and the acid electrolyte are arranged inside the housing, the work electrode, the counter electrode and the reference electrode contact the acid electrolyte, and the work electrode, the counter electrode and the reference electrode respectively comprise a waterproof air permeability film and a noble metal catalyst layer arranged on the waterproof air permeability film. According to the present invention, according to the carbon monoxide sensor, the selective carbon monoxide electrode is adopted as the work electrode to achieve the purpose of selective carbon monoxide detection, the response time of the sensor on the carbon monoxide is shortened by about 30%, the absorption layer is not required to be arranged, and characteristics of simple structure, easy installation, rapid response, stable and reliable performance and the like are provided; and with the electrode preparation method, the noble metal consumption can be substantially reduced, and the cost is easily reduced.
Description
Technical field
The present invention relates to the gas sensor based on electrochemical principle, relate in particular to the method for making of a kind of carbon monoxide transducer and electrode thereof.
Background technology
Carbon monoxide (CO) gas is extensively present in daily productive life, and a large amount of CO poisonings all can occur in worldwide every year, is commonly called as gas poisoning.Because CO is colorless and odorless gas, be difficult for being discovered by people, human and animal is had to height toxicity.CO is combined with haemoglobin after entering blood by breathing, forms carbonyl hemoglobin, thereby makes human body anoxia be subject to major injury.In the CO that is 1600ppm in volume fraction, treat will make for 20 minutes people to feel headache, dizziness, will be dead after 1 hour.Therefore, it is the important means that prevents that CO is poisoning that CO alarm is installed, and CO sensor is directly determining the performance of whole alarm as the core component of whole alarm.
To adopt electrochemical gas sensor to the conventional method of the detection of CO gas.Mostly the electrochemical gas sensor using is at present using noble metal catalyst as active component, noble metal has certain wide spectrum catalytic performance, namely at normal temperatures can be oxidized or the gas of reduction can on noble metal catalyst, there is chemical reaction and detect.Although this has just caused electrochemical gas sensor to have certain selectivity, the phenomenon that selectivity is not high.With regard to the detection of CO gas, the interference of the gas such as the hydrogen that often can be subject to existing in environment, sulphuric dioxide, sulfuretted hydrogen, alcohol.Taking alcohol as example, disturb and can reach 110% as the intersection of electrochemical gas sensor alcohol in the time detecting carbon monoxide of catalyzer with noble metal platinum.
In order to solve above-mentioned interference problem, in industry, generally adopt at present the mode of adding physics filtering layer in gas sensor to eliminate the impact of interference gas, conventional is the interference of eliminating the gases such as alcohol by the suction-operated of activated charcoal.But there are three defects in the method: the one, because the impact of the factors such as gas molecule polarity and size makes activated charcoal can not eliminate the impact of common interference gas completely; The 2nd, any adsorbent has saturated extent of adsorption, even without the adsorbance that reaches capacity, adsorption area available on adsorbent also can have a certain impact to eliminating the effect of disturbing, this has just determined that in the impact of whole electrochemical sensor interference gas in serviceable life process be not changeless, can cause and detect inaccurate phenomenon; The 3rd, add gas after physics filtering layer and before arriving detecting unit will be have first so just extended gas by physical filtering layer and arrive path that detecting unit need to pass through and required time, cause the prolongation of sensor to the gas response time, taking city company 7 series sensor as example, add the response time of the 7E/F carbon monoxide transducer of physical filtering layer and compared long 20% left and right of response time without the 7E series of filtering layer.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of selectivity that realizes to detect the carbon monoxide transducer of carbon monoxide and the method for making of electrode thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of carbon monoxide transducer is provided, comprise housing, be arranged at working electrode in described housing, to electrode, contrast electrode and acidic electrolysis bath, described working electrode, electrode and contrast electrode are all contacted with acidic electrolysis bath, described working electrode, electrode and contrast electrode are included waterproof ventilated membrane and be located at the noble metal catalyst layer on described waterproof ventilated membrane.
Described working electrode is selectivity carbon monoxide electrode.
Described housing comprises base and is covered on the lid on it, described working electrode, electrode, contrast electrode and acidic electrolysis bath is all contained between described base and lid; On described base, be connected with corresponding described working electrode respectively, contact conductor to electrode and contrast electrode; Described electrode, contrast electrode and working electrode below are respectively equipped with to electrode diaphragm, described electrode, contrast electrode are connected with described corresponding contact conductor by corresponding electrode diaphragm with working electrode.
Between described base and lid, be also provided with pole cup, described acidic electrolysis bath is loaded in described pole cup; Described to electrode, contrast electrode and working electrode respectively with its noble metal catalyst layer down, be set in turn on described pole cup by back up pad.
Described lid is provided with gas regulation film to regulate the gas content that enters described housing; Between described working electrode and upper cover, be provided with O type packing ring.
Described acidic electrolysis bath is the acidic electrolysis bath of sulfuric acid or phosphoric acid, and wherein the content of sulfuric acid or phosphoric acid is 10 ~ 90%;
Described waterproof ventilated membrane is polytetrafluoroethylene (PTFE), gathered one or more the combination in fluorothene (PVDF), teflon/hexafluoroethylene multipolymer (PFEP), teflon/perfluor the third vinyl ether copolymers (PFA), tygon/TFE copolymer (PFTFE), silicon rubber (SR) and silicon fluoride rubber (FSR); In described noble metal catalyst layer, bullion content is 10 ~ 90wt%, and noble metal is as active component, and it is one or more in platinum (Pt), ruthenium (Ru), palladium (Pd), gold (Au), iridium (Ir), rhodium (Rh) and silver (Ag).
In described noble metal catalyst layer, described noble metal is supported on conductive carbon particle, and described conductive carbon is carbon black, carbon nano-tube or activated charcoal.
Described working electrode, identical or different to the active component in the noble metal catalyst layer of electrode and contrast electrode.
The present invention also provides a kind of method for making of electrode of carbon monoxide transducer, comprises the following steps:
(1), noble metal catalyst powder be placed in to appropriate spreading agent fully disperse, obtain suspension;
(2), in described suspension, add appropriate hydrophober, fully mix, obtain mixed liquor;
(3), described mixed liquor is formed to bulk adherent coatings in lower stirring of heating;
(4), described adherent coatings is evenly coated on hydrophobic carbon paper;
(5), utilize the adherent coatings that is coated with on hydrophobic carbon paper by together with described hydrophobic carbon paper and waterproof ventilated membrane compacting bonding, make electrode, the noble metal catalyst layer of described hydrophobic carbon paper and the adherent coatings formation electrode being coated with it on;
Described electrode comprises working electrode, to electrode and contrast electrode.
Also comprise (6), by the electrode obtained thermal treatment under vacuum state, the impurity being brought to remove hydrophober.
Carbon monoxide transducer of the present invention, be working electrode by using selectivity carbon monoxide electrode, realize the object of selectivity detection carbon monoxide, described sensor is shortened to 30% left and right to the response time of carbon monoxide, without adsorbed layer is set, have simple in structure, easy for installation, respond the features such as rapid and stable and reliable for performance; The preparation method of electrode of the present invention, can greatly reduce the consumption of noble metal, favourable reducing costs.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the decomposition texture schematic diagram of carbon monoxide transducer of the present invention;
Fig. 2 is the unitized construction schematic diagram of carbon monoxide transducer shown in Fig. 1;
Fig. 3 is the schematic diagram while adopting bitubular roll squeezer to prepare electrode in the present invention;
Fig. 4 is the response curve of carbon monoxide transducer to 500PPM carbon monoxide and 500PPM alcohol gas while using working electrode prepared by broad spectrum activity noble metal catalyst;
Fig. 5 is the response curve of carbon monoxide transducer to 500PPM carbon monoxide and 500PPM alcohol gas while using selectivity carbon monoxide electrode for working electrode.
Embodiment
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figures 1 and 2, carbon monoxide transducer of the present invention, comprise housing 10, be arranged at working electrode 20 in housing 10, contrast electrode 30, to electrode 40 and acidic electrolysis bath (not shown), working electrode 20, contrast electrode 30 and electrode 40 is all contacted with acidic electrolysis bath.
Housing 10 plays structure and protective effect physically in whole sensor; it can adopt the engineering plastics such as acrylonitrile-butadiene-styrene (ABS) plastics (ABS), polypropylene (PP) or polyamide, polyoxymethylene or makrolon material to make, and described material has certain toughness and intensity.Housing 10 can comprise base 11 and be covered on the lid 12 on it, and lid 12 is connected and forms the housing 10 of sealing with base 11, working electrode 20, electrode 40, contrast electrode 30 and acidic electrolysis bath is all contained between base 11 and lid 12.On base 11, be connected with corresponding working electrode 20 respectively, contact conductor to electrode 40 and contrast electrode 30, be respectively working electrode lead-in wire, to contact conductor and contrast electrode lead-in wire.Be provided with pin 21,41,31 power pole wire bonds at the corresponding each contact conductor of base 11.Lid 12 is provided with gas regulation film (not shown) to regulate the gas content that enters housing 10, can also protect acidic electrolysis bath to avoid environmental change impact simultaneously.
Between base 11 and lid 12, be also provided with pole cup 50, for storing acidic electrolysis bath, and certain space be provided to the acidic electrolysis bath volume change causing due to temperature variation, prevent acidic electrolysis bath expansion seepage.Pole cup 50 is provided with through hole 51 for the injection of acidic electrolysis baths wherein, base 11 the be provided with hole portion 110,120 that can with through hole 51 be communicated with corresponding to lid 12.
Working electrode 20, to electrode 40 and contrast electrode 30 as the core of whole sensor, for redox reaction occurs, the carbon monoxide gas body burden in environment is directly changed into the signal that can detect.This working electrode 20, electrode 40 and contrast electrode 30 are included waterproof ventilated membrane and be located at the noble metal catalyst layer on waterproof ventilated membrane.Be set in turn in pole cup 50 tops by back up pad 60 to electrode 40, contrast electrode 30 and working electrode 20 respectively with its noble metal catalyst layer down.Wherein, electrode 40, contrast electrode 30 are respectively equipped with to electrode diaphragm 42,32,22 with working electrode 20 belows, electrode 40, contrast electrode 30 are connected with corresponding contact conductor by corresponding electrode diaphragm 42,32,22 with working electrode 20.Between working electrode 20 and upper cover 12, be further provided with O type packing ring 70, can prevent direct contact the between working electrode 20 and upper cover 12, can also provide certain gas collection region for the gas (as carbon monoxide) entering in housing 10.
Described waterproof ventilated membrane is polytetrafluoroethylene (PTFE), gathered one or more the combination in fluorothene (PVDF), teflon/hexafluoroethylene multipolymer (PFEP), teflon/perfluor the third vinyl ether copolymers (PFA), tygon/TFE copolymer (PFTFE), silicon rubber (SR) and silicon fluoride rubber (FSR).In noble metal catalyst layer, noble metal is as active component, content is 10 ~ 90%, and noble metal can be one or more in platinum (Pt), ruthenium (Ru), palladium (Pd), gold (Au), iridium (Ir), rhodium (Rh) and silver (Ag), can be simple substance and also can be the alloy of multiple noble metal.Can be identical or different to the active component (being noble metal) in the noble metal catalyst layer of electrode 40, contrast electrode 30 and working electrode 20.Optionally detect carbon monoxide in order to realize, working electrode 20, to adopting different noble metals in the noble metal catalyst layer of electrode 40 and contrast electrode 30, wherein working electrode 20 is selectivity carbon monoxide electrode, noble metal in its noble metal catalyst layer adopts one or more in platinum (Pt), ruthenium (Ru), palladium (Pd), gold (Au), iridium (Ir), rhodium (Rh) and silver (Ag), and wherein the content of rhodium is 10 ~ 90%; The porous gas diffusive electrode that is broad spectrum activity to electrode 40 and contrast electrode 30, noble metal in its noble metal catalyst layer adopts one or more in platinum (Pt), ruthenium (Ru), palladium (Pd), gold (Au), iridium (Ir), rhodium (Rh) and silver (Ag) equally, and wherein the content of platinum is 10 ~ 90%.
In noble metal catalyst, noble metal can directly be incorporated into wherein by its powder morphology, also can support on conductive carbon particle (carbon carrier) by its powder morphology, form carbon supported noble metal catalyst, the two can reach identical catalytic performance, the mode that preferably adopts noble metal powder to support on conductive carbon particle forms noble metal catalyst layer, this mode can make noble metal powder be distributed to equably on the active surface of whole conductive carbon particle, thereby can greatly reduce the consumption of noble metal powder, favourable reducing costs.Described conductive carbon particle adopts carbon black, carbon nano-tube or activated charcoal etc. to have the material of high-specific surface area.
Described acidic electrolysis bath mainly plays protolysis, can be the acidic electrolysis bath under specified temp with specified moisture value of sulfuric acid or phosphoric acid etc., and wherein the content of sulfuric acid or phosphoric acid is 10 ~ 90%.In the present embodiment, acidic electrolysis bath dress exists in pole cup 50 and is placed in housing 10.
Shown in figure 1, when the present invention assembles, first three pins 21,41,31 on base 11 burn-on respectively working electrode lead-in wire, to contact conductor and contrast electrode lead-in wire, pole cup 50 is placed on base 11 by assigned direction, then places back up pad 60; One electrode diaphragm 42 is placed in back up pad 60, will be connected on this electrode diaphragm 42 contact conductor, will be to electrode 40 with its noble metal catalyst layer towards contact conductor being placed on this electrode diaphragm 42; Then on to electrode 40, place again an electrode diaphragm 32, contrast electrode lead-in wire is connected on this electrode diaphragm 32, contrast electrode 30 is placed on this electrode diaphragm 32 towards contrast electrode lead-in wire with its precious metal catalyst layer; In kind place working electrode 20 in contrast electrode 30 tops again, thereby electrode 40, contrast electrode 30 and working electrode 20 are placed on to back up pad 60 tops successively; Finally on working electrode 20, place O type packing ring 70, cover lid 12, base 11 and the hole portion 110,120 of lid 12 and the through hole 51 of pole cup 50 are just to being communicated with, by the hole that is communicated with toward the acidic electrolysis bath that injects certain volume in pole cup 50, the mode that adopts again hot melt by through hole 51 or and hole portion 110,120 seal, thereby be assembled into overall carbon monoxide transducer.
Working electrode 20 described in the present invention, electrode 40 and contrast electrode 30 all can be adopted with the following method and be made, said method comprising the steps of:
(1), noble metal catalyst powder be placed in to appropriate spreading agent fully disperse, obtain suspension.
Spreading agent comprises isopropyl alcohol, also can comprise one or more combinations in water, methyl alcohol, ethanol equal solvent, and wherein the content of isopropyl alcohol is greater than 50%, and the content of water is less than 50%.The mass ratio of spreading agent and noble metal catalyst is 1:15 ~ 1:50.Process for dispersing can be the conventional point process for dispersing such as mechanical raking, sonic oscillation, and the temperature of dispersion is room temperature.
(2), in suspension, add appropriate hydrophober, fully mix, obtain mixed liquor.
It is 20 ~ 60wt% that hydrophober can be PTFE content, and PTFE particle diameter is the PTFE emulsion of 0.02 ~ 1 micron, the PTFE30 emulsion that typically has E.I.Du Pont Company to produce.In gained mixed liquor, the mass ratio of PTFE and noble metal catalyst is 1:1 ~ 1:10.
(3), mixed liquor is formed to bulk adherent coatings in lower stirring of heating.
Mixed liquor is reunited adding under thermal agitation, is formed for the bulk coating of catalyzer/hydrophober of coating, is described adherent coatings.Heating-up temperature is 80 ~ 130 DEG C, and the time is 5 ~ 20 minutes.
(4), adherent coatings is evenly coated on hydrophobic carbon paper.
Wherein, hydrophobic carbon paper mainly adopts carbon fibre or graphitized fibre to make, and it is 50 ~ 200g/m that hydrophobic carbon paper can adopt weight per unit area
2, bulk density is 0.2 ~ 0.6g/cm
3porosity is 20 ~ 80%, interface resistance is less than 1 ohmcm, aspect resistance is less than the carbon paper of 0.1 ohmcm, in this hydrophobic carbon paper, hydrophober content is 5% ~ 85%, and hydrophober can be in the fluorinated polymers such as the multipolymer of teflon, Kynoar, PEP one or more combination.Coating method can adopt the mode of blade coating, and the thickness of controlling adherent coatings is 0.2～1mm, and on every square centimeter of carbon paper, the consumption of catalyzer is 0.5 ~ 3mg.
(5), utilize the adherent coatings that is coated with on hydrophobic carbon paper by together with hydrophobic carbon paper and waterproof ventilated membrane compacting bonding, make electrode.
Hydrophobic carbon paper is coated with to one of adherent coatings and faces down and be placed on waterproof ventilated membrane, and method is bonded together the two by adopting roll-in or roll etc., the pressure applying is 1 ~ 15N/cm
2, the time of exerting pressure is 2 ~ 10 minutes.
Also comprise (6), by the electrode obtained thermal treatment under vacuum state, the impurity being brought to remove hydrophober.In this step, can adopt vacuum drying oven to carry out, heating-up temperature is 50 ~ 180 DEG C, and the heat time is 0.5 ~ 3 hour.
The electrode making by said method, its noble metal catalyst layer is smooth evenly, free from flaw, bonding firmly and respond goodly, can be directly used in assembling carbon monoxide transducer.
As shown in Figure 3, can adopt bitubular roll squeezer 100 to prepare electrode of the present invention, wherein the gap between roller 101 and roller 102 is adjustable, so that processing the electrode support 120(of different-thickness is hydrophobic carbon paper), in gap, put into after electrode, the torsional moment 103 of roll squeezer roller 101,102 is controlled at 0 ~ 4NM, and adherent coatings layer 130 does not directly contact with roller 101, but passes through waterproof ventilated membrane 140 between roller 101,102.Roll-in by roller 101,102 is bonded together the hydrophobic carbon paper 120 that is coated with adherent coatings 130 with waterproof ventilated membrane 140 compactings.
Prepare by the following method the porous gas diffusive electrode using in carbon monoxide transducer:
The noble metal catalyst powder that the platinum content that 135mg is made by electronation mode is 12%, carbon carrier is VULACANXC-72 carbon black joins in 5ml aqueous isopropanol, and mechanical raking is disperseed for 30 minutes; Then the PTFE30 emulsion that adds 300 microlitre E.I.Du Pont Company to produce, mechanical raking 30 minutes; The above-mentioned potpourri stirring is reunited at 100 DEG C, in the time that solid-liquid two-phase obviously separates in potpourri, go supernatant liquid part to obtain bulk adherent coatings.
The carbon paper that is 33% by hydrophober content, cuts into the disk that diameter is 18mm, and bulk gained adherent coatings is applied on 50 described carbon paper disks uniformly.
By facing down of scribbling bulk adherent coatings, in the time that adherent coatings is still moistening, the PTFE waterproof ventilated membrane of itself and diameter 25mm is bondd, with running roller at 4N/cm
2under pressure, roll-in 3 minutes, obtains electrode.
50 plate electrodes of above-mentioned preparation are put into vacuum drying oven, and at 150 DEG C, thermal treatment, after 30 minutes, is taken out the cooling electrochemical carbon monoxide sensor broad spectrum activity electrode that obtains.
The preparation method of selectivity carbon monoxide electrode is same as described above, just noble metal platinum is changed into the Noble Metal Rhodium of same amount.
The test of gas response performance:
Comparative example
Adopt the carbon monoxide transducer of structure as shown in Fig. 1, for the test of gas response performance.Test condition is at ambient temperature, operation steps: first import cleaned air, then import respectively successively 500PPM alcohol gas and 500PPM CO gas, carry out the test of gas response performance with electrochemical workstation (GAMRY reference600).
Test findings as shown in Figure 4, Fig. 4 is the response condition while adopting working electrode prepared by broad spectrum activity noble metal catalyst, as seen from Figure 4 when the signal that imports sensor when cleaned air is close to 0, in the time importing 500PPM alcohol gas, the situation of change of sensor response signal is about 93uA, and the changing value of the response signal of sensor is 82uA in the time importing 500PPM CO gas, the response time is 15 seconds.Therefore ethanol can have a strong impact on the detection of CO gas as seen from Figure 4, and the intersection of carbon monoxide is disturbed and can be reached 110%.
Embodiment
Still adopt the carbon monoxide transducer of structure shown in Fig. 1, working electrode adopts selectivity carbon monoxide electrode, the same comparative example of method of testing, test result is as Fig. 5, as seen from Figure 5 in the time using selectivity carbon monoxide electrode when working electrode, in the time importing 500PPM alcohol gas, the response signal changing value of sensor is zero substantially, in the time importing 500PPM CO gas, the changing value of sensor response is 83uA, response time is 14 seconds, as seen from Figure 5 in the time using selectivity carbon monoxide electrode, it is 0 that ethanol disturbs the intersection of carbon monoxide, corresponding sensor has good selectivity to carbon monoxide.
Claims (10)
1. a carbon monoxide transducer, it is characterized in that, comprise housing, be arranged at working electrode in described housing, to electrode, contrast electrode and acidic electrolysis bath, described working electrode, electrode and contrast electrode are all contacted with acidic electrolysis bath, described working electrode, electrode and contrast electrode are included waterproof ventilated membrane and be located at the noble metal catalyst layer on described waterproof ventilated membrane.
2. carbon monoxide transducer according to claim 1, is characterized in that, described working electrode is selectivity carbon monoxide electrode.
3. according to the carbon monoxide transducer described in claim 1-2 any one, it is characterized in that, described housing comprises base and is covered on the lid on it, described working electrode, electrode, contrast electrode and acidic electrolysis bath is all contained between described base and lid; On described base, be connected with corresponding described working electrode respectively, contact conductor to electrode and contrast electrode; Described electrode, contrast electrode and working electrode below are respectively equipped with to electrode diaphragm, described electrode, contrast electrode are connected with described corresponding contact conductor by corresponding electrode diaphragm with working electrode.
4. carbon monoxide transducer according to claim 3, is characterized in that, is also provided with pole cup between described base and lid, and described acidic electrolysis bath is loaded in described pole cup; Described to electrode, contrast electrode and working electrode respectively with its noble metal catalyst layer down, be set in turn on described pole cup by back up pad.
5. carbon monoxide transducer according to claim 4, is characterized in that, described lid is provided with gas regulation film to regulate the gas content that enters described housing; Between described working electrode and upper cover, be provided with O type packing ring.
6. carbon monoxide transducer according to claim 1, is characterized in that, described acidic electrolysis bath is the acidic electrolysis bath of sulfuric acid or phosphoric acid, and wherein the content of sulfuric acid or phosphoric acid is 10 ~ 90%;
Described waterproof ventilated membrane is teflon, gathered one or more the combination in fluorothene, teflon/hexafluoroethylene multipolymer, teflon/perfluor the third vinyl ether copolymers, tygon/TFE copolymer, silicon rubber and silicon fluoride rubber; In described noble metal catalyst layer, bullion content is 10 ~ 90wt%, and noble metal is as active component, and it is one or more in platinum, ruthenium, palladium, gold, iridium, rhodium and silver.
7. carbon monoxide transducer according to claim 6, is characterized in that, in described noble metal catalyst layer, described noble metal is supported on conductive carbon particle, and described conductive carbon is carbon black, carbon nano-tube or activated charcoal.
8. according to the carbon monoxide transducer described in claim 6 or 7, it is characterized in that described working electrode, identical or different to the active component in the noble metal catalyst layer of electrode and contrast electrode.
9. a method for making for the electrode of carbon monoxide transducer, is characterized in that, comprises the following steps:
(1), noble metal catalyst powder be placed in to appropriate spreading agent fully disperse, obtain suspension;
(2), in described suspension, add appropriate hydrophober, fully mix, obtain mixed liquor;
(3), described mixed liquor is formed to bulk adherent coatings in lower stirring of heating;
(4), described adherent coatings is evenly coated on hydrophobic carbon paper;
(5), utilize the adherent coatings that is coated with on hydrophobic carbon paper by together with described hydrophobic carbon paper and waterproof ventilated membrane compacting bonding, make electrode, the noble metal catalyst layer of described hydrophobic carbon paper and the adherent coatings formation electrode being coated with it on;
Described electrode comprises working electrode, to electrode and contrast electrode.
10. the method for making of the electrode of carbon monoxide transducer according to claim 9, is characterized in that, also comprises (6), by the electrode obtained thermal treatment under vacuum state, the impurity being brought to remove hydrophober.
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