CN101692494B - Poly (5-nitroindole)-supported catalyst electrode of fuel cell and preparation method thereof - Google Patents
Poly (5-nitroindole)-supported catalyst electrode of fuel cell and preparation method thereof Download PDFInfo
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- CN101692494B CN101692494B CN2009101862103A CN200910186210A CN101692494B CN 101692494 B CN101692494 B CN 101692494B CN 2009101862103 A CN2009101862103 A CN 2009101862103A CN 200910186210 A CN200910186210 A CN 200910186210A CN 101692494 B CN101692494 B CN 101692494B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a poly (5-nitroindole)-supported catalyst electrode of a fuel cell, which comprises a layer of matrix material and a catalyst layer. The matrix material is any one of copper, iron, nickel and carbon materials; and the catalyst layer is on the matrix material, and consists of poly (5-nitroindole) carrier and one or two or three of noble metal catalysts comprising platinum, rhodium, palladium, osmium, iridium, ruthenium, gold and silver. A preparation method for the poly (5-nitroindole)-supported catalyst electrode of the fuel cell comprises preparation of electrochemical solution, electro-polymerization of 5-nitroindole and electro-deposition of the catalyst. The poly (5-nitroindole)-supported catalyst electrode of the fuel cell has good thermal stability, high electric conductivity and strong adhesive force on the matrix material due to the adoption of the poly (5-nitroindole) serving as a catalyst carrier, and has good electrochemical and chemical stability in acid or alkali solution; and the catalyst electrode prepared by the preparation method can improve the dispersion degree of the catalyst and the durability of the electrode so as to improve the utilization rate of the noble metal catalyst.
Description
Technical field
The invention belongs to catalytic electrode material and preparation method thereof in the fuel cell, particularly poly-(5-nitroindoline) supported catalyst electrode of a kind of fuel cell and preparation method thereof.
Background technology
Fuel cell has plurality of advantages such as energy efficiency height, working temperature is low, pollution-free, startup is rapid as a kind of novel energy source device, has caused the great attention of scientific and technological circle and industrial circle.Normally used catalyst is the alloy of noble metal platinum or platinum in fuel cell, for example: PtRu, PtRuW, PtRuOsIr etc.Platinum is as a kind of scarce resource, and its price is very expensive, therefore needs to improve the utilance of platinum, reduces the consumption of platinum, to reach the purpose that reduces the fuel cell cost.People generally adopt carbon black as catalyst carrier at present.Yet prepared Pt/C, the utilance of the Pt among the PtM/C are not high, and major reason is the micropore that a large amount of platinum or platinum alloy particulate enter into carbon surface, because this part platinum or the platinum alloy that are buried can not act on, thereby have reduced the utilance of platinum.In addition, the conjugation between platinum or platinum alloy and the carbon is not high, and the easy oxidized corrosion of carbon carrier, thereby causes the loss of catalyst.
The conducting polymer carrier can be avoided above shortcoming, and its preparation method is also very simple.Compare with the conventional carbon black carrier, conducting polymer has excellent conducting performance, good corrosion resistance and high Stability Analysis of Structures performance, and it can improve the decentralization of catalyst granules as carrier.On the other hand, the adhesion of catalyst granules on conducting polymer increases, thereby stops the reunion and the leakage of catalyst particles, thereby improved the utilance of catalyst widely.Yet degraded or electro-chemical activity inactivation easily take place in traditional conducting polymer structure in alkaline solution, and it can only be limited in the acid solution as catalyst carrier.
Summary of the invention
The purpose of this invention is to provide a kind of have good thermal stability and conductance, strong adhesive force is arranged on host material, catalyst decentralization durability high and electrode is strong, and in acidity or alkaline solution, all have good electrochemistry and chemical stability fuel cell gather (5-nitroindoline) supported catalyst electrode and preparation method thereof.
Poly-(5-nitroindoline) supported catalyst electrode of fuel cell of the present invention, comprise one deck host material and one deck catalyst layer, host material is made up of in copper, iron, nickel, the material with carbon element any one, be catalyst layer above the host material, this layer is made up of one or both or three kinds in catalyst platinum, rhodium, palladium, osmium, iridium, ruthenium, the gold, silver noble metal and carrier poly-(5-nitroindoline).
Poly-(5-nitroindoline) supported catalyst electrode of the present invention and preparation method thereof may further comprise the steps:
1, electrochemical solution preparation
The 5-nitroindoline is dissolved in BFEE and the ether mixed solution thereof, makes the electrochemical solution that molar concentration is 10～50mmol/L;
2, the electropolymerization of 5-nitroindoline
The electrochemical solution for preparing is inserted that host material is installed is work electrode and platinum as in electrode, the electrochemical reaction appts of Ag/AgCl as reference electrode, in solution, fed nitrogen 20 minutes, to remove the dissolved oxygen in the solution, adopt cyclic voltammetry or potentiostatic method or pulse potential method, control relative saturation calomel electrode current potential is between 0-1.5V, and control polymerization electric weight scope is at 68-72mC/cm
2, electro-deposition poly-(5-nitroindoline) layer on host material;
3, the electro-deposition of catalyst
To gather the host material of (5-nitroindoline) modification inserts in the aqueous solution of 1-5mmol/L slaine; under inert gas shielding, carry out; utilize cyclic voltammetry relative saturation calomel electrode to be-0.2V electro-deposition catalyst for-0.5-0.2V or potentiostatic method relative saturation calomel electrode, control deposition electric weight is at 0.23-0.28mC/cm
2Thereby, make poly-(5-nitroindoline) supported catalyst electrode.
Poly-(5-nitroindoline) supported catalyst electrode of fuel cell of the present invention, adopt conduction poly-(5-nitroindoline) as catalyst carrier, have good thermal stability, high conductance and strong adhesive force on host material, it all has good electrochemistry and chemical stability in acidity or alkaline solution, the catalyst electrode that described preparation method makes can improve the decentralization of catalyst and improve the durability of electrode, thereby improves the utilance of noble metal catalyst.
Description of drawings
Fig. 1 is for gathering (5-nitroindoline) (PNI) cyclic voltammogram in 1mol/L KOH solution;
Fig. 2 is poly-(5-nitroindoline) load platinum electrode (Pt/PNI) and the cyclic voltammogram of Pt/C electrode in 1mol/L KOH solution;
Fig. 3 is poly-(5-nitroindoline) load platinum electrode (Pt/PNI) and the cyclic voltammogram of Pt/C electrode in 1mol/L methyl alcohol+1mol/L KOH solution.
Embodiment
Poly-(5-nitroindoline) supported catalyst electrode preparation method of a kind of fuel cell may further comprise the steps:
1, electrochemical solution preparation
The 5-nitroindoline is dissolved in BFEE and the ether mixed solution thereof, makes the electrochemical solution that molar concentration is 50mmol/L;
2, the electropolymerization of 5-nitroindoline
The 5-nitroindoline solution of the 50mmol/L for preparing is inserted that host material carbon is installed is work electrode and platinum as in electrode, the electrochemical reaction appts of Ag/AgCl as reference electrode, in solution, fed nitrogen 20 minutes, to remove the dissolved oxygen in the solution, adopt the constant potential method, control relative saturation calomel electrode current potential 1.3V, control polymerization electric weight scope is at 70mC/cm
2, at the carbon matrix material deposited polymer that powers on;
3, the electro-deposition of catalyst platinum
To gather (5-nitroindoline) film modified carbon matrix material and insert 3mmol/L H
2PtCl
6In the aqueous solution of+0.1M KCl, under protection of nitrogen gas, utilize potentiostatic method relative saturation calomel electrode to be-0.2V, platinum electrodeposition, control deposition electric weight is at 0.25mC/cm
2, making poly-(5-nitroindoline) supported catalyst platinum electrode, the platinum catalyst carrying capacity is 0.12mg/cm
2
Claims (2)
1. poly-(5-nitroindoline) supported catalyst electrode of a fuel cell, comprise one deck host material and one deck catalyst layer, it is characterized in that: host material is made up of in copper, iron, nickel, the material with carbon element any one, be catalyst layer above the host material, this layer is made up of one or both or three kinds in catalyst platinum, rhodium, palladium, osmium, iridium, ruthenium, the gold, silver noble metal and carrier poly-(5-nitroindoline).
2. the preparation method of poly-(5-nitroindoline) supported catalyst electrode of fuel cell as claimed in claim 1, it is characterized in that: it may further comprise the steps:
(1), electrochemical solution preparation
The 5-nitroindoline is dissolved in BFEE and the ether mixed solution thereof, makes the electrochemical solution that molar concentration is 10～50mmol/L;
(2), the electropolymerization of 5-nitroindoline
The electrochemical solution for preparing is inserted that host material is installed is work electrode and platinum as in electrode, the electrochemical reaction appts of Ag/AgCl as reference electrode, in solution, fed nitrogen 20 minutes, adopt cyclic voltammetry or potentiostatic method or pulse potential method, control relative saturation calomel electrode current potential is between 0-1.5V, and control polymerization electric weight scope is at 68-72mC/cm
2, electro-deposition poly-(5-nitroindoline) layer on host material;
(3), the electro-deposition of catalyst
To gather the host material of (5-nitroindoline) modification inserts in the aqueous solution of 1-5mmol/L slaine; under inert gas shielding, carry out; utilize cyclic voltammetry relative saturation calomel electrode to be-0.2V electro-deposition catalyst for-0.5-0.2V or potentiostatic method relative saturation calomel electrode, control deposition electric weight is at 0.23-0.28mC/cm
2, make poly-(5-nitroindoline) supported catalyst electrode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101862103A CN101692494B (en) | 2009-10-13 | 2009-10-13 | Poly (5-nitroindole)-supported catalyst electrode of fuel cell and preparation method thereof |
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| CN2009101862103A CN101692494B (en) | 2009-10-13 | 2009-10-13 | Poly (5-nitroindole)-supported catalyst electrode of fuel cell and preparation method thereof |
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| CN101692494A CN101692494A (en) | 2010-04-07 |
| CN101692494B true CN101692494B (en) | 2011-05-04 |
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| CN102500428A (en) * | 2011-10-25 | 2012-06-20 | 华南理工大学 | Method for improving oxygen reduction performance of negative carbon catalyst of proton exchange membrane fuel cell |
| US10003881B2 (en) | 2015-09-30 | 2018-06-19 | Apple Inc. | Earbuds with capacitive touch sensor |
| CN105390705A (en) * | 2015-10-30 | 2016-03-09 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of poly(2-phenylindole) supported catalyst electrode of fuel cell |
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