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Preparation method for non-Pt non-H anode catalyst of proton exchange membrane fuel cell (PEMFC)

A proton exchange membrane and fuel cell technology, applied in battery electrodes, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve large-scale commercial production, high-efficiency catalytic hydrogen oxidation performance, and methods simple and easy effects

Active Publication Date: 2013-10-02
重庆铈坦新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a non-platinum-hydrogen anode catalyst for a proton exchange membrane fuel cell in view of the problems existing in the preparation method of an iridium-based catalyst

Method used

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  • Preparation method for non-Pt non-H anode catalyst of proton exchange membrane fuel cell (PEMFC)
  • Preparation method for non-Pt non-H anode catalyst of proton exchange membrane fuel cell (PEMFC)
  • Preparation method for non-Pt non-H anode catalyst of proton exchange membrane fuel cell (PEMFC)

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Functionalization of carbon supports

[0034] Take a 500ml round bottom flask, weigh 1 gram of commercially available Vulcan XC-72 carbon powder, add 150ml of a mixed solution of 30% hydrogen peroxide:concentrated sulfuric acid with a volume ratio of 1:4, ultrasonicate and stir for 3 hours, then use ultra-pure Dilute it with water, let it stand for 24 hours, filter out the supernatant, and get the functionalized Vulcan XC-72 carbon powder after several times of centrifugal washing, drying, and grinding.

[0035] (2) Preparation of carbon-supported iridium-nickel complexes

[0036] According to the mass ratio of functionalized Vulcan XC-72 carbon powder: chloroiridic acid: nickel chloride: sodium citrate 1: 0.45: 0.13: 1.17, respectively weigh the functionalized Vulcan XC-72 carbon powder and iridium chloride obtained in step (1) acid, nickel chloride and sodium citrate; first add the functionalized Vulcan XC-72 carbon powder into deionized water, and ultrasonically...

Embodiment 2

[0053] Step (1) is the same as step (1) in Example 1.

[0054] (2) Preparation of carbon-supported iridium-nickel complexes

[0055] According to the mass ratio of functionalized Vulcan XC-72 carbon powder: sodium chloroiridate: nickel nitrate: sodium citrate 1︰0.51︰0.11︰1, weigh the functionalized Vulcan XC-72 carbon powder and iridium chloride obtained in step (1) sodium citrate, nickel nitrate and sodium citrate; first add the functionalized Vulcan XC-72 carbon powder into deionized water, and ultrasonically disperse for 30 minutes to form a uniformly dispersed functionalized Vulcan XC-72 carbon powder with a mass concentration of 15 mg / ml Suspension; Then add sodium chloroiridate, nickel nitrate and sodium citrate successively, first ultrasonically disperse for 20 minutes, continue to stir for 15 hours, then adjust the pH value to 11.5 with mass concentration of 28% ammonia water, seal and stir for 15 hours, then Dry it in a water bath at 60°C and grind it into powder to ...

Embodiment 3

[0062] Step (1) is the same as step (1) in Example 1

[0063] (2) Preparation of carbon-supported iridium-nickel complexes

[0064] Weigh the functionalized Vulcan XC-72 carbon powder, chlorine Sodium iridite, nickel sulfate and sodium citrate; first add functionalized Vulcan XC-72 carbon powder to deionized water, and ultrasonically disperse for 60 minutes to form a uniformly dispersed functionalized Vulcan XC-72 with a mass concentration of 25 mg / ml Carbon powder suspension; then add sodium chloroiridite, nickel sulfate and sodium citrate in sequence, ultrasonically disperse for 10 minutes, continue stirring for 6 hours, then adjust the pH value to 11 with ammonia water with a mass concentration of 28%, and seal and stir for 6 hours hours, then dried in a water bath at 50°C, and ground into powder to obtain a carbon-supported iridium-nickel complex.

[0065] (3) Preparation of carbon-supported iridium-nickel alloy catalyst

[0066] The carbon-supported iridium-nickel comp...

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Abstract

The invention aims to provide a preparation method for a non-Pt non-H anode catalyst of a proton exchange membrane fuel cell (PEMFC) to solve the problems of the conventional Ir-based catalyst preparation method. The method comprises the following steps: Ni ammonia complex cations are formed by taking strong ammonia solution as a complexant; Ni-Ir precursor is uniformly deposited on the surface of conductive carbon carrier due to the static attraction function between the Ni ammine complex cations and Ir complex anions under a water bath drying evaporation condition; finally, Ir and Ni are slowly released, reduced and alloyed from the complex compounds through hydrogen atmosphere heat treatment so as to form carbon carried Ir-Ni alloy catalyst of which the ingredients are uniform and the nano particles are distributed uniformly. According to the invention, the conventional Ir-based catalyst preparation method is greatly simplified; the surface of prepared catalyst is clean; the particle size of the catalyst is small; the catalyst is high in dispersion; the metal utilization ratio as well as the hadrogen and oxidization activity is effectively improved.

Description

Technical field [0001] The invention is a fuel cell technology field, which specializes in a preparation method for a proton exchange membrane fuel cell non -platinum anode catalyst. Background technique [0002] Proton switching membrane fuel cell (PEMFC) is a device that converts chemical energy into electrical energy. It has high energy conversion efficiency, environmentally friendly, rapid room temperature start, high power and high energy. It is recognized as the mainstream in the futureOne of the power supply devices.However, the high cost of living has always been one of the core issues that plagued them to truly realize commercialization. The main reason for its high cost comes from the large amount of precious metal catalyst platinum.Compared to the cathode oxygen reaction, the PEMFC anode hydroxidation reaction has the characteristics of nearly zero potential and fast dynamic response rate. It is expected to meet the actual application requirements when using non -plati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89H01M4/90
CPCY02E60/50
Inventor 魏子栋张薇薇陈四国丁炜王紫娟汪虹敏
Owner 重庆铈坦新材料技术研究院有限公司
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