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

A proton exchange membrane, fuel cell technology, applied in battery electrodes, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of simple and easy method, simple and easy operation, and cost reduction

Active Publication Date: 2014-12-31
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

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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] Weigh 1 gram of commercially available Vulcan XC-72 carbon powder, add 30% hydrogen peroxide:concentrated sulfuric acid with a volume ratio of 1:4 mixed solution 150ml, ultrasonic and stir for 3 hours, dilute with ultrapure water, let stand for 24 After 1 hour, the supernatant was filtered out, washed by centrifugation several times, dried, and ground to obtain functionalized Vulcan XC-72 carbon powder.

[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 disperse for 30 minutes to form a uniformly dispersed ...

Embodiment 2

[0052] Step (1) is the same as step (1) in Example 1.

[0053] (2) Preparation of carbon-supported iridium-nickel complexes

[0054] According to the mass ratio of functionalized Vulcan XC-72 carbon powder: sodium chloroiridate: nickel nitrate: sodium citrate 1: 0.51: 0.11: 1, respectively 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 i...

Embodiment 3

[0060] Step (1) is the same as step (1) in embodiment 1

[0061] (2) Preparation of carbon-supported iridium-nickel complexes

[0062] 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 successively, first 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.

[0063] (3) Preparation of carbon-supported iridium-nickel alloy catalyst

[0064] The carbon-supported iridium-n...

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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 belongs to the technical field of fuel cells, in particular to a method for preparing a non-platinum hydrogen anode catalyst for a proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that converts chemical energy into electrical energy. It has outstanding features such as high energy conversion efficiency, environmental friendliness, rapid startup at room temperature, high specific power and specific energy, and is recognized as the mainstream in the future. One of the power supply devices. However, the high cost has always been one of the core problems that plague its real commercialization. The main reason for its high cost comes from the extensive use of platinum as a precious metal catalyst. Compared with the cathode oxygen reduction reaction, the PEMFC anode hydrogen oxidation reaction has the characteristics of close to zero overpotential and fast kinetic reaction...

Claims

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Application Information

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Patent Type & Authority Patents(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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