Method for preparing carbon-supported nano-platinum-chromium intermetallic compound serving as cathode catalyst of proton exchange membrane fuel cell

A fuel cell cathode and proton exchange membrane technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, battery electrodes, etc.

Active Publication Date: 2014-03-26
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nano-platinum-chromium disordered alloy (also known as: solid solution) electrocatalyst {Yang, H., Alonso-Vante, N., Lamy, C., Akins, D.L., 2005.High methanol tolerance of carbon-supported Pt-Cr alloy Nanoparticle electrocatalysts for oxygen reduction.J Electrochem Soc152,A704-A709} have been favored by researchers due to their high redox electrocatalytic activity and stable existence under acidic conditions. There are only a few reports on platinum-chromium intermetallic electrocatalysts with ordered structures {Ghosh, T., Leonard, B.M., Zhou, Q., DiSalvo, F.J., 2010. Pt Alloy and Intermetallic Phases with V,Cr,Mn,Ni,and Cu:Synthesis As Nanomaterials and Possible Applications As Fuel Cell Catalysts.Chem Mater22,2190-2202.}

Method used

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  • Method for preparing carbon-supported nano-platinum-chromium intermetallic compound serving as cathode catalyst of proton exchange membrane fuel cell
  • Method for preparing carbon-supported nano-platinum-chromium intermetallic compound serving as cathode catalyst of proton exchange membrane fuel cell
  • Method for preparing carbon-supported nano-platinum-chromium intermetallic compound serving as cathode catalyst of proton exchange membrane fuel cell

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Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1: Preparation of carbon-supported nano-platinum-chromium intermetallic compound electrocatalyst

[0050] (1) Weigh 142.8mg of sodium chloroplatinate hexahydrate (0.254mmol, platinum element 49.53mg, molecular weight 561.87) and 22.8mg chromium trichloride hexahydrate (0.086mmol, chromium element 4.47mg, molecular weight 266.45) and dissolve in 45ml In methanol, stir for 2-10 minutes to completely dissolve; add 168.2 mg of sodium acetate to the solution with dissolved metal ions, adjust the pH of the solution to be greater than 7, and obtain an alkaline solution system; then pass carbon monoxide into the alkaline solution Remove the air in the alkaline solution system with gas, and then react at 50° C. for 12 hours under a carbon monoxide atmosphere to obtain a metal carbonyl cluster solution A;

[0051] (2) Injection of carbon support: Add 217.8 mg of KB-600 to metal carbonyl cluster solution A under nitrogen protection; stir at 55°C for 6 hours, then remove...

Embodiment 2

[0061] Embodiment 2: Preparation of carbon-supported nano-platinum-chromium intermetallic compound electrocatalyst

[0062] (1) Weigh 142.8mg of sodium chloroplatinate hexahydrate (0.254mmol, platinum element 49.53mg, molecular weight 561.87) and 68.4mg chromium trichloride hexahydrate (0.258mmol, chromium element 13.41mg, molecular weight 266.45) and dissolve in 45ml In methanol, stir for 2-10 minutes to completely dissolve; add 168.2 mg of sodium acetate to the solution with dissolved metal ions, adjust the pH of the solution to be greater than 7, and obtain an alkaline solution system; then pass carbon monoxide into the alkaline solution Remove the air in the alkaline solution system with gas, and then react at 50° C. for 12 hours under a carbon monoxide atmosphere to obtain a metal carbonyl cluster solution A;

[0063] (2) Injection of carbon support: Add 217.8 mg of KB-600 to metal carbonyl cluster solution A under nitrogen protection; stir at 55°C for 6 hours, then remov...

Embodiment 3

[0072] Embodiment 3: Preparation of carbon-supported nano-platinum-chromium intermetallic compound electrocatalyst

[0073] (1) Weigh 132.8mg of chloroplatinic acid hexahydrate (0.256mmol, platinum element 49.92mg, molecular weight 517.92) and 22.8mg chromium trichloride hexahydrate (0.086mmol, chromium element 4.47mg, molecular weight 266.45) dissolved in 45ml methanol , stir for 2-10 minutes to dissolve completely; add 168.2 mg of sodium acetate to the solution with dissolved metal ions, adjust the pH of the solution to be greater than 7, and obtain an alkaline solution system; then pass carbon monoxide gas into the alkaline solution Remove the air in the alkaline solution system, and then react at 50° C. for 12 hours under a carbon monoxide atmosphere to obtain a metal carbonyl cluster solution A;

[0074] (2) Injection of carbon support: Add 217.8 mg of KB-600 to metal carbonyl cluster solution A under nitrogen protection; stir at 55°C for 6 hours, then remove at 70°C unde...

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Abstract

The invention relates to the relevant technical fields of energy and catalysis, in particular to a method for preparing a carbon-supported nano-platinum-chromium intermetallic compound serving as a cathode catalyst of a proton exchange membrane fuel cell. The invention provides a method for preparing the carbon-supported nano-platinum-chromium intermetallic compound serving as the cathode catalyst of the proton exchange membrane fuel cell on the basis of a metal carbonyl cluster compound. The method comprises the following steps: (1) synthesizing the metal carbonyl cluster compound serving as a catalyst precursor; (2) injecting a carbon support; (3) performing thermal treatment on a catalyst intermediate; (4) forming the intermetallic compound. According to the method for preparing the carbon-supported nano-platinum-chromium intermetallic compound serving as the cathode catalyst of the proton exchange membrane fuel cell on the basis of the metal carbonyl cluster compound, provided by the invention, the prepared nano-platinum-chromium intermetallic compound has the characteristics of uniform distribution, high electric catalytic oxidation reduction performance, high stability and the like.

Description

technical field [0001] The invention relates to the technical fields related to energy and catalysis, in particular to a method for preparing a carbon-supported nano-platinum-chromium intermetallic compound as a proton exchange membrane fuel cell cathode catalyst. Background technique [0002] Proton exchange membrane fuel cells (including direct methanol fuel cells) have become a research hotspot in the field of new energy due to their advantages such as high energy density, high energy conversion efficiency, low pollution, and low operating temperature. However, the current energy conversion efficiency, cost, and lifetime of PEMFCs cannot meet the needs of practical applications. The development of electrocatalysts with high activity and stability is the key to the practical application of PEMFCs. At present, the catalysts used in the anode and cathode of proton exchange membrane fuel cells are all platinum-based nano-electrocatalysts, but their wide application is limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652H01M4/90
CPCY02E60/50
Inventor 邹志青邹亮亮杨辉
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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