Preparation method of direct methanol fuel cell anode catalyst

A methanol fuel cell and catalyst technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of scarce resources, high price, high cost, etc., and achieve self-agglomeration, improve utilization, and improve catalytic performance. Effect

Inactive Publication Date: 2012-03-21
NANCHANG UNIV
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Problems solved by technology

Platinum-based alloy catalysts can significantly improve the catalytic effect and anti-poisoning ability of methanol, but the second metals used in the literat

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  • Preparation method of direct methanol fuel cell anode catalyst
  • Preparation method of direct methanol fuel cell anode catalyst
  • Preparation method of direct methanol fuel cell anode catalyst

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[0027] Example 1

[0028] (1) Preparation of graphene: 1.0 g graphite and 1.0 g NaNO 3 Add to 46 mL of 98% H 2 SO 4 In the solution, mechanically stir in an ice bath for 20 minutes, then slowly add 6.0 g KMnO 4 And 80 mL of secondary water, control the temperature to 90 ± 5 °C; after stirring for 30 minutes, add 200 mL of secondary water to the reaction system and slowly add 6 mL of 30% H 2 O 2 The solution is filtered while it is hot and washed with secondary water until the filtrate is neutral; the resulting product is dispersed in 500 mL secondary water and ultrasonicated for 2 hours to obtain uniformly dispersed single-sheet graphene.

[0029] (2) Preparation of PEI functionalized graphene: ultrasonically disperse 20 mg of graphene in 50 mL of 1 mol / L NaCl solution, then add 1.08 g of PEI, continue ultrasonication for 4.5 hours; then centrifuge the reaction solution and wash it with secondary water , The product was dried in vacuum at 40 °C for 48 hours, the product was labele...

Example Embodiment

[0031] Example 2

[0032] (1) Preparation of graphene: 1.0 g graphite and 1.0 g NaNO 3 Add to 46 mL of 98% H 2 SO 4 In the solution, mechanically stir in an ice bath for 20 minutes, then slowly add 6.0 g KMnO 4 And 80 mL of secondary water, control the temperature to 90 ± 5 °C; after stirring for 30 minutes, add 200 mL of secondary water to the reaction system and slowly add 6 mL of 30% H 2 O 2 The solution is filtered while it is hot and washed with secondary water until the filtrate is neutral; the resulting product is dispersed in 500 mL secondary water and ultrasonicated for 2 hours to obtain uniformly dispersed single-sheet graphene.

[0033] (2) Preparation of PEI functionalized graphene: Disperse 20 mg of graphene in 50 mL of 1 mol / L NaCl solution, add 1.08 g of PEI after sonication for 1 hour, and continue sonication for 4.5 hours; then centrifuge the reaction solution and use two After washing with water, the product was dried in vacuum at 40 °C for 48 hours. The product ...

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Abstract

The invention discloses a preparation method of a direct methanol fuel cell anode catalyst, and belongs to the technical field of electrocatalysis and energy. The method comprises the following steps: firstly preparing polyethyleneimine (PEI) functionalized graphene, then mixing H2PtCl6, CuCl2 and PEI functionalized graphene according to a certain mass ratio, dispersing in secondary water by ultrasonic, performing in-situ reduction of H2PtCl6 and CuCl2 by sodium borohydride under a room temperature condition so as to prepare a PtCu two-component nanoparticle/graphene catalyst (PtCu/graphene). The PtCu two-component nanoparticles (PtCuNPs) prepared by the method of the invention are uniformly dispersed on PEI functionalized graphene, and the particle size of the PtCu alloy nanoparticles is about 4-6 nm. Electrochemical experiment results show that the PtCu/graphene catalyst has excellent electrocatalytic activity for methanol oxidation; and the method is simple in operation, is mild and controllable in experiment conditions, and has extensive application prospects.

Description

technical field [0001] The invention relates to a preparation method of an anode catalyst, in particular to a preparation method of a direct methanol fuel cell anode catalyst. Background technique [0002] A fuel cell is an energy device that directly converts the chemical energy of fuel into electrical energy by chemical reaction without combustion. It has the advantages of high energy conversion density, low pollution, diverse fuels, high reliability, low noise and easy maintenance. , has been highly valued by countries all over the world. In particular, the research on direct methanol fuel cells has attracted more attention, because it can be widely used in power sources, mobile phones and laptop computers, etc., and is considered one of the most likely alternative energy technologies for large-scale commercial applications. However, the anode catalyst of the direct methanol fuel cell has low electrocatalytic activity, and the CO produced during the electrocatalytic oxi...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/89H01M4/92
CPCY02E60/50
Inventor 邱建丁王果冲梁汝萍刘晓晨
Owner NANCHANG UNIV
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