Efficient PtRu/C bifunctional fuel cell anode catalyst and preparation method thereof

Abstract

The invention belongs to the field of fuel cell anode catalysts, and particularly relates to an efficient PtRu / C bifunctional fuel cell anode catalyst and a preparation method thereof. The preparationmethod comprises the following steps: mixing a Pt source and a Ru source in ethylene glycol, and performing full and uniform stirring; then adding a sodium nitrate solution, then introducing hydrogen, performing reacting, and performing cooling, washing and drying after the reaction is finished to obtain a PtRu nano-cluster; uniformly mixing the PtRu nano-cluster with carbon black, carrying out ultrasonic treatment, and carrying out heat treatment to obtain the catalyst. The chemical formula is PtxRuy-H2 / C, wherein x is greater than 0 and less than 4, y is greater than 0 and less than 4, andx+y is equal to 4. The catalyst provided by the invention has excellent methanol oxidation reaction and hydrogen oxidation reaction performances, has a higher Pt-Ru interface numbers, and has excellent methanol electro-catalysis performance, excellent specific activity and quality activity of methanol and hydrogen oxidation reaction, and good stability. The invention also provides a preparation method thereof.

Description

technical field [0001] The invention belongs to the field of fuel cell anode catalysts, in particular to a high-efficiency PtRu / C dual-function fuel cell anode catalyst and a preparation method thereof. Background technique [0002] Fuel cells have been extensively studied due to their ability to convert chemical energy into electrical energy without pollution. Proton exchange membrane fuel cells have demonstrated their excellent performance and efficacy. Hydrogen fuel cell (HFC) and direct methanol fuel cell (DMFC) are electrochemical power generation devices that do not need to go through the Carnot cycle. They have high energy conversion efficiency, no pollution, zero emissions, low operating noise, and high reliability. High, simple structure, easy maintenance and maintenance, among them, hydrogen and methanol have the advantages of wide source and operating temperature. For DMFC, it is especially suitable for mobile phones, portable notebook computers and some military...

AI Technical Summary

Problems solved by technology

So far, Pt-based catalysts are still the best catalysts for electrocatalytic methanol oxidation at the anode of fuel cells. However, Pt is expensive and prone to CO poisoning, which leads to a rapid decrease in its activity, which directly makes it difficult to realize industrial applications.

Therefore, Pt and transition metals (such as: Ru, Pd, Au and Ni, etc.) form bimetallic or trimetallic catalysts to improve the activity and stability of its electrocatalytic methanol oxidation through coordination; so far, PtRu is the most recognized It is the most effective catalyst for methanol oxidation and hydrogen oxidation. The addition of Ru can not only regulate the electronic structure of Pt, but also effectively remove the CO adsorbed on the surface of Pt. However, the activity and stability of PtRu catalysts still have room for improvement. space

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