Copper-based anode catalyst for direct methanol fuel cell, and preparation method thereof

Abstract

The invention relates to a copper-based anode catalyst for a direct methanol fuel cell, and a preparation method thereof, wherein polyvinyl alcohol polyaniline conductive hydrogel subjected to freezethawing treatment is used as a carrier, and loads a transition metal copper through electro-deposition, and calcining is performed in an inert atmosphere to obtain a composite material loaded by a nitrogen-containing carbon material and containing 60-80 wt% of elemental copper nanocrystalline. According to the invention, a brand-new catalyst carrier is adopted to load a transition metal copper through electro-deposition so as to replace precious metals, and the electronic structure of the catalyst is regulated and controlled by doping heteroatoms, so that the catalytic activity and the electrode conductivity of the catalyst are improved, and the catalyst is directly used as the anode of the direct methanol fuel cell and has excellent electrochemical reaction activity.

Description

technical field [0001] The invention relates to a fuel cell anode catalyst, in particular to a direct methanol fuel cell non-noble metal-based carbon material anode catalyst in an alkaline system and a preparation method thereof. The catalyst prepared by the invention can be used for electrocatalytic oxidation of methanol. Background technique [0002] In order to meet the increasing energy demand of human beings and solve the increasingly serious environmental problems, more and more attention has been paid to the research of green and alternative new energy sources. [0003] Among them, direct methanol fuel cell (DMFC), as a fuel cell using methanol as fuel, has the advantages of wide fuel source, convenient use, and low price, and the transportation and storage of methanol are more convenient and safe. Methanol in DMFC is directly oxidized on the electrode to convert chemical energy into electrical energy, and the product is mainly H 2 O and CO 2 , does not generate NO...

AI Technical Summary

Problems solved by technology

However, the preparation methods of traditional copper-based catalysts are complex, and the active component copper is unevenly dispersed, which affects its electrocatalytic performance for methanol oxidation and limits its wide application.

[0009] For example, in the above literature, Cu(OH) 2 -CuO / Cu catalyst with methanol oxidation current density of only 70 mA∙cm at 0.65 V (vs SCE) −2 , Cu(OH) 2 The methanol oxidation current density of the catalyst at 0.6V (vs SCE) is only 52mA∙cm −2 , while the methanol oxidation current density of Cu / NiCu NWs-220 / C catalyst at 0.5 V (vs SCE) is only 34.9 mA∙cm −2

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