Catalyst with low Pt loading capacity as well as preparation method and application thereof

Abstract

The invention provides a catalyst with low Pt loading capacity, a preparation method and application thereof, and the method comprises the following steps: loading PtCeO2 on a non-noble metal catalyst to prepare PtCeO2 (at) M-N-C, M being a non-noble metal, C being a carbon element, and N being a nitrogen element. The method is suitable for various forms of non-noble metal catalysts, in addition, the reaction conditions of the Pt salt and the Ce salt are mild, a subsequent high-temperature pyrolysis process is not needed, Pt and CeO2 are in a highly dispersed state, and the utilization rate of Pt can be improved by improving the dispersity of Pt, so that the cost is reduced.

Description

technical field

[0001] The invention relates to the field of non-precious metal catalysts for proton exchange membrane fuel cells, in particular to a catalyst with low Pt loading, a preparation method and application thereof. Background technique

[0002] Pt-based catalysts are usually prepared by three methods: using reducing agents such as sodium borohydride and ascorbic acid to directly support carbon supports through liquid-phase reduction reactions; using magnetron sputtering and physical vapor deposition to support Pt nanoparticles Loaded on the carbon carrier; Pt salt can also be fully impregnated on the carbon carrier, and then heat-treated under a reducing atmosphere to realize the loading of Pt on the carbon carrier. However, the traditional carbon support has no active sites and only plays the role of supporting Pt nanoparticles, and the Pt-based catalyst prepared by the traditional method is difficult to control the dispersion of Pt, and it is easy to form Pt agg...

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