A platinum-based catalyst with porous carbon nanofibers as a carrier with high catalytic activity and high durability and its preparation method

Abstract

The invention relates to a platinum-based catalyst having high catalytic activity and high durability and adopting porous carbon nano fibers as a carrier and a preparation method of the platinum-based catalyst, and particularly relates to a method of improving the catalytic activity and durability of a catalyst adopting a loose three-dimensional netted through structure composed of the porous carbon nano fibers as a carrier to load nano platinum particles and an application of the catalyst in a proton exchanging membrane fuel cell. According to the platinum-based catalyst adopting the porous carbon nano fibers as the carrier, the porous carbon nano fibers which are used as the carrier form a loose three-dimensional netted through structure, and metal platinum is loaded on the porous carbon nano fibers; the catalytic activity of the platinum-based catalyst adopting the porous carbon nano fibers as the carrier is as follows: the peak potential is 100mA ahead of that of a platinum-carbon catalyst, and the utilization rate of platinum reaches 80 percent; the durability of the platinum-based catalyst adopting the porous carbon nano fibers as the carrier is as follows: the ECSA retention rate after the fuel cell is circulated for 1000 times can reach 50 percent.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a platinum-based catalyst with high catalytic activity and high durability supported by porous carbon nanofibers and its preparation method and application, in particular to a platinum-based catalyst for improving proton exchange membrane fuel cells The method and application of the catalytic activity and durability of carbon catalysts, specifically, is a kind of catalyst that adopts a porous carbon nanofiber to form a loose three-dimensional mesh-like structure as a carrier to support nano-platinum particles to improve the catalytic activity of the catalyst and Durability method and its application for proton exchange membrane fuel cells. Background technique [0002] Proton exchange membrane fuel cell has become one of the research hotspots in the world because of its common characteristics of fuel cells such as clean and pollution-free, high energy conversion rate, fast start-...

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Problems solved by technology

Another solution is mainly by changing the composition and morphology of the catalyst carrier, but it has not been commercialized due to the complicated preparation of the carrier, the loading process of the catalyst, the presence of pollution, and the unstable performance of the catalyst.

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