Core shell carbon nano-structure electrocatalyst with high catalytic performance and preparation method thereof

Abstract

The invention discloses a core shell carbon nano-structure electrocatalyst with high catalytic performance and a preparation method thereof. Phthalocyanine iron having an enclosed edge structure is used as a shell, a conductive carbon is used as a core, and an Fe-N4 central structure of iron phthalocyanine unit is used as an active site. The preparation method comprises the following steps: 1), adding the conductive carbon into a mixed solution of pyromellitic dianhydride and phthalic anhydride, and performing drying to obtain powder A; 2), uniformly mixing the powder A with an iron compound,ammonium molybdate and urea to obtain powder B, heating to ensure that the powder B is a fused solution, performing microwave reaction to ensure that in-site polymerization reaction is carried out, and performing washing and drying to obtain the core shell carbon nano-structure electrocatalyst with the high catalytic performance. Being obviously superior to commercial Pt / C catalyst, the novel core shell carbon catalyst disclosed by the invention has excellent high oxygen reduction catalytic activity, excellent circulation stability and excellent CH3OH / CO tolerance; the raw materials used by synthesis of the catalyst are market developed products and are low in cost; the preparation process is simple and feasible, and is suitable for commercial mass production.

Description

technical field [0001] The invention belongs to the field of fuel cells, and relates to a core-shell carbon nanostructure electrocatalyst for fuel cell cathodes and a preparation method thereof. Background technique [0002] Energy crisis and environmental degradation are the main problems facing the development of human society today. Fuel cells have the characteristics of rich fuel hydrogen resources, high specific energy, and no pollution. They are considered to be one of the main power supply devices to solve future energy problems. For many years, the key to restricting the scale of fuel cells is their high cost. What is exciting is that Japan has recently achieved another breakthrough in fuel cell technology, and its cost has dropped significantly. At the end of 2014, Toyota launched the mass production and launch plan of Mirai fuel cell vehicles, ushering in a new era of development for the commercial popularization of fuel cells. . [0003] Nevertheless, the limit...

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Problems solved by technology

However, in the follow-up engineering application research, it was found that the performance of the assembled battery could not be well exerted, and the problem of poor cycle stability greatly restricted its industrialization process, which is also the key technology that such catalysts urgently need to break through

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