文献类型：期刊文献

英文题名：Porous-structured platinum nanocrystals supported on a carbon nanotube film with super catalytic activity and durability

作者：Huang, Xin Xin[1];Chen, Yun[2];Wang, Xiao Xia[1];Wang, Jian Nong[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Nano X Res Ctr, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

年份：2015

卷号：3

期号：15

起止页码：7862

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20151500735306);WOS:【SCI-EXPANDED(收录号:WOS:000352441100025)】；

基金：Financial supports from National Natural Science Foundation of China (project #: 51271077, U1362104) and Shanghai Nano-science and Nanotechnology Promotion Center (project #: 12nm0503300) are greatly acknowledged.

语种：英文

外文关键词：Catalyst activity - Nanocatalysts - Crystal structure - Fuel cells - Yarn - Electrocatalysts - Platinum - Thin films - Electrochemical sensors - Microstructure - Nanocrystals - Secondary batteries - Carbon nanotubes

摘要：Current Pt catalysts suffer from low durability, which is hindering the implementation of fuel cells, metal-air batteries and electrochemical sensors. Here, we report Pt catalysts with not only high activity but also high durability. This was achieved by the electrodeposition of Pt crystal aggregates with a porous structure on a carbon nanotube film. Accelerated degradation testing shows that the new catalysts degrade very little even after 8000 potential cycles under harsh cycling conditions, while the typical commercial Pt/C catalyst loses most of its activity in the first 1000 cycles. Based on the microstructure evolution and electrochemical evidence, the outstanding durability is attributed to the faceted nanocrystals and their interconnected porous network, both of which limit the pathways for Pt dissolution, migration, and agglomeration. The technique reported here provides new opportunities for developing next-generation electrocatalysts for promoting their real applications in many devices.