文献类型：期刊文献

英文题名：Fine-grained and fully ordered intermetallic PtFe catalysts with largely enhanced catalytic activity and durability

作者：Du, Xin Xin[1];He, Yang[1];Wang, Xiao Xia[1];Wang, Jian Nong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Nano Carbon Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：9

期号：8

起止页码：2623

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20163202701408);WOS:【SCI-EXPANDED(收录号:WOS:000384921700017)】；

语种：英文

外文关键词：Fuel cells - Nanoparticles - Catalyst activity - Cost reduction - Electrolytic reduction - Carbon - Durability - Porous materials - Nanocatalysts

摘要：Catalytic activity and durability improvements are still the main challenges in fuel cell commercialization. To enhance nanocatalyst performance and durability for oxygen reduction reaction (ORR), we prepare 3.6 nm sized PtFe particles with a fully ordered intermetallic structure and entrap them in a porous carbon (PtFe@C). This nanocatalyst toward ORR exhibits 8-10 times enhancement in specific and mass activities over the commercial catalyst of Pt/C. Such a large enhancement is the highest, when compared with all other kinds of intermetallic catalysts reported in the literature. Accelerated durability testing has induced only a small change to the ordered structure and a minor loss of the activity after thousands of potential cycles under harsh electrochemical conditions. The high activity and durability are attributed to the fine-grained and ordered structure of the nanoparticle and the confining effect provided by the porous carbon. The nanoparticle, PtFe@C, represents a new strategy for performance optimization and cost reduction and promoting practical applications of fuel cells.