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Self‐Assembled Dendritic Pt Nanostructure with High‐Index Facets as Highly Active and Durable Electrocatalyst for Oxygen Reduction
Author(s) -
Jang Youngjin,
Choi KwangHyun,
Chung Dong Young,
Lee Ji Eun,
Jung Namgee,
Sung YungEun
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700852
Subject(s) - electrocatalyst , catalysis , nanocrystal , nanostructure , proton exchange membrane fuel cell , materials science , durability , nanotechnology , chemical engineering , fuel cells , oxygen reduction reaction , chemistry , electrochemistry , electrode , composite material , organic chemistry , engineering
The durability issues of Pt catalyst should be resolved for the commercialization of proton exchange membrane fuel cells. Nanocrystal structures with high‐index facets have been recently explored to solve the critical durability problem of fuel cell catalysts as Pt catalysts with high‐index facets can preserve the ordered surfaces without change of the original structures. However, it is very difficult to develop effective and practical synthetic methods for Pt‐based nanostructures with high‐index facets. The current study describes a simple one‐pot synthesis of self‐assembled dendritic Pt nanostructures with electrochemically active and stable high‐index facets. Pt nanodendrites exhibited 2 times higher ORR activity and superior durability (only 3.0 % activity loss after 10 000 potential cycles) than a commercial Pt/C. The enhanced catalytic performance was elucidated by the formation of well‐organized dendritic structures with plenty of reactive interfaces among 5 nm‐sized Pt particles and the coexistence of low‐ and high‐index facets on the particles.