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Size‐Controllable Synthesis of Trimetallic RhPdPt Island‐Shaped Nanoalloys with Enhanced Electrocatalytic Performance for Ethanol Oxidation in Alkaline Medium
Author(s) -
Huang DaBing,
He PeiLei,
Yuan Qiang,
Wang Xun
Publication year - 2015
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201403310
Subject(s) - bimetallic strip , intermetallic , catalysis , alloy , nanocrystal , ethanol , materials science , nuclear chemistry , yield (engineering) , chemical engineering , chemistry , metallurgy , nanotechnology , organic chemistry , engineering
Size‐controllable, high‐yield, island‐shaped RhPdPt trimetallic nanocrystals with sub‐2.0 nm islands have been successfully synthesized through a facile aqueous solution approach. The results of X‐ray diffraction (XRD), energy‐dispersive X‐ray (EDX) line scanning and elemental mapping analysis showed the as‐synthesized RhPdPt nanocrystals are alloy structures. These island‐shaped RhPdPt trimetallic nanoalloys showed a composition‐dependent electrocatalytic performance for ethanol oxidation in alkaline medium. Due to the special structure and intermetallic synergies, the Rh 10 Pd 40 Pt 50 nanoalloys exhibited an enhanced catalytic activity and durability relative to island‐shaped Pd 50 Pt 50 bimetallic nanoalloys and commercial Pt black. The peak current density for Rh 10 Pd 40 Pt 50 nanoalloys was 1.81 and 1.38 times that for commercial Pt black and Pd 50 Pt 50 nanoalloys, respectively. In addition, the peak potential on Rh 10 Pd 40 Pt 50 nanoalloys decreased 42 mV relative to commercial Pt black and Pd 50 Pt 50 nanoalloys.