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Enhanced Electrokinetics of C−C Bond Splitting during Ethanol Oxidation by using a Pt/Rh/Sn Catalyst with a Partially Oxidized Pt and Rh Core and a SnO 2 Shell
Author(s) -
Yang Guangxing,
Frenkel Anatoly I.,
Su Dong,
Teng Xiaowei
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201600429
Subject(s) - catalysis , chemistry , electron transfer , metal , scanning transmission electron microscopy , anode , chemical engineering , ternary operation , transmission electron microscopy , inorganic chemistry , materials science , nanotechnology , photochemistry , organic chemistry , electrode , computer science , engineering , programming language
Direct ethanol fuel cells (DEFCs) are a promising technology for generating electricity through the electro‐oxidation of liquid ethanol. Its implementation requires the development of anode catalysts capable of producing CO 2 and yielding 12‐electron transfer through breaking the C−C bond of ethanol. Here, we presented comprehensive studies of the electrokinetics of CO 2 generation on Pt/Rh/Sn ternary catalysts. Our studies showed that the triphasic PtRhO x –SnO 2 catalysts with a partially oxidized Pt and Rh core and a SnO 2 shell, validated by X‐ray absorption analyses and scanning transmission electron microscope‐electron energy loss spectroscopy line scans, coincided with a 2.5‐fold increase in the CO 2 generation rate towards ethanol oxidation reaction, compared with the biphasic PtRh‐SnO 2 catalysts with a metallic PtRh alloy core and commercial Pt. These studies provided insight into the design of a new genre of electrocatalysts with a partially oxidized noble metal.