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Au Nanoparticles Modified with Pt, Ru and SnO 2 as Electrocatalysts for Ethanol Oxidation Reaction in Acids
Author(s) -
Siddharth Kumar,
Xing Zelong,
Xiao Fei,
Zhu Shangqian,
Zhang Lili,
Pan Feng,
Shao Minhua
Publication year - 2020
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.202000336
Subject(s) - electrocatalyst , anode , chemical engineering , nanoparticle , ethanol , materials science , catalysis , redox , fuel cells , chemistry , nanotechnology , inorganic chemistry , electrochemistry , electrode , organic chemistry , engineering
The anodic reaction in direct ethanol fuel cells (DEFCs), ethanol oxidation reaction (EOR) faces challenges, such as incomplete electrooxidation of ethanol and high cost of the most efficient electrocatalyst, Pt in acidic media at low temperature. In this study, core‐shell electrocatalysts with an Au core and Pt‐based shell (Au@Pt) are developed. The Au core size and Pt shell thickness play an important role in the EOR activity. The Au size of 2.8 nm and one layer of Pt provide the most optimized performance, having 6 times higher peak current density in contrast to commercial Pt/C. SnO 2 as a support also enhances the EOR activity of Au@Pt by 1.73 times. Further modifying the Pt shell with Ru atoms achieve the highest EOR current density that is 15 and 2.5 times of Pt/C and Au@Pt. Our results suggest the importance of surface modification in rational design of advanced electrocatalysts.