Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26204
Title: Facile design of Au@Pt core-shell nanostructures : formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis
Authors: Zheng, F
Wong, WT 
Yung, KF 
Keywords: Electrocatalysis
Fuel cell
Platinum
Submonolayer
Issue Date: 2014
Publisher: Tsinghua University Press
Source: Nano research, 2014, v. 7, no. 3, p. 410-417 How to cite?
Journal: Nano Research 
Abstract: A facile design of Pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes (CNTs). The as prepared Au@Pt/CNTs catalysts display coverage-specific electrocatalysis. Au@Pt/CNTs with low Pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial Pt/C catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction (ORR) with high methanol tolerance. In contrast, simply increasing the Pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity. [Figure not available: see fulltext.]
URI: http://hdl.handle.net/10397/26204
ISSN: 1998-0124
DOI: 10.1007/s12274-014-0407-1
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