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Hollow AuxAg/Au core/shell nanospheres as efficient catalysts for electrooxidation of liquid fuels

Abstract

One plausible approach to endow the nanocrystals with both enhanced catalytic activity and stability for the electrooxidation of liquid fuels is to chemically control the crystal structures of nanoparticles. Up till now, core-shell and alloy structures have been demonstrated to offer generally two precious opportunities to design highly efficient nanocatalysts for electrooxidation reaction of organic molecules. We herein in this work combine these two advantages and develop a general method to successfully synthesize the hollow AuxAg/Au core/shell nanospheres with the high yield approaching 100 % via a combined seed mediated and galvanic replacement method. The results from the electrochemical measurements have revealed that this as-obtained hollow AuxAg/Au core/shell nanosphere exhibited considerable high electrocatalytic performances towards ethylene glycol and glycerol oxidation with mass activity of 4585 and 3486 mA mgAu-1, which were 5.3 and 5.8-fold enhancements than those of pure Au. We trust this strategy may be extended to the syntheses of other multimetallic nanocatalysts with such fascinating nanostructures and the as-obtained hollow AuxAg/Au core/shell nanospheres can be well applied to serve as the highly desirable anode catalysts for the electrooxidation of ethylene glycol and glycerol.

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Publication details

The article was received on 19 Jun 2017, accepted on 09 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR04409G
Citation: Nanoscale, 2017, Accepted Manuscript
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    Hollow AuxAg/Au core/shell nanospheres as efficient catalysts for electrooxidation of liquid fuels

    H. Xu, J. Wang, B. Yan, K. Zhang, S. Li, C. Wang, Y. Shiraishi, Y. Du and P. Yang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04409G

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