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From monometallic Au nanowires to trimetallic AuPtRh nanowires: interface control for the formic acid electroxidation

Abstract

Developing easy-to-expand synthetic method for nanostructures is highly desired, which will help to investigate the effect of the type and content of the extended component on catalytic performance. Based on original Au nanowires (NWs), we design a two-step interface control strategy to synthesize a series of bimetallic AuPt NWs and trimetallic AuPtRh NWs for the formic acid oxidation reaction (FAOR). Through controlling the proportion of Au and Pt, Au/Pt interface can achieve the isolation of Pt atoms, which makes Au6Pt1/C show the complete direct dehydrogenation pathway for the FAOR. The further design and fabrication of advanced Au/Pt/Rh interface are proved to be more active than Au/Pt interface for the FAOR. The mechanism analysis and experimental results demonstrate that Rh atoms on Au/Pt/Rh interface can provide active hydroxyl species, so that the adsorption of formate and the desorption of generated hydrogen species are promoted at isolated Pt atoms on Au/Pt/Rh interface. Consequently, Au6Pt1Rh0.5/C electrocatalysts exhibit excellent mass activity (8.05 A mgPt−1) and specific activity (14.3 mA cm−2) for the FAOR, which exceed most of reported Pt-based or Pd-based electrocatalysts.

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Publication details

The article was received on 15 Jun 2018, accepted on 05 Aug 2018 and first published on 08 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA05710A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    From monometallic Au nanowires to trimetallic AuPtRh nanowires: interface control for the formic acid electroxidation

    F. Li, Y. Ding, X. Xiao, S. Yin, M. Hu, S. Li and Y. Chen, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05710A

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