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Research Article

Crystal phase-controlled growth of PtCu and PtCo alloys on 4H Au nanoribbons for electrocatalytic ethanol oxidation reaction

Jie Wang2,§, Jian Zhang2,§, Guigao Liu2,§, Chongyi Ling1,3,§, Bo Chen2,§, Jingtao Huang2, Xiaozhi Liu4, Bing Li5, An-Liang Wang2, Zhaoning Hu2, Ming Zhou2, Ye Chen2, Hongfei Cheng2, Jiawei Liu2, Zhanxi Fan1,6, Nailiang Yang2, Chaoliang Tan2, Lin Gu4, Jinlan Wang3, Hua Zhang1,6 ()
Department of Chemistry, City University of Hong Kong, Hong Kong, China
Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
School of Physics, Southeast University, Nanjing 211189, China
Institute of Physics, Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), Singapore 138634, Singapore
Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China

§ Jie Wang, Jian Zhang, Guigao Liu, Chongyi Ling, and Bo Chen contributed equally to this work.

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Abstract

Crystal phase can greatly affect the physicochemical properties and applications of nanomaterials. However, it still remains a great challenge to synthesize nanostructures with the same composition and morphology but different phases in order to explore the phase-dependent properties and applications. Herein, we report the crystal phase-controlled synthesis of PtCu alloy shells on 4H Au nanoribbons (NRBs), referred to as 4H-Au NRBs, to form the 4H-Au@PtCu core-shell NRBs. By tuning the thickness of PtCu, 4H-PtCu and face-centered cubic (fcc) phase PtCu (fcc-PtCu) alloy shells are successfully grown on the 4H-Au NRB cores. This thickness-dependent phase-controlled growth strategy can also be used to grow PtCo alloys with 4H or fcc phase on 4H-Au NRBs. Significantly, when used as electrocatalysts for the ethanol oxidation reaction (EOR) in alkaline media, the 4H-Au@4H-PtCu NRBs show much better EOR performance than the 4H-Au@fcc-PtCu NRBs, and both of them possess superior performance compared to the commercial Pt black. Our study provides a strategy on phase-controlled synthesis of nanomaterials used for crystal phase-dependent applications.

Keywords

crystal phase4H hexagonalface-centered cubicethanol oxidation reactionphase engineering of nanomaterials

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Nano Research
Volume 13 Issue 7,
July 2020
Pages 1970-1975
DOI: 10.1007/s12274-020-2849-y
Cite this article:
Wang J, Zhang J, Liu G, et al. Crystal phase-controlled growth of PtCu and PtCo alloys on 4H Au nanoribbons for electrocatalytic ethanol oxidation reaction. Nano Research, 2020, 13(7): 1970-1975. https://doi.org/10.1007/s12274-020-2849-y
Topics:
Binary alloysChromium alloysCobalt alloysCopper alloysCrystalsElectrocatalystsGoldNanoribbonsNanostructured materialsPhysicochemical properties
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