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Communication

Engineering the high-entropy phase of Pt-Au-Cu nanowire for electrocatalytic hydrogen evolution

Yanan Yu1,§, Guangdong Liu2,§, Shuaihu Jiang1,§, Ruya Zhang1, Huiqiu Deng2, Eric A. Stach3, Shujuan Bao4, Zhenhua Zeng5( ), Yijin Kang1( )
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
School of Physics and Electronics, Hunan University, Changsha 410082, China
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
Institute for Clean Energy & Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, China
Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA

§ Yanan Yu, Guangdong Liu, and Shuaihu Jiang contributed equally to this work.

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Graphical Abstract

Alloy phase Pt-Au-Cu was identified as one of the most promising electrocatalysts for hydrogen evolution reaction. However, electrocatalyst with such phase was not available due to the competition of phase segregation in synthesis, until now.

Abstract

Hydrogen economy, as the most promising alternative energy system, relies on the hydrogen production through sustainable water splitting which in turn relies on the high efficiency electrocatalysts. PtAuCu A1-phase alloy has been predicted to be a promising electrocatalyst for the hydrogen evolution. As such preferred phase of Pt-Au-Cu is not thermodynamically favored, herein, we stabilize PtAuCu alloy by engineering the high-entropy phase in the form of nanowire. Density functional theory (DFT) calculations indicate that, in comparison with the ordered phase and segregated phases with discrete hydrogen binding energy, the high-entropy phase provides a diverse combination of site composition to continuously tune the hydrogen binding energy, and thus generate a series of highly active sites for the hydrogen evolution. Reflecting the theoretical prediction, electrochemical tests show that the A1-phase PtAuCu nanowire significantly outperforms its nanoparticle counterpart with phase segregation, toward the electrocatalysis of hydrogen evolution, offering one of the best hydrogen evolution electrocatalysts.

Keywords

hydrogen evolution reactionphase engineeringhigh entropy alloys

Electronic Supplementary Material

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Nano Research
Volume 16 Issue 8,
August 2023
Pages 10742-10747
DOI: 10.1007/s12274-023-5868-7
Cite this article:
Yu Y, Liu G, Jiang S, et al. Engineering the high-entropy phase of Pt-Au-Cu nanowire for electrocatalytic hydrogen evolution. Nano Research, 2023, 16(8): 10742-10747. https://doi.org/10.1007/s12274-023-5868-7
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Electrocatalysis

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Received: 23 March 2023
Revised: 02 May 2023
Accepted: 24 May 2023
Published: 19 June 2023
© Tsinghua University Press 2023
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