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Research Article

Eutectic-derived high-entropy nanoporous nanowires for efficient and stable water-to-hydrogen conversion

Ying Wang1,2, Bin Yu2, Ming He1, Zhihua Zhai2, Kuibo Yin3( ), Fangong Kong1, Zhonghua Zhang2( )
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China
SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China
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Graphical Abstract

A new eutectic-directed self-templating strategy has been proposed to prepare thehigh entropy PtPdRhIrNi nanoporous nanowires, which display superior catalyticactivity coupled with excellent durability towards hydrogen evolution reaction,owing to the unique nanoporous nanowire network structure, high-entropy effect,and modified electronic states of noble metals.

Abstract

Combining multiple metal elements into one nanostructure merits untold application potential but is still a challenge for the traditional bottom-up synthesis method. Herein, we propose a eutectic-directed self-templating strategy to prepare two multi-component nanostructured alloys (PtPdRhIrNi (D-SN) and NiPtPdRhIrAl (D-SS)) through the combination of rapid solidification with dealloying. The PtPdRhIrNi nanoporous nanowires (NPNWs) represent a new family of high-entropy alloys (HEAs) containing delicate hierarchical nanostructure with ultrafine ligament sizes of ~ 2 nm in addition to one-dimensional (1D) morphology. Moreover, the PtPdRhIrNi NPNWs display excellent electrocatalytic activity and stability toward hydrogen evolution reaction, with the low overpotential of 22 and 55 mV to afford a current density of 10 mA·cm−2 in 0.5 M H2SO4 and 1.0 M KOH electrolytes, respectively. The enhanced electrocatalytic performance can be attributed to the high-entropy effect favoring the surface electronic structure for the optimized activity, the promotion impact of Ni, 1D morphology facilitating the electron transport, and the nanoporous structure promoting the electrolyte diffusion.

Keywords

high-entropy alloynanoporous nanowiresdealloyingelectrocatalysthydrogen evolution reaction

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Nano Research
Volume 15 Issue 6,
June 2022
Pages 4820-4826
DOI: 10.1007/s12274-021-4059-7
Cite this article:
Wang Y, Yu B, He M, et al. Eutectic-derived high-entropy nanoporous nanowires for efficient and stable water-to-hydrogen conversion. Nano Research, 2022, 15(6): 4820-4826. https://doi.org/10.1007/s12274-021-4059-7
Topics:
Catalytic
Part of a topical collection:
High Entropy Nanomaterials

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Received: 14 October 2021
Revised: 22 November 2021
Accepted: 08 December 2021
Published: 31 December 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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