journal article·2025-02Open access

A Library of Seed@High‐Entropy‐Alloy Core–shell Nanocrystals With Controlled Facets for Catalysis

Yueh‐Chun Hsiao, Cheng‐Yu Wu, Chih‐Heng Lee, Wen‐Yang Huang, Ho Viet Thang, Chong‐Chi Chi, Wen‐Jing Zeng, Jia‐Qi Gao, Chih‐Yi Lin, Jui‐Tai Lin, Adrian M. Gardner, Hansaem Jang, Ruai‐Hung Juang, Yi‐Hong Liu, Islam M. A. Mekhemer, Ming‐Yen Lu, Ying‐Rui Lu, Ho‐Hsiu Chou, Chun‐Hong Kuo, Shan Zhou, Liang‐Ching Hsu, Hsin‐Yi Tiffany Chen, Alexander J. Cowan, Sung‐Fu Hung, Jien‐Wei Yeh, Tung‐Han Yang

Advanced Materials· Volume 37· Issue 6

Abstract

Abstract High‐entropy‐alloy (HEA) nanocrystals hold immense potential for catalysis, offering virtually unlimited alloy combinations through the inclusion of at least five constituent elements in varying ratios. However, general and effective strategies for synthesizing libraries of HEA nanocrystals with controlled surface atomic structures remain scarce. In this study, a transferable strategy for developing a library of facet‐controlled seed@HEA nanocrystals through seed‐mediated growth is presented. The synthesis of seed@HEA core–shell nanocrystals incorporating up to ten different metallic elements, with control over the number of solid‐solution HEA atomic layers is demonstrated. Epitaxial HEA growth on nanocrystal seeds with low‐index and high‐index facets leads to the formation of seed@HEA catalyst library with composition‐ and facet‐dependent catalytic activities in both electrocatalysis and photocatalysis. In situ synchrotron X‐ray absorption spectroscopy and density‐functional theory calculations are employed to identify surface active sites of the HEA, rationalizing the high level of catalytic activities achieved. This work enables facet engineering in the multi‐elemental chemical space and unveils the critical needs for their future development toward catalysis.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · High Entropy Alloys Studies · Laser-Ablation Synthesis of Nanoparticles

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical Engineering National Tsing Hua University Hsinchu 30013 Taiwan

Stephenson Institute for Renewable Energy and Department of Chemistry University of Liverpool Liverpool L69 7ZF UK

Department of Engineering and System Science National Tsing Hua University Hsinchu 30013 Taiwan

Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan

The University of Da Nang University of Science and Technology 54 Nguyen Luong Bang Danang 550000 Vietnam

Instrumentation Center National Tsing Hua University Hsinchu 30013 Taiwan

Low Energy Ion Scattering Facility George Holt Building University of Liverpool Liverpool L69 3GB UK

Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013 Taiwan

National Synchrotron Radiation Research Center Hsinchu 300 Taiwan

Department of Nanoscience and Biomedical Engineering South Dakota School of Mines and Technology Rapid City SD 57701 USA

Soil and Environmental Sciences National Chung Hsing University Taichung 402 Taiwan

College of Semiconductor Research National Tsing Hua University Hsinchu 30013 Taiwan

High Entropy Materials Center National Tsing Hua University Hsinchu 30013 Taiwan

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