Pd-Enriched-Core/Pt-Enriched-Shell High-Entropy Alloy with Face-Centred Cubic Structure for C 1 and C 2 Alcohol Oxidation

High-entropy alloy nanoparticles (HEA NPs) have aroused great interest globally with their unique electrochemical, catalytic, and mechanical properties, as well as diverse activity and multielement tunability for multi-step reactions. Herein, a facile low-temperature synthesis method at atmospheric...

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Published in:Angewandte Chemie International Edition 2023-08, Vol.62 (31), p.e202304510
Main Authors: Lao, Xianzhuo, Liao, Xuejiang, Chen, Chen, Wang, Jiasheng, Yang, Likang, Li, Ze, Ma, Jun-Wei, Fu, Aiping, Gao, Hongtao, Guo, Peizhi
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cited_by cdi_FETCH-LOGICAL-c1073-67a2b1c54d5fd97cee1393e5eac24a3acb5510daafaaafc2c52fdbee2ed1658b3
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container_issue 31
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container_title Angewandte Chemie International Edition
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creator Lao, Xianzhuo
Liao, Xuejiang
Chen, Chen
Wang, Jiasheng
Yang, Likang
Li, Ze
Ma, Jun-Wei
Fu, Aiping
Gao, Hongtao
Guo, Peizhi
description High-entropy alloy nanoparticles (HEA NPs) have aroused great interest globally with their unique electrochemical, catalytic, and mechanical properties, as well as diverse activity and multielement tunability for multi-step reactions. Herein, a facile low-temperature synthesis method at atmospheric pressure is employed to synthesize Pd-enriched-HEA-core and Pt-enriched-HEA-shell NPs with a single phase of face-centred cubic structure. Interestingly, the lattice of both Pd-enriched-HEA-core and Pt-enriched-HEA-shell enlarge during the formation process of HEA, with tensile strains included in the core and shell of HEA. The as-obtained PdAgSn/PtBi HEA NPs show excellent electrocatalytic activity and durability for methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The specific (mass) activity of PdAgSn/PtBi HEA NPs for MOR is 4.7 mA cm (2874 mA mg ), about 1.7 (5.9) and 1.5 (4.8) times higher than that of commercial Pd/C and Pt/C catalysts, respectively. Additional to high-entropy effect, Pt sites and Pd sites on the interface of the HEA act synergistically to facilitate the multi-step process towards EOR. This study offers a promising way to find a feasible route for scalable HEA manufacturing with promising applications.
doi_str_mv 10.1002/anie.202304510
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