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

Lao, Xianzhuo; Liao, Xuejiang; Chen, Chen; Wang, Jiasheng; Yang, Likang; Li, Ze; Ma, Jun-Wei; Fu, Aiping; Gao, Hongtao; Guo, Peizhi

Pd-Enriched-Core/Pt-Enriched-Shell High-Entropy Alloy with Face-Centred Cubic Structure for C₁ and C₂ Alcohol Oxidation.

Lao, Xianzhuo; Liao, Xuejiang; Chen, Chen; Wang, Jiasheng; Yang, Likang; Li, Ze; Ma, Jun-Wei; Fu, Aiping; Gao, Hongtao; Guo, Peizhi.

Afiliação

Lao X; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Liao X; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Chen C; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Wang J; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Yang L; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Li Z; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Ma JW; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Fu A; College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China.
Gao H; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Guo P; Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.

Angew Chem Int Ed Engl ; 62(31): e202304510, 2023 Aug 01.

Article em En | MEDLINE | ID: mdl-37278913

ABSTRACT

ABSTRACT

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 4.7âmA cm-2 (2874âmA mg(Pd+Pt) -1 ), 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.

Palavras-chave

Alcohol Oxidation; DFT Calculations; High-Entropy Alloy; Nanocatalysis; Nanoparticles

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Ano de publicação: 2023 Tipo de documento: Article