Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Angewandte Chemie (International ed.), 2023-08, Vol.62 (31), p.e202304510-n/a

Auflage

International ed. in English

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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−2 (2874 mA 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. A facile low‐temperature synthesis method at atmospheric pressure is employed to synthesize nanoparticles (NPs) with Pd‐enriched high‐entropy alloy (HEA) core and Pt‐enriched HEA shell in a pure phase of face‐centred cubic structure. The obtained PdAgSn/PtBi HEA NPs exhibit 2874 and 3386 mA mg(Pd+Pt)−1 for methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR), respectively.