A Radical-Assisted Approach to High-Entropy Alloy Nanoparticle Electrocatalysts under Ambient Conditions.

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Tác giả: Jianyun Cao, Guoliang Chen, Chengding Gu, Wanbiao Hu, Xiaohong Li, Xu Li, Frank C Walsh, Yaming Wang, Jiyang Xie

Ngôn ngữ: eng

Ký hiệu phân loại: 331.7 Labor by industry and occupation

Thông tin xuất bản: United States : ACS nano , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 238886

High-entropy alloy (HEA) nanoparticles are rising as promising catalysts but face challenges in both facile synthesis and correlation of the structure with properties. Herein, utilizing the highly reductive carbon-centered isopropyl alcohol radicals generated by UV irradiation, we report a simple yet robust wet chemical method to synthesize HEA nanoparticles under ambient conditions. These isopropanol radicals verified by electron paramagnetic resonance spectroscopy impose very large overpotentials to reduce diverse metal ions into HEA nanoparticles with five to seven different elements. Specially, the PtPdIrRhAuAgCu HEA nanoparticles on a reduced electrochemical graphene oxide (rEGO) support (PtPdIrRhAuAgCu-rEGO) demonstrate superior activity for the hydrogen evolution reaction (HER) across the entire pH range, with very small overpotentials of 11, 30, and 31 mV to deliver a current density of -10 mA cm
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