Size‐adjustable High‐Entropy Alloy Nanoparticles as an Efficient Platform for Electrocatalysis DOI Open Access

Huizhu Cai,

Hengpan Yang, Shijie He

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Abstract The high entropy alloy (HEA) possesses distinctive thermal stability and electronic characteristics, which exhibits substantial potential for diverse applications in electrocatalytic reactions. nanosize of HEA also has a significant impact on its catalytic performance. However, accurately controlling synthesizing small nanomaterials remains challenge, especially the ultrasmall nanoparticles. Herein, we firstly calculate illustrate size structure as well adsorption energies crucial intermediates involved typical processes, such hydrogen evolution reaction (HER), oxygen reduction (ORR), CO 2 electroreduction (CO RR) NO 3 − (NO RR). Under guidance theoretical calculations, synthesize range PtRuPdCoNi nanoparticles with adjustable sizes (1.7, 2.3, 3.0, 3.9 nm) using one‐step spatially confined approach, without any further treatment. Experimentally, smaller HEAs is more favorable HER ORR performances, aligning predictions. Specifically, sized at 1.7 nm (HEA‐1.7) endows 16 mV overpotential current density 10 mA cm −2 , yielding mass activity 31.9 A mg NM −1 noble metal HER, significantly outperforming commercial Pt/C catalyst. This strategy can be easily applicable to other reactions (e.g. ) attributed richness components adjustability, presenting promising platform various advanced catalysts.

Language: Английский

Size‐adjustable High‐Entropy Alloy Nanoparticles as an Efficient Platform for Electrocatalysis DOI Open Access

Huizhu Cai,

Hengpan Yang, Shijie He

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Abstract The high entropy alloy (HEA) possesses distinctive thermal stability and electronic characteristics, which exhibits substantial potential for diverse applications in electrocatalytic reactions. nanosize of HEA also has a significant impact on its catalytic performance. However, accurately controlling synthesizing small nanomaterials remains challenge, especially the ultrasmall nanoparticles. Herein, we firstly calculate illustrate size structure as well adsorption energies crucial intermediates involved typical processes, such hydrogen evolution reaction (HER), oxygen reduction (ORR), CO 2 electroreduction (CO RR) NO 3 − (NO RR). Under guidance theoretical calculations, synthesize range PtRuPdCoNi nanoparticles with adjustable sizes (1.7, 2.3, 3.0, 3.9 nm) using one‐step spatially confined approach, without any further treatment. Experimentally, smaller HEAs is more favorable HER ORR performances, aligning predictions. Specifically, sized at 1.7 nm (HEA‐1.7) endows 16 mV overpotential current density 10 mA cm −2 , yielding mass activity 31.9 A mg NM −1 noble metal HER, significantly outperforming commercial Pt/C catalyst. This strategy can be easily applicable to other reactions (e.g. ) attributed richness components adjustability, presenting promising platform various advanced catalysts.

Language: Английский

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