Surface conversion derived core-shell nanostructures of Co particles@RuCo alloy for superior hydrogen evolution in alkali and seawater

Huang, Huawei ¹Jung, Hyeonjung ²Park, Cheol-Young ¹Kim, Seongbeen ¹Lee, Ahryeon ¹Jun, Hyunwoo ¹Choi, Jaeryung ¹Han, Jeong Woo ²Lee, Jinwoo¹

扫码查看

作者信息

1. Korea Adv Inst Sci & Technol KAIST
2. Pohang Univ Sci & Technol POSTECH
折叠

Abstract

Hydrogen evolution reaction (HER) in alkali involves higher energy barriers and slow reaction kinetics due to involving water dissociation process. Catalysts with proper surface properties are highly needed to optimize the surface binding energy with reaction intermediates and enhance intrinsic catalytic activity. Herein, we present an effective strategy to construct a self-standing catalyst with core-shell structure, which is composited of metallic Co nanoparticles coated by RuCo alloy layer with optimized surface properties. The Ru attracts electrons from Co and optimizes the surface electronic structure. Theoretical calculations demonstrate that the water dissociation barrier on the Co surface is decreased from 0.65 eV to 0.58 eV after alloying with Ru. Experimental results reveal that the synthesized Co@RuCo-3 features highly efficient catalytic activity together with good stability at large current densities for HER in alkali, as well as in alkaline seawater and pure seawater.

Key words

Cobalt/Core-shell/Alloy/Electrocatalysis/Hydrogen evolution/OXYGEN REDUCTION/RUTHENIUM ALLOY/ELECTROCATALYSTS/PERFORMANCE/POINTS/LIGAND

引用本文复制引用

出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量25

参考文献量53

段落导航