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.
Bibliographical noteFunding Information:
This research was supported by the National Research Foundation of Korea ( NRF ) grant funded by the Korea government ( MSIT ) ( 2019M3E6A1063671 , 2020R1A2C3004146 , and 2021M3D1A2051605 ). This work was also supported by Brain Pool Program through NRF funded by the Ministry of Science and ICT ( 2020H1D3A1A02081018 ).
© 2022 Elsevier B.V.
- Hydrogen evolution
ASJC Scopus subject areas
- Environmental Science(all)
- Process Chemistry and Technology