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Engineered Superhydrophilic/Superaerophobic Catalyst: Two-Dimensional Co(OH) 2 -CeO 2 Nanosheets Supported on Three-Dimensional Co Dendrites for Overall Water Splitting.

Engineered Superhydrophilic/Superaerophobic Catalyst: Two-Dimensional Co(OH) 2 -CeO 2 Nanosheets Supported on Three-Dimensional Co Dendrites for Overall Water Splitting.

Authors :
Li T
Gu F
Chen XH
Zhang Q
Fu HC
Luo HQ
Li NB
Source :
Inorganic chemistry [Inorg Chem] 2023 Feb 13; Vol. 62 (6), pp. 2784-2792. Date of Electronic Publication: 2023 Jan 27.
Publication Year :
2023

Abstract

Efficient electrocatalysts require not only a tunable electronic structure but also great active site accessibility and favorable mass transfer. Here, a two-dimensional/three-dimensional (2D/3D) hierarchical electrocatalyst consisting of Co(OH) <subscript>2</subscript> -CeO <subscript>2</subscript> nanosheet-decorated Co dendrites is proposed, named as Co(OH) <subscript>2</subscript> -CeO <subscript>2</subscript> /Co. Based on the strong electronic interaction of the Co(OH) <subscript>2</subscript> -CeO <subscript>2</subscript> heterojunction, the electronic structure of the Co site is optimized, which facilitates the adsorption of intermediates and the dissociation of H <subscript>2</subscript> O. Moreover, the open 2D/3D structure formed by introducing the Co substrate further reduces the accumulation of heterogeneous nanosheets and promotes the radial diffusion of the electrolyte, significantly improving the utilization of active sites and shortening the electron transfer pathway. In addition, the superhydrophilic/superaerophobic interface achieved by constructing the hierarchical micro-nanostructure is beneficial to electrolyte infiltration and bubble desorption, thus ensuring favorable mass transfer. Therefore, Co(OH) <subscript>2</subscript> -CeO <subscript>2</subscript> /Co exhibits an excellent overall water-splitting activity in alkaline solution.

Details

Language :
English
ISSN :
1520-510X
Volume :
62
Issue :
6
Database :
MEDLINE
Journal :
Inorganic chemistry
Publication Type :
Academic Journal
Accession number :
36705969
Full Text :
https://doi.org/10.1021/acs.inorgchem.2c03910