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Engineered Superhydrophilic/Superaerophobic Catalyst: Two-Dimensional Co(OH)2-CeO2 Nanosheets Supported on Three-Dimensional Co Dendrites for Overall Water Splitting.
Li, Ting; Gu, Fei; Chen, Xiao Hui; Zhang, Qing; Fu, Hong Chuan; Luo, Hong Qun; Li, Nian Bing.
Afiliação
  • Li T; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Gu F; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Chen XH; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Zhang Q; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Fu HC; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Luo HQ; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
  • Li NB; School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
Inorg Chem ; 62(6): 2784-2792, 2023 Feb 13.
Article em En | MEDLINE | ID: mdl-36705969
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)2-CeO2 nanosheet-decorated Co dendrites is proposed, named as Co(OH)2-CeO2/Co. Based on the strong electronic interaction of the Co(OH)2-CeO2 heterojunction, the electronic structure of the Co site is optimized, which facilitates the adsorption of intermediates and the dissociation of H2O. 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)2-CeO2/Co exhibits an excellent overall water-splitting activity in alkaline solution.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article