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Low-coordinated surface nickel oxide as electrocatalyst for efficient water oxidation.
- Source :
-
Journal of Catalysis . Jan2024, Vol. 429, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- [Display omitted] • A new oxygen vacancy-rich B-Ni/CP is fabricated via a simple electrodeposition method. • The Ni2+ center has a low oxygen coordination with a pyramidal symmetry. • The B-Ni/CP exhibits high electrocatalytic activity for OER. Ni-based compounds represent promising candidates as high-performance electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. Here, a new Ni oxide electrocatalyst developed via a simple electrodeposition method is reported, exhibiting enhanced catalytic activity for OER. Structural and activity analysis of the fresh and post-reaction samples reveals that the Ni2+ center has low coordination with pyramidal symmetry (NiO 5). The bulk metallic Ni readily undergoes oxidation under OER conditions to generate more low-coordinated Ni2+ and high-valence state Ni (Ni3+) species, thereby facilitating the OER reaction. This study provides new insight into the active structure of Ni-based oxide electrocatalysts and offers a simple pathway for the design and development of cost-effective and high-performance electrocatalysts for applications in OER. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219517
- Volume :
- 429
- Database :
- Academic Search Index
- Journal :
- Journal of Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 175032525
- Full Text :
- https://doi.org/10.1016/j.jcat.2023.115278