CoOOH Nanosheets with High Mass Activity for Water Oxidation
Abstract
Endowing transition-metal oxide electrocatalysts with high water oxidation activity is greatly desired for production of clean and sustainable chemical fuels. Here, we present an atomically thin cobalt oxyhydroxide (γ-CoOOH) nanosheet as an efficient electrocatalyst for water oxidation. The 1.4 nm thick γ-CoOOH nanosheet electrocatalyst can effectively oxidize water with extraordinarily large mass activities of 66.6 A g(-1), 20 times higher than that of γ-CoOOH bulk and 2.4 times higher than that of the benchmarking IrO2 electrocatalyst. Experimental characterizations and first-principles calculations provide solid evidence to the half-metallic nature of the as-prepared nanosheets with local structure distortion of the surface CoO(6-x) octahedron. This greatly enhances the electrophilicity of H2O and facilitates the interfacial electron transfer between Co ions and adsorbed -OOH species to form O2, resulting in the high electrocatalytic activity of layered CoOOH for water oxidation.
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2D CoP nanosheets are more feasible for enhancing HER catalytic activity because 2D nanostructures expose catalytically active sites that promote interfacial charge transfer.
“Among them, 2D CoP nanosheets are more feasible to enhance HER catalytic activity, since the 2D nanostructures enable to expose catalytically active sites which promote interfacial charge transfer.”
From Sub‐1.5 nm Ultrathin CoP Nanosheet Aerogel: Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH Values (2018) · cites this paper as [20]
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- Authors
- Huang, J., Chen, J., Yao, T., He, J., Jiang, S., Sun, Z., Liu, Q., Cheng, W., Hu, F., Jiang, Y., Pan, Z., & Wei, S.
- Affiliations
- University of Science and Technology of China (CN)
- Corresponding author
- Liu, Qinghua
- Pan, Zhiyun
- Wei, Shiqiang
- ORCID
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2015-06-10
- Volume
- 54
- Issue
- 30
- Pages
- 8722-8727
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2165291607
- Cited by
- 670
- References
- 2
- Citations by year
- 2026: 20 · 2025: 41 · 2024: 42 · 2023: 51 · 2022: 57 · 2021: 79 · 2020: 96 · 2019: 85 · 2018: 94 · 2017: 70 · 2016: 27 · 2015: 7
- FWCI
- 19.54
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Iron oxide chemistry and applications
- Keywords
- cobalt oxyhydroxide, nanosheets, water oxidation, oxygen evolution reaction, electrocatalysts, mass activity, half-metallicity, interfacial electron transfer, atomically thin materials, transition metal oxide electrocatalysts
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