Cited by 1,428Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsIron oxide chemistry and applications

Ultrathin Spinel‐Structured Nanosheets Rich in Oxygen Deficiencies for Enhanced Electrocatalytic Water Oxidation

Bao, Jian, Zhang, Xiaodong, Fan, Bo, Zhang, Jiajia, Zhou, Min, Yang, Wenlong, Hu, Xin, Wang, Hui +2 more·2015·Angewandte Chemie International Edition

Abstract

Electrochemical water splitting is a clean technology for H2 fuels, but greatly hindered by the slow kinetics of the oxygen evolution reaction (OER). Herein, a series of spinel-structured nanosheets with oxygen deficiencies and ultrathin thicknesses were designed to increase the reactivity and the number of active sites of the catalysts, which were then taken as an excellent platform for promoting the water oxidation process. Theoretical investigations showed that the oxygen vacancies confined in the ultrathin nanosheet could lower the adsorption energy of H2O, leading to increased OER efficiency. As expected, the NiCo2O4 ultrathin nanosheets rich in oxygen vacancies exhibited a large current density of 285 mA cm(-2) at 0.8 V and a small overpotential of 0.32 V, both of which are superior to the corresponding values of bulk samples or samples with few oxygen deficiencies and even higher than those of most reported non-precious-metal catalysts. This work should provide a new pathway for the design of advanced OER catalysts.

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Crossref · 10.1002/anie.201502226

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Authors
Bao, J., Zhang, X., Fan, B., Zhang, J., Zhou, M., Yang, W., Hu, X., Wang, H., Pan, B., & Xie, Y.
Affiliations
  • University of Science and Technology of China (CN)
  • Technische Universität Ilmenau (DE)
Corresponding author
  • Zhang, Xiaodong
  • Xie, Yi
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2015-05-07
Volume
54
Issue
25
Pages
7399-7404
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2151061566
Cited by
1,428
References
34
Citations by year
2026: 55 · 2025: 90 · 2024: 123 · 2023: 120 · 2022: 153 · 2021: 174 · 2020: 196 · 2019: 187 · 2018: 156 · 2017: 105 · 2016: 55 · 2015: 14
FWCI
32.52
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
oxygen evolution reaction, electrocatalytic water oxidation, oxygen vacancies, ultrathin nanosheets, NiCo2O4, non-noble metal catalysts, water splitting, hydrogen production, water adsorption energy

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