CeOx-Decorated NiFe-Layered Double Hydroxide for Efficient Alkaline Hydrogen Evolution by Oxygen Vacancy Engineering
Abstract
As a promising bifunctional electrocatalyst for water splitting, NiFe-layered double hydroxide (NiFe LDH) demonstrates an excellent activity toward oxygen evolution reaction (OER) in alkaline solution. However, its hydrogen evolution reaction (HER) activity is challenged owing to the poor electronic conductivity and insufficient electrochemical active sites. Therefore, a three-dimensional self-supporting metal hydroxide/oxide electrode with abundant oxygen vacancies is prepared by electrodepositing CeO x nanoparticles on NiFe LDH nanosheets. According to the density functional theory calculations and experimental studies, the oxygen vacancies at the NiFe LDH/CeO x interface can be introduced successfully because of the positive charges accumulation resulting from the local electron potential difference between NiFe LDH and CeO x . The oxygen vacancies accelerate the electron/ion migration rates, facilitate the charge transfer, and increase the electrochemical active sites, which give rise to an efficient activity toward HER in alkaline solution. Furthermore, NF@NiFe LDH/CeO x needs a lower potential of 1.51 V to drive a current density of 10 mA cm -2 in overall water splitting and demonstrates a superior performance compared with the benchmark Pt/C and RuO 2 , which is indicated to be a promising bifunctional electrode catalyst.
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The change in electronic structure and lattice distortion due to the vacancies promotes the adsorption of H2O molecules and OH− groups on the catalyst surface which are favorable for electrocatalytic process.
“also promotes the adsorption of H2O molecules and OH− groups on the catalyst surface which are favorable for electrocatalytic process [60–62]”
Cites
Metallic Nickel Nitride Nanosheets Realizing Enhanced Electrochemical Water Oxidation
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Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution
Chen, Z., Duan, X., Wei, W., Wang, S., & Ni, B.-J. (2019) · Journal of Materials Chemistry A · doi:10.1039/c9ta03220g · Cited by 753 · see citing works
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- Authors
- Wang, X., Yang, Y., Diao, L., Tang, Y., He, F., Liu, E., He, C., Shi, C., Li, J., Sha, J., Ji, S., Zhang, P., Ma, L., & Zhao, N.
- Affiliations
- Tianjin University (CN)
- Institute of Applied Physics and Computational Mathematics (CN)
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Corresponding author
- Ma, Liying
- Zhao, Naiqin
- ORCID
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-09-18
- Volume
- 10
- Issue
- 41
- Pages
- 35145-35153
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2890055758
- Cited by
- 209
- References
- 1
- Citations by year
- 2026: 14 · 2025: 20 · 2024: 24 · 2023: 28 · 2022: 46 · 2021: 25 · 2020: 29 · 2019: 23
- FWCI
- 4.45
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Materials & Interfaces (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (11704277)
- State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University (KF201615)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Layered Double Hydroxides Synthesis and Applications
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Iron oxide chemistry and applications
- Keywords
- NiFe layered double hydroxide, oxygen vacancies, alkaline hydrogen evolution reaction, oxygen evolution reaction, bifunctional electrocatalysts, overall water splitting, electrodeposition, charge transfer, electrochemical active sites, binder-free electrodes, electronic conductivity
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