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Wang, C., Li, W., Kistanov, A. A., Singh, H., Kayser, Y., Cao, W., & Geng, B. (2022). Structural engineering and electronic state tuning optimization of molybdenum-doped cobalt hydroxide nanosheet self-assembled hierarchical microtubules for efficient electrocatalytic oxygen evolution. Journal of Colloid and Interface Science, 628, 398–406. https://doi.org/10.1016/j.jcis.2022.08.069

Structural engineering and electronic state tuning optimization of molybdenum-doped cobalt hydroxide nanosheet self-assembled hierarchical microtubules for efficient electrocatalytic oxygen evolution

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Author: Wang, Chao1; Li, Wen1; Kistanov, Andrey A.2;
Organizations: 1College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, The Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Wuhu 241002, China
2Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2022122173017
Language: English
Published: Elsevier, 2022
Publish Date: 2022-12-21
Description:

Abstract

Cobalt-based hydroxide are ideal candidates for the oxygen evolution reaction. Herein, we use molybdenum oxide nanorods as sacrificial templates to construct a self-supporting molybdenum-doped cobalt hydroxide nanosheet hierarchical microtubule structure based on a structural engineering strategy to improve the active area of the catalyst. X-ray-based spectroscopic tests revealed that Mo (VI) with tetrahedral coordination intercalated into the interlayer of cobalt hydroxide, promoting interlayer separation. At the same time, Mo is connected with Co through oxygen bonds, which promotes the transfer of Co charges to Mo and reduces the electron cloud density of Co ions. In 1 M KOH, optimized molybdenum-doped cobalt hydroxide nanosheet microtubules only needs an overpotential of 288 mV to drive a current density of 10 mA cm⁻², which is significantly better than that of pure Co(OH)₂ nanosheets and RuO2. Structural engineering and electronic state regulation can effectively improve the oxygen evolution activity of cobalt-based hydroxide, which provides a design idea for the development of efficient oxygen evolution catalysts.

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Series: Journal of colloid and interface science
ISSN: 0021-9797
ISSN-E: 1095-7103
ISSN-L: 0021-9797
Volume: 628
Pages: 398 - 406
DOI: 10.1016/j.jcis.2022.08.069
OADOI: https://oadoi.org/10.1016/j.jcis.2022.08.069
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Subjects:
Cobalt-based hydroxide
Oxygen evolution reaction
Self-assembled
Structural engineering
Article
Funding: This work was supported by the National Natural Science Foundation of China (21871005, 22171005), the Program for Innovative Research Team of Anhui Education Committee, the Project for Collaborative Innovation of Anhui Higher Education Institutes (GXXT-2020-005, GXXT-2021-012, GXXT-2021-013). A.A.K. and W. C. acknowledge funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. 101002219), and H.S. acknowledges financial supports from University of Oulu, Finland. The CSC–IT Center for Science, Finland is thanked for computational resources.
EU Grant Number: (101002219) CATCH - Cross-dimensional Activation of Two-Dimensional Semiconductors for Photocatalytic Heterojunctions
Copyright information: © 2022 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/