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Surface reconstruction establishing Mott-Schottky heterojunction and built-in space-charging effect accelerating oxygen evolution reaction

Nano Research volume 15, pages 2952–2960 (2022)Cite this article

Abstract

Structural reconstruction of nanomaterials offers a fantastic way to regulate the electronic structure of active sites and promote their catalytic activities. However, how to properly facilitate surface reconstruction to overcome large overpotential that stimulate the surface reconstruction has remained elusive. Herein, we adopt a facile approach to activate surface reconstruction on Ni(OH)2 by incorporating F anions to achieve electro-derived structural oxidation process and further boost its oxygen evolution reaction (OER) activity. Ex situ Raman and X-ray photoemission spectroscopy studies indicate that F ions incorporation facilitated surface reconstruction and promotes the original Ni(OH)2 transformed into a mesoporous and amorphous F-NiOOH layer during the electrochemical process. Density functional theory (DFT) calculation reveals that this self-reconstructed NiOOH induces a space-charge effect on the p-n junction interface, which not only promotes the absorption of intermediates species (*OH, *O, and *OOH) and charge-transfer process during catalysis, but also leads to a strong interaction of the p-n junction interface to stabilize the materials. This work opens up a new possibility to regulate the electronic structure of active sites and promote their catalytic activities.

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Acknowledgements

This work was funded by the Science and Technology Development Fund, Macau SAR (Nos. 0191/2017/A3, 0041/2019/A1, 0046/2019/AFJ, and 0021/2019/AIR), University of Macau (Nos. MYRG2017-00216-FST and MYRG2018-00192-IAPME), UEA funding, the National Natural Science Foundation of China (Nos. 51773211 and 21961160700), the Beijing Municipal Science & Technology Commission, the IBS (IBS-R019-D1), and the State Key Laboratory of Organic-Inorganic Composites (OIC) (No. 202101002). The DFT calculations were performed at High Performance Computing Cluster (HPCC) of Information and Communication Technology Office (ICTO) at University of Macau.

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  1. Yao Kang and Shuo Wang contributed equally to this work.

Affiliations

  1. Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau, 999078, China

    Yao Kang, Shuo Wang & Kwun Nam Hui

  2. Engineering, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, UK

    Kwan San Hui

  3. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China

    Shuxing Wu

  4. NTT hi-tech institute, Nguyen Tat Thanh university, Ho Chi Minh city, 700000, Vietnam

    Duc Anh Dinh

  5. Ningbo Institute of Materials Technology, Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Xi Fan

  6. State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Science, Beijing, 100190, China

    Feng Bin

  7. State Key Laboratory of Optic Information Physics and Technologies, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, 510006, China

    Fuming Chen

  8. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 15 North Third Ring East Road, Chaoyang District, Beijing, 100029, China

    Jianxin Geng

  9. Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Taipa, Macao, 999078, China

    Weng-Chon Max Cheong

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  1. Yao Kang
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Correspondence to Kwan San Hui, Weng-Chon Max Cheong or Kwun Nam Hui.

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Surface reconstruction establishing Mott-Schottky heterojunction and built-in space-charging effect accelerating oxygen evolution reaction

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Kang, Y., Wang, S., Hui, K.S. et al. Surface reconstruction establishing Mott-Schottky heterojunction and built-in space-charging effect accelerating oxygen evolution reaction. Nano Res. 15, 2952–2960 (2022). https://doi.org/10.1007/s12274-021-3917-7

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Keywords

  • F anions
  • dynamic migration
  • nickel hydroxides
  • surface reconstruction
  • oxygen evolution reaction (OER)