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

Kang, Yao, Wang, Shuo, Hui, Kwan San, Wu, Shuxing, Dinh, Duc Anh, Fan, Xi, Bin, Feng, Chen, Fuming, Geng, Jianxin, Cheong, Weng-Chon Max and Hui, Kwun Nam (2021) Surface reconstruction establishing Mott-Schottky heterojunction and built-in space-charging effect accelerating oxygen evolution reaction. Nano Research. ISSN 1998-0124

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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. [Figure not available: see fulltext.]

Item Type: Article
Additional Information: Funding Information: 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.
Uncontrolled Keywords: f anions,dynamic migration,nickel hydroxides,oxygen evolution reaction (oer),surface reconstruction,atomic and molecular physics, and optics,materials science(all),condensed matter physics,electrical and electronic engineering ,/dk/atira/pure/subjectarea/asjc/3100/3107
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Depositing User: LivePure Connector
Date Deposited: 23 Dec 2021 10:30
Last Modified: 04 Jan 2022 09:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/82808
DOI: 10.1007/s12274-021-3917-7

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