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|Title:||Electronic-reconstruction-enhanced hydrogen evolution catalysis in oxide polymorphs||Authors:||Li, Yangyang
Yu, Zhi Gen
Tang, Chi Sin
Wong, Lai Mun
Wang, Xiao Renshaw
Wee, Andrew T. S.
Breese, Mark B. H.
Pennycook, Stephen J.
Xue, Jun Min
|Issue Date:||17-Jun-2018||Publisher:||Nature Publishing Group||Citation:||Li, Yangyang, Yu, Zhi Gen, Wang, Ling, Weng, Yakui, Tang, Chi Sin, Yin Xinmao, Han Kun, Wu, Haijun, Yu, Xiaojiang, Wong, Lai Mun, Wan, Dongyang, Wang, Xiao Renshaw, Chai, Jianwei, Zhang, Yong-Wei, Wang, Shijie, Wang, John, Wee, Andrew T. S., Breese, Mark B. H., Pennycook, Stephen J., Venkatesan, Thirumalai, Dong, Shuai, Xue, Jun Min, Chen, Jingsheng (2018-06-17). Electronic-reconstruction-enhanced hydrogen evolution catalysis in oxide polymorphs. NATURE COMMUNICATIONS 10. ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-019-11124-w||Abstract:||Transition metal oxides exhibit strong structure-property correlations, which has been extensively investigated and utilized for achieving efficient oxygen electrocatalysts. However, high-performance oxide-based electrocatalysts for hydrogen evolution are quite limited, and the mechanism still remains elusive. Here we demonstrate the strong correlations between the electronic structure and hydrogen electrocatalytic activity within a single oxide system Ti2O3. Taking advantage of the epitaxial stabilization, the polymorphism of Ti2O3 is extended by stabilizing bulk-absent polymorphs in the film-form. Electronic reconstructions are realized in the bulk-absent Ti2O3 polymorphs, which are further correlated to their electrocatalytic activity. We identify that smaller charge-transfer energy leads to a substantial enhancement in the electrocatalytic efficiency with stronger hybridization of Ti 3d and O 2p orbitals. Our study highlights the importance of the electronic structures on the hydrogen evolution activity of oxide electrocatalysts, and also provides a strategy to achieve efficient oxide-based hydrogen electrocatalysts by epitaxial stabilization of bulk-absent polymorphs. � 2019, The Author(s).||Source Title:||NATURE COMMUNICATIONS||URI:||https://scholarbank.nus.edu.sg/handle/10635/168639||ISSN:||2041-1723||DOI:||10.1038/s41467-019-11124-w|
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