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https://hdl.handle.net/2440/120965
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Type: | Journal article |
Title: | Non-metal single-iodine-atom electrocatalysts for the hydrogen evolution reaction |
Author: | Zhao, Y. Ling, T. Chen, S. Jin, B. Vasileff, A. Jiao, Y. Song, L. Luo, J. Qiao, S.Z. |
Citation: | Angewandte Chemie International Edition, 2019; 58(35):12252-12257 |
Publisher: | Wiley |
Issue Date: | 2019 |
ISSN: | 1433-7851 1521-3773 |
Statement of Responsibility: | Yongqiang Zhao, Tao Ling, Shuangming Chen, Bo Jin, Anthony Vasileff, Yan Jiao, Li Song, Jun Luo, and Shi-Zhang Qiao |
Abstract: | Common-metal-based single-atom catalysts (SACs) are quite difficult to design due to the complex synthesis processes required. Herein, we report a single-atom nickel iodide (SANi-I) electrocatalyst with atomically dispersed non-metal iodine atoms. The SANi-I is prepared via a simple calcination step in a vacuum-sealed ampoule and subsequent cyclic voltammetry activation. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and synchrotron-based X-ray absorption spectroscopy are applied to confirm the atomic-level dispersion of iodine atoms and detailed structure of SANi-I. Single iodine atoms are found to be isolated by oxygen atoms. The SANi-I is structural stable and shows exceptional electrocatalytic activity for the hydrogen evolution reaction (HER). In situ Raman spectroscopy reveals that the hydrogen adatom (Hads ) is adsorbed by a single iodine atom, forming the I-Hads intermediate, which promotes the HER process. |
Keywords: | Iodine; non-metal single-atom catalysts; hydrogen evolution reaction; overall water splitting; single-atom catalysts |
Rights: | © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/anie.201905554 |
Published version: | http://dx.doi.org/10.1002/anie.201905554 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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