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Title: Evoking ordered vacancies in metallic nanostructures toward a vacated Barlow packing for high-performance hydrogen evolution
Authors: Zhang, Zhicheng
Liu, Guigao
Cui, Xiaoya
Gong, Yue
Yi, Ding
Zhang, Qinghua
Zhu, Chongzhi
Saleem, Faisal
Chen, Bo
Lai, Zhuangchai
Yun, Qinbai
Cheng, Hongfei
Huang, Zhiqi
Peng, Yongwu
Fan, Zhanxi
Li, Bing
Dai, Wenrui
Chen, Wei
Du, Yonghua
Ma, Lu
Sun, Cheng-Jun
Hwang, Inhui
Chen, Shuangming
Song, Li
Ding, Feng
Gu, Lin
Zhu, Yihan
Zhang, Hua
Keywords: Science::Chemistry
Issue Date: 2021
Source: Zhang, Z., Liu, G., Cui, X., Gong, Y., Yi, D., Zhang, Q., Zhu, C., Saleem, F., Chen, B., Lai, Z., Yun, Q., Cheng, H., Huang, Z., Peng, Y., Fan, Z., Li, B., Dai, W., Chen, W., Du, Y., ...Zhang, H. (2021). Evoking ordered vacancies in metallic nanostructures toward a vacated Barlow packing for high-performance hydrogen evolution. Science Advances, 7(13), eabd6647-.
Journal: Science Advances
Abstract: Metallic nanostructures are commonly densely packed into a few packing variants with slightly different atomic packing factors. The structural aspects and physicochemical properties related with the vacancies in such nanostructures are rarely explored because of lack of an effective way to control the introduction of vacancy sites. Highly voided metallic nanostructures with ordered vacancies are however energetically high lying and very difficult to synthesize. Here, we report a chemical method for synthesis of hierarchical Rh nanostructures (Rh NSs) composed of ultrathin nanosheets, composed of hexagonal close-packed structure embedded with nanodomains that adopt a vacated Barlow packing with ordered vacancies. The obtained Rh NSs exhibit remarkably enhanced electrocatalytic activity and stability toward the hydrogen evolution reaction (HER) in alkaline media. Theoretical calculations reveal that the exceptional electrocatalytic performance of Rh NSs originates from their unique vacancy structures, which facilitate the adsorption and dissociation of H2O in the HER.
ISSN: 2375-2548
DOI: 10.1126/sciadv.abd6647
Rights: © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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