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Title: Fluorine-induced dual defects in cobalt phosphide nanosheets enhance hydrogen evolution reaction activity
Authors: Xu, Kun
Sun, Yiqiang
Li, Xiuling
Zhao, Zihan
Zhang, Yongqi
Li, Cuncheng
Fan, Hong Jin
Keywords: Science::Chemistry
Issue Date: 2020
Source: Xu, K., Sun, Y., Li, X., Zhao, Z., Zhang, Y., Li, C., & Fan, H. J. (2020). Fluorine-induced dual defects in cobalt phosphide nanosheets enhance hydrogen evolution reaction activity. ACS Materials Letters, 2(7), 736-743. doi:10.1021/acsmaterialslett.0c00209
Journal: ACS Materials Letters
Abstract: Introduction of defects in a controllable way is important to modulate the electronic structure of catalysts towards enhancement of electrocatalytic activity. Herein, we report that fluorine incorporation into cobalt phosphide alloy has a unique effect – it creates both F-anion doping and P vacancy, which results in nearly 15-fold enhancement in catalytic activity for hydrogen evolution reaction (HER) in neutral solution. The existence of dual defects in CoP is confirmed by extended X-ray absorption fine structure (EXAFS) curve fitting results and density functional theory calculation. We show that the dual-defect feature is beneficial to increasing the active site exposure, tuning the surface wettability and optimizing the electronic configuration of CoP for HER. Our fluorine based modulation protocol may be applicable to other metal alloy electrocatalysts towards more efficient energy conversion reactions.
ISSN: 2639-4979
DOI: 10.1021/acsmaterialslett.0c00209
DOI (Related Dataset): 10.21979/N9/HGBS3A
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Materials Letters, copyright @ American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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