期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 55, 页码 30367-30374出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.08.003
关键词
CoSP/NC; HER performance; Active sites; Firm structure; Electrical conductivity
资金
- Project of Education Department of Heilongjiang Province [1353ZD010]
Exploring non-precious materials with efficient electrocatalytic performance to replace the precious Pt-based materials for hydrogen evolution reaction (HER) is still a great challenge now. Herein, metallic Co, CoS, and P co-doped N enriched carbon (CoSP/NC) was successfully fabricated by using ZIF-67 as precursor via a facile pyrolysis, sulphurization, and phosphorization process for HER application. ZIF-67 was transformed into metallic Co doped N enriched carbon (Co/NC) undergoing the treatment of high temperature. After being sulphurized, part of metallic Co was transformed into CoS and attached firmly on the surface of the catalyst. P element was well dispersed on the catalyst during the phosphorization process. The fabricated CoSP/NC exhibits the optimal HER activity with the superior overpotential of 183 mV at 10 mA cm(-2) and the lowest Tafel slope of 64.25 mV dec(-1). Furthermore, CoSP/NC shows superior durability. The excellent HER performance may be ascribed to the abundant active sites, firm structure, and superior electrical conductivity of the carbon. Thus, this work provides a new strategy to fabricate non- precious materials with excellent HER performance for the following researchers. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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