Metallic Co,CoS, and P co-doped N enriched carbon derived from ZIF-67 as an efficient catalyst for hydrogen evolution reaction |
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Affiliation: | 1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China;2. Yantai Research Institute and Graduate School of Harbin Engineering University, Yantai, Shandong 265502, PR China;3. College of Material Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, PR China |
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Abstract: | 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. |
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Keywords: | CoSP/NC HER performance Active sites Firm structure Electrical conductivity |
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