Self-assembly of Ni2P/CoSe2 heterostructure as bifunctional electrocatalysts for urea-water electrolysis |
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| Affiliation: | 1. Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed By the Province and Ministry & Ministry of Education Key Laboratory for Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062 PR China;2. College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China;3. Hubei Trisun Chemicals Co,Ltd, Xingfa Group Yichang, 443711, China |
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| Abstract: | In this paper, M-Se-L (M = Co, Ni, Fe. L = Se At%) were synthesized by solvothermal method. The results from electrochemical testing showed that Co–Se-75% (CoSe2) has the highest catalytic performance among all M-Se-L. Furthermore, Ni2P was compounded with CoSe2 to form a heterogeneous structure Ni2P/CoSe2/NF. And the temperature and quality of NaH2PO2 during the synthesis process were optimized. It was found that the Ni2P/CoSe2/NF synthesized at 300 °C with 1.2 g NaH2PO2 had better catalytic performance. Only 1.383 V is required for UOR to reach 100 mA cm?2. In alkaline urea-water system, the electrolytic voltage of Ni2P/CoSe2/NF||Ni2P/CoSe2/NF dual-electrode electrolyzer 1.607 V required to reach 100 mA cm?2. The present work shows that Ni2P/CoSe2/NF is an efficient bifunctional electrocatalyst with good prospects for industry applications. |
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| Keywords: | Metal selenides Bifunctional electrocatalyst Alkaline urea-water system |
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