期刊
NANOSCALE
卷 13, 期 38, 页码 16277-16287出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr04607a
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资金
- National Natural Science Foundation of China [22179074, 21701107, 52073166, 52072226]
- Xi'an Key Laboratory of Green Manufacture of Ceramic Materials Foundation [2019220214SYS017CG039]
- Key Program for International S&T Cooperation Projects of Shaanxi Province [2020KW-038, 2020GHJD-04]
- Science and Technology Program of Xi'an, China [2020KJRC0009]
- Scientific Research Program -Shaanxi Provincial Education Department [20JY001]
- Science and Technology Resource Sharing Platform of Shaanxi Province [2020PT-022]
- Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2021-14]
- Open Project of Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education [KFKT2020-06]
- Science and Technology Plan of Weiyang District, Xi'an [202009]
A unique vanadium-mediated space confined strategy was used to construct a composite structure involving Co/Co9S8 nanoparticles anchored on Co-N-doped porous carbon (VCS@NC) as bifunctional electrocatalysts, demonstrating exceptional catalytic activity for HER and ORR. The resulting VCS@NC catalyst exhibited high efficiency and durability, surpassing the performance of commercial Pt/C catalyst in ORR.
Developing cost-effective, highly-active and robust electrocatalysts is of vital importance to supersede noble-metal ones for both hydrogen evolution reactions (HERs) and oxygen reduction reactions (ORRs). Herein, a unique vanadium-mediated space confined strategy is reported to construct a composite structure involving Co/Co9S8 nanoparticles anchored on Co-N-doped porous carbon (VCS@NC) as bifunctional electrocatalysts toward HER and ORR. Benefitting from the ultrafine nanostructure, abundant Co-N-x active sites, large specific surface area and defect-rich carbon framework, the resultant VCS@NC exhibits unexceptionable HER catalytic activity, needing extremely low HER overpotentials in pH-universal media (alkaline: 117 mV, acid: 178 mV, neutral: 210 mV) at a current density of 10 mA cm(-2), paralleling at least 100 h catalytic durability. Notably, the VCS@NC catalyst delivers high-efficiency ORR performance in alkaline solution, accompanied with a quite high half wave potential of 0.901 V, far overmatching the commercial Pt/C catalyst. Our research opens up novel insight into engineering highly-efficient multifunctional non-precious metal electrocatalysts by a metal-mediated space-confined strategy in energy storage and conversion system.
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