Fabricating a durable electrocatalyst with performance comparable to noble metals for the alkaline hydrogen evolution reaction(HER)remains a significant challenge.In this work,we introduce a highly efficient and robus...Fabricating a durable electrocatalyst with performance comparable to noble metals for the alkaline hydrogen evolution reaction(HER)remains a significant challenge.In this work,we introduce a highly efficient and robust electrocatalyst by incorporating rhenium(Re)atoms into CoS nanoflakes(Re-CoS)for alkaline HER.The incorporation of Re atoms into the CoS lattice enhances the hybridization of Co 3d and S 2p orbitals,resulting in an optimized electronic structure that accelerates water dissociation on Co sites and optimizes hydrogen adsorptiondesorption on S sites,thereby boosting the HER rate.The optimal Re-CoS catalyst demonstrates a low overpotential of 72 mV at 10 mA cm^(-2)in 1 M KOH,along with excellent long-term stability,maintaining its catalytic activity over 200 h without significant degradation.These results suggest that the incorporation of Re atoms into CoS effectively couples the water dissociation and hydrogen addesorption steps of alkaline HER,offering a promising strategy for the development of noble metal-like electrocatalysts.展开更多
基金financially supported by the Institute for Basic Science of Korea(No.IBS-R011-D1)the National Research Foundation of Korea(NRF)(No.NRF-2022R1A2C2093415)+5 种基金the Korea Basic Science Institute(National Research Facilities and Equipment Center)grant funded by the Ministry of Education(No.2022R1A6C101A751)the National Natural Science Foundation of China(Nos.22209186 and 22479149)the Natural Science Foundation of Jiangxi Province(No.310306484080)the Key Research and Development Program of Jiangxi Province(Nos.20223BBG74004 and 20232BBG70003)the Youth Innovation Promotion Association,Chinese Academy of Sciences(No.2023343)the financial support from the National Research Foundation of Korea Grant funded by the Korean government(NRF-2021R1I1A1A01050068)
文摘Fabricating a durable electrocatalyst with performance comparable to noble metals for the alkaline hydrogen evolution reaction(HER)remains a significant challenge.In this work,we introduce a highly efficient and robust electrocatalyst by incorporating rhenium(Re)atoms into CoS nanoflakes(Re-CoS)for alkaline HER.The incorporation of Re atoms into the CoS lattice enhances the hybridization of Co 3d and S 2p orbitals,resulting in an optimized electronic structure that accelerates water dissociation on Co sites and optimizes hydrogen adsorptiondesorption on S sites,thereby boosting the HER rate.The optimal Re-CoS catalyst demonstrates a low overpotential of 72 mV at 10 mA cm^(-2)in 1 M KOH,along with excellent long-term stability,maintaining its catalytic activity over 200 h without significant degradation.These results suggest that the incorporation of Re atoms into CoS effectively couples the water dissociation and hydrogen addesorption steps of alkaline HER,offering a promising strategy for the development of noble metal-like electrocatalysts.
