title: Hierarchically Porous Electrocatalyst with Vertically Aligned Defect-Rich CoMoS Nanosheets for the Hydrogen Evolution Reaction in an Alkaline Medium.
abstract: Effective electrocatalysts for the hydrogen evolution reaction (HER) in alkaline electrolytes can be developed via a simple solvothermal process. In this work, first, the prepared CoMoS nanomaterials through solvothermal treatment have a porous, defect-rich, and vertically aligned nanostructure, which is beneficial for the HER in an alkaline medium. Second, electron transfer from cobalt to MoS2that reduces the unoccupied d orbitals of molybdenum can also enhance the HER kinetics in an alkaline medium. This has been demonstrated via a comparison of the catalytic performances of CoMoS, CoS, and MoS2. Third, the solvothermal treatment time evidently impacts the electrocatalytic activity. As a result, after 24 h of solvothermal treatment, the prepared CoMoS nanomaterials exhibit the lowest onset potential (42 mV) and overpotential (98 mV) for delivering a current density of 10 mA cm-2in a 1 M KOH solution. Thus, this study provides a simple method to prepare efficient electrocatalysts for the HER in an alkaline medium.
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Zexing
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Junpo
authors.initials: J
authors.lastname: Guo
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Rong
authors.initials: R
authors.lastname: Liu
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Weiping
authors.initials: W
authors.lastname: Xiao
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Cuijuan
authors.initials: C
authors.lastname: Xuan
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Kedong
authors.initials: K
authors.lastname: Xia
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage and Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, 430074, P. R. China.
authors.forename: Deli
authors.identifier: http://orcid.org/0000-0003-2023-6478
authors.initials: D
authors.lastname: Wang
keywords: defect-rich nanosheets; electrocatalysts; hierarchically porous; hydrogen evolution reaction; vertically aligned