title: Sulfurizing-Induced Hollowing of Co9S8Microplates with Nanosheet Units for Highly Efficient Water Oxidation.
abstract: Transition metal-based compounds are promising alternative nonprecious electrocatalysts for oxygen evolution to noble metals-based materials. Nanosheet-constructed hollow structures can efficiently promote the electrocatalystic activity, mainly because of their largely exposed active sites. Herein, hierarchical Co9S8hollow microplates with nanosheet building units are fabricated via sulfurization and subsequent calcination of preformed Co-glycolate microplates. Benefiting from the advantages of a hollow structure, nanosheet units and high Co3+content, Co9S8hollow microplates exhibit remarkable catalytic property for oxygen evolution reaction (OER) with low overpotential of 278 mV to reach a current density of 10 mA cm-2, a low Tafel slope of 53 mV dec-1, and satisfied stability. This construction method of Co9S8hierarchical hollow microplates composed of a nanosheet structure is an effective tactic for promoting OER performance of water splitting electrocatalysts.
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.
authors.forename: Fei-Xiang
authors.initials: FX
authors.lastname: Ma
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.
authors.forename: Cheng-Yan
authors.identifier: http://orcid.org/0000-0002-7835-6635
authors.initials: CY
authors.lastname: Xu
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen Graduate School , Shenzhen 518055, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Du
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.
authors.forename: Pan-Pan
authors.initials: PP
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, China.|MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, China.|School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen Graduate School , Shenzhen 518055, China.
authors.forename: Liang
authors.identifier: http://orcid.org/0000-0001-6159-8972
authors.initials: L
authors.lastname: Zhen
keywords: cobalt sulfide; electrocatalysis; hollow structures; nanosheets; oxygen evolution