title: Single-unit-cell thick Co9S8nanosheets from preassembled Co14nanoclusters.
abstract: Ultrathin two-dimensional (2D) nanomaterials composed of abundant and inexpensive 3d metal chalcogenides are competitive candidates for practical electrocatalysts for the oxygen evolution reaction (OER). However, the bottom-up synthesis of atomically thick nanosheets is difficult for materials with inherent non-layered host crystals. Here, we demonstrate the preparation of single-unit-cell thick Co9S8nanosheets from preassembled Co14nanoclusters (NCs) by virtue of the flexibility of NC self-assembly in colloidal solution. Due to their free-standing properties, the NC self-assembled architectures are capable of bearing sulfurization at elevated temperatures, thus producing ultrathin Co9S8nanosheets. The nanosheets exhibit an OER overpotential as low as 0.27 V at 10 mA cm-2in 0.1 M KOH, which is comparable to the performance of the best Co-based OER electrocatalysts.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Zhennan
authors.initials: Z
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Haoyang
authors.initials: H
authors.lastname: Zou
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Tingting
authors.initials: T
authors.lastname: Li
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Ziyi
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Huiwen
authors.initials: H
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. hao_zhang@jlu.edu.cn.
authors.forename: Bai
authors.initials: B
authors.lastname: Yang
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013455:Sulfur / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003035:Cobalt; D013455:Sulfur