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Synthesis of compositionally tunable, hollow mixed metal sulphide CoxNiySz octahedral nanocages and their composition-dependent electrocatalytic activities for oxygen evolution reaction

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Title
Synthesis of compositionally tunable, hollow mixed metal sulphide CoxNiySz octahedral nanocages and their composition-dependent electrocatalytic activities for oxygen evolution reaction
Author(s)
Jun Kim; Haneul Jin; Aram Oh; Hionsuck Baik; Sang Hoon Joo; Kwangyeol Lee
Publication Date
2017-10
Journal
NANOSCALE, v.9, no.40, pp.15397 - 15406
Publisher
ROYAL SOC CHEMISTRY
Abstract
Hollow nanostructures such as nanocages and nanoframes can serve as advanced catalysts with their enlarged active surface areas, and hence they have been of widespread interest. Despite the recent progress in the synthesis of this class of nanomaterials, hollow nanostructures with tunable compositions and controlled morphologies have rarely been reported. Here, we report a facile synthetic route to a series of compositionally tunable, hollow mixed metal sulphide (CoxNiySz) octahedral nanocages. The sulfidation of CoO octahedral nanoparticles generates CoO@CoxSy core–shell octahedra, and the in situ etching of the CoO core and annealing yield Co9S8 (pentlandite) octahedral nanocages (ONC). The addition of a Ni precursor during the etching/annealing process of CoO@CoxSy core–shell octahedra progressively yields hollow ONC structures of Co9−xNixS8, Ni9S8, Ni9S8/β-NiS, and Ni3S2/β-NiS via cation exchange reactions. Mixed cobalt/nickel sulphide, Co9−xNixS8 ONC, shows superior oxygen evolution reaction activity to monometallic sulphide ONC structures, demonstrating the synergy between different metal species. This journal is © The Royal Society of Chemistry 2017
URI
https://pr.ibs.re.kr/handle/8788114/4076
DOI
10.1039/C7NR04327A
ISSN
2040-3364
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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