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

Citation data:

Nanoscale, ISSN: 2040-3372, Vol: 9, Issue: 40, Page: 15397-15406

Publication Year:
2017
Captures 4
Readers 4
Citations 2
Citation Indexes 2
Repository URL:
http://pubs.rsc.org/en/Content/ArticleLanding/2017/NR/C7NR04327A#!divAbstract
PMID:
28975945
DOI:
10.1039/c7nr04327a
Author(s):
Kim, Jun; Jin, Haneul; Oh, Aram; Baik, Hionsuck; Joo, Sang Hoon; Lee, Kwangyeol
Publisher(s):
Royal Society of Chemistry (RSC); The Royal Society of Chemistry
Tags:
Materials Science
article description
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 (CoNiS) octahedral nanocages. The sulfidation of CoO octahedral nanoparticles generates CoO@CoS core-shell octahedra, and the in situ etching of the CoO core and annealing yield CoS (pentlandite) octahedral nanocages (ONC). The addition of a Ni precursor during the etching/annealing process of CoO@CoS core-shell octahedra progressively yields hollow ONC structures of CoNiS, NiS, NiS/β-NiS, and NiS/β-NiS via cation exchange reactions. Mixed cobalt/nickel sulphide, CoNiS ONC, shows superior oxygen evolution reaction activity to monometallic sulphide ONC structures, demonstrating the synergy between different metal species.