Journal
CRYSTENGCOMM
Volume 15, Issue 25, Pages 5087-5092Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ce40251g
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This work presents a facile and general solvothermal approach to prepare hierarchical cobalt sulfides (ComSn) microflowers, which are composed of curved nanosheets. The homogeneous phases of Co9S8, Co3S4 and Co1-xS could be obtained just by adjusting the molar ratio of cobalt acetate to thiourea. The structure and morphology of the as-prepared cobalt sulfides were investigated by powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM, X-ray photoelectron spectroscopy and N-2-sorption measurements. The possible growth process was discussed on the basis of time-dependent experimental results. The ComSn materials exhibited great electrocatalytic activities towards both oxygen reduction and oxygen evolution reactions, making them a kind of promising electrode materials for fuel cells and batteries.
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