Phase controllable fabrication of zinc cobalt sulfide hollow polyhedra as high-performance electrocatalysts for the hydrogen evolution reaction

Structure and phase modulations allow the development of highly active, cost-effective and stable electrocatalysts for the hydrogen evolution reaction (HER) but are rather challenging. In this paper, Zn-Co-S hollow/porous polyhedra with controllable phases were fabricated via solvent-based sulfidati...

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Bibliographic Details
Published in:Nanoscale 2018-01, Vol.10 (4), p.1774-1778
Main Authors: Zhang, Bowei, Yang, Guang, Li, Chaojiang, Huang, Kang, Wu, Junsheng, Hao, Shiji, Feng, Jianyong, Peng, Dongdong, Huang, Yizhong
Format: Article
Language:English
Subjects:
Annealing
Cobalt sulfide
Electrocatalysts
Hydrogen evolution reactions
Kirkendall effect
Polyhedra
Sulfidation
Zinc
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Summary:Structure and phase modulations allow the development of highly active, cost-effective and stable electrocatalysts for the hydrogen evolution reaction (HER) but are rather challenging. In this paper, Zn-Co-S hollow/porous polyhedra with controllable phases were fabricated via solvent-based sulfidation at room temperature followed by thermal annealing. The obtained hollow structure Zn-Co-S-300 with an amorphous phase exhibits excellent electrocatalytic HER activity, which is higher than crystalline Zn-Co sulfides annealed at a higher temperature. Zn-Co-S-300 also shows a long-term working stability (91.7% current density retention over 10 hours) in alkaline media. This work provides a feasible approach for the fabrication of homogeneous ternary transition metal sulfide (TMS) electrocatalysts via the Kirkendall effect towards high-efficiency HER applications.
ISSN:2040-3364
2040-3372
DOI:10.1039/c7nr08097b