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- Title
Effective Co<sub>x</sub>S<sub>y</sub> HER Electrocatalysts Fabricated by In‐Situ Sulfuration of a Metal‐Organic Framework.
- Authors
Sun, Xiaowen; Huang, Hui; Wang, Chaopeng; Liu, Yingying; Hu, Tong‐Liang; Bu, Xian‐He
- Abstract
A sulfur and nitrogen containing cobalt metal‐organic framework (Co−MOF) was chosen as a precursor to prepare cobalt sulfides as HER electrocatalysts. Cobalt sulfides with different stoichiometries, CoS1.097, Co9S8, Co9S8/CoS1.097, and Co9S8/CoS1.097/rGO, were obtained through a phase control method and in‐situ sulfuration of the MOF precursor. Co9S8/CoS1.097/rGO shows excellent HER performance, with an overpotential of 50 mV at a current density (j) of 1 mA cm−2 (η0), and 188 mV at a current density of 10 mA cm−2 (η10), stemming from the synergistic effect of Co9S8, CoS1.097, high specific surface area and the nitrogen and sulfur doped carbon matrix. In phase: different cobalt sulfides, CoS1.097, Co9S8, Co9S8/CoS1.097 and Co9S8/CoS1.097/rGO, are obtained following a phase control method and in‐situ sulfuration of a S, N‐containing Co based metal‐organic framework. Co9S8/CoS1.097/rGO shows excellent HER performance of 50 mV at a current density (j) of 1 mA cm−2 (η0), and 188 mV at a current density of 10 mA cm−2 (η10), stemming from the co‐effect of Co9S8, CoS1.097, high specific surface area and the N and S doped C matrix.
- Subjects
SULFUR; NITROGEN; COBALT; METAL sulfides; TRANSITION metals
- Publication
ChemElectroChem, 2018, Vol 5, Issue 23, p3639
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201801238