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Effective Co x S y HER Electrocatalysts Fabricated by In‐Situ Sulfuration of a Metal‐Organic Framework
Author(s) -
Sun Xiaowen,
Huang Hui,
Wang Chaopeng,
Liu Yingying,
Hu TongLiang,
Bu XianHe
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801238
Subject(s) - cobalt , overpotential , sulfur , stoichiometry , metal organic framework , nitrogen , current density , metal , chemistry , carbon fibers , inorganic chemistry , materials science , phase (matter) , electrochemistry , electrode , organic chemistry , adsorption , composite number , physics , quantum mechanics , composite material
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, CoS 1.097 , Co 9 S 8 , Co 9 S 8 /CoS 1.097 , and Co 9 S 8 /CoS 1.097 /rGO, were obtained through a phase control method and in‐situ sulfuration of the MOF precursor. Co 9 S 8 /CoS 1.097 /rGO shows excellent HER performance, with an overpotential of 50 mV at a current density (j) of 1 mA cm −2 (η 0 ), and 188 mV at a current density of 10 mA cm −2 (η 10 ), stemming from the synergistic effect of Co 9 S 8 , CoS 1.097 , high specific surface area and the nitrogen and sulfur doped carbon matrix.
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