Xiaowen Sun1, Hui Huang1, Chaopeng Wang1, Yingying Liu1, Tong‐Liang Hu2,1, Xian‐He Bu3,2,1
1School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China
2Key Laboratory of Advanced Energy Material Chemistry (Ministry of Education), Nankai University, Tianjin, 300071 P. R. China
3Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
Tóm tắt
AbstractA 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.
