|
| Mesoporous Regulated Co9S8/Ni3S2 Composite Electrode Materials and Electrocatalytic Hydrogen Evolution Performance |
| Author Name | Affiliation | E-mail | | ZHOU Qi | State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China | zhouxq301@sina.com | | LI Xin-Bao | College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China | | | JIAO Sun-Zhi | College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China | |
|
| Abstract: The nano-porous Ni-Co alloy was prepared by rapid solidification and dealloying. After vapor deposition of sulfur and hot hydrogen reduction, nano-porous Co9S8/Ni3S2 composite electrode materials with surface mesoporous were prepared. The results showed that sulfur atoms and Ni-Co alloys formed CoS2/NiS2 composite phases in situ, and after thermal hydrogen reduction, Co9S8/Ni3S2 composite phase with a low sulfur atom ratio was formed. This thermal hydrogen reduction process not only increases the electron density around the Co9S8/Ni3S2 elements, but also modulates heterogeneous interface with mesoporous structure, which improves the electron transport capacity and increases the active surface area. Compared with other Ni and Co sulfides that were prepared under the same condition, Co9S8/Ni3S2 had better hydrogen evolution reaction (HER) activity. When current density was 50 mA·cm-2, the hydrogen evolution overpotential of Co9S8/Ni3S2 was 234 mV, and Tafel slope was 106 mV·dec-1. After stabilization test, the voltage changed only 14 mV. |
| Keywords: nano structure composite electrode mesoporous structure electrochemistry hydrogen evolution reaction |
| Hits: 2262 |
| Download times: 365 |
| ZHOU Qi,LI Xin-Bao,JIAO Sun-Zhi.Mesoporous Regulated Co9S8/Ni3S2 Composite Electrode Materials and Electrocatalytic Hydrogen Evolution Performance[J].Chinese Journal of Inorganic Chemistry,2021,37(11):1970-1980. |
| View Full Text View/Add Comment Download reader |
|
|
|
|
|
|
|
|
