Hydrogen evolution reaction of one 2D cobalt coordination polymer with coordinated sulfate ion
| Autor: | Yi Zheng, Xi Yang, Ling Qin, Qing Hu, Jin-Liang Liu, Ming-Dao Zhang, Qi-Ming Zheng |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Coordination polymer Inorganic chemistry chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 01 natural sciences law.invention Inorganic Chemistry chemistry.chemical_compound law Materials Chemistry Calcination Physical and Theoretical Chemistry Tafel equation Sulfuric acid 021001 nanoscience & nanotechnology Condensed Matter Physics Sulfur 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Hydrogen fuel Ceramics and Composites 0210 nano-technology Cobalt |
| Zdroj: | Journal of Solid State Chemistry. 299:122191 |
| ISSN: | 0022-4596 |
| Popis: | At present, the shortage of energy is becoming more serious. As a new energy source, hydrogen energy is expected to solve the problem of energy shortage. We considered that doping sulfur may lead to better electrocatalytic hydrogen evolution (HER) performance of the coordination polymers. Therefore, we added sulfuric acid to adjust pH and expected to introduce sulfate ions into the structure during the synthesis. Finally, one cobalt-based coordination polymer (CP) was synthesized, namely {[Co4(bibp)4(SO42−)4(H2O)8]}n (1) (bibp = 4,4′-bisimidazolylbiphenyl). As expected, this synergistic effect of cobalt, carbon and sulfur in the structure may enable compound 1 after calcination at high temperature to have better electrocatalytic hydrogen evolution performance. It has a low onset potential and Tafel slope of −137mV and 115 mV dec−1, respectively, and an overpotential of −252mV at a current density of 10 mA cm−2. And we also found that the material also has low resistivity and good stability with a good activity after 8 h of cycling. |
| Databáze: | OpenAIRE |
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