Pt/Mo2C heteronanosheets for superior hydrogen evolution reaction
| Autor: | Shunfa Zhou, Jing Li, Zhao Liu, Shiji Xue, Konggang Qu, Weiwei Cai, Ying Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Overpotential engineering.material 010402 general chemistry 01 natural sciences law.invention Catalysis law Electrochemistry Hydrogen production Tafel equation Electrolysis Electrolysis of water 021001 nanoscience & nanotechnology 0104 chemical sciences Fuel Technology chemistry Chemical engineering engineering Noble metal 0210 nano-technology Platinum Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 47:317-323 |
| ISSN: | 2095-4956 |
| DOI: | 10.1016/j.jechem.2020.02.005 |
| Popis: | One of the most primary challenges to achieve large-scale hydrogen generation from water electrolysis is the sluggish kinetics and noble metal dependence of cathodic hydrogen evolution reaction (HER). By considering the excellent water dissociation catalytic activity of Mo2C, abundant Pt/Mo2C interfaces were facilely engineered via galvanic replacement (gr) by using Mo/Mo2C nanosheets as self-sacrificed templates to alter the alkaline HER mechanism on Pt based catalyst. The rational designed interface-rich gr-Pt/Mo2C catalyst exhibited excellent activity with the overpotential to drive 10 mA/cm2 current density decreased by 18.5 mV compared with the commercial Pt/C catalyst. 34.3 mV/dec Tafel slope confirms the Volmer-Tafel HER route on gr-Pt/Mo2C in alkaline condition. Platinum utilization is calculated to be improved by 9.7 times by considered the low Pt loading in the gr-Pt/Mo2C catalyst. With its satisfied stability, the scalable gr-Pt/Mo2C catalyst shows promising application potential in industrial electrolysis systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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