In Situ Engineering of Double-Phase Interface in Mo/Mo2C Heteronanosheets for Boosted Hydrogen Evolution Reaction
| Autor: | Zhao Liu, Jiawei Shi, Ligang Feng, Jing Li, Nian-Tzu Suen, Xinrong Lei, Hansong Cheng, Yunjie Huang, Weiwei Cai, Jie Xiong, Zehui Yang, Guoxiao Xu, Liang Huang, Xinlei Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
In situ
Electrolysis Materials science Renewable Energy Sustainability and the Environment Carbonization Energy Engineering and Power Technology 02 engineering and technology Electron Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis Fuel Technology Chemical engineering Chemistry (miscellaneous) law Materials Chemistry Electron configuration 0210 nano-technology Current density |
| Zdroj: | ACS Energy Letters. 3:341-348 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.7b01180 |
| Popis: | Two-dimensional Mo/Mo2C heteronanosheets (Mo/Mo2C-HNS) were successfully prepared via a NaCl template-assisted synthesis route followed by a controllable simultaneous reduction and carbonization of MoO3 nanosheets for efficient hydrogen evolution reaction (HER) catalysis under both acidic and alkaline conditions. The Mo species in the atomically thin Mo/Mo2C-HNS not only guarantees the rapid transport of electrons but also optimizes the electronic configuration of β-Mo2C. Besides, the abundant Mo/β-Mo2C heterointerfaces in nanodimension afford large numbers of additional heterogeneous catalytic sites. HER electrocatalytic performance with overpotential of merely 89 mV to drive a current density of 10 mA/cm2 in 0.5 M H2SO4 is therefore achieved. Strikingly, stable chronoamperometric electrolysis for 20 h and also an impressive cycling stability with negligible overpotential decay over 4000 sweeps demonstrate its considerable durability in an acidic environment. These findings highlight the promising potent... |
| Databáze: | OpenAIRE |
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