| Autor: |
Zhang, Yongqi, Xia, Xinhui, Cao, Xun, Zhang, Bowei, Tiep, Nguyen Huy, He, Haiyong, Chen, Shi, Huang, Yizhong, Fan, Hong Jin |
| Předmět: |
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| Zdroj: |
Advanced Energy Materials; 8/9/2017, Vol. 7 Issue 15, pn/a-N.PAG, 8p |
| Abstrakt: |
By employing in situ reduction of metal precursor and metal-assisted carbon etching process, this study achieves a series of ultrafine transition metal-based nanoparticles (Ni-Fe, Ni-Mo) embedded in N-doped carbon, which are found efficient catalysts for electrolytic water splitting. The as-prepared hybrid materials demonstrate outstanding catalytic activities as non-noble metal electrodes rendered by the synergistic effect of bimetal elements and N-dopants, the improved electrical conductivity, and hydrophilism. Ni/Mo2C@N-doped porous carbon (NiMo-polyvinylpyrrolidone (PVP)) and NiFe@N-doped carbon (NiFe-PVP) produce low overpotentials of 130 and 297 mV at a current density of 10 mA cm−2 as catalysts for hydrogen evolution reaction and oxygen evolution reaction, respectively. In addition, these binder-free electrodes show long-term stability. Overall water splitting is also demonstrated based on the couple of NiMo-PVP||NiFe-PVP catalyzer. This represents a simple and effective synthesis method toward a new type of nanometal-carbon hybrid electrodes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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