期刊
ADVANCED ENERGY MATERIALS
卷 7, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201700220
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资金
- Singapore MOE AcRF Tier 1 [RG98/15, RG117/16]
- CAS/SAFEA International Partnership Program for Creative Research Teams
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.
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