Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/srep34004
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Funding
- BK21 (Brain Korea 21) plus program through the National Research Foundation (NRF) - Ministry of Education of Korea
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Water splitting, an efficient approach for hydrogen production, is often hindered by unfavorable kinetics of oxygen evolution reaction (OER). In order to reduce the overpotential, noble metal oxides-based electrocatalysts like RuO2 and IrO2 are usually utilized. However, due to their scarcity, the development of cost-effective non-precious OER electrocatalysts with high efficiency and good stability is urgently required. Herein, we report a facile one-step annealing of metal-organic frameworks (MOFs) strategy to synthesize N-doped graphene layers encapsulated NiFe alloy nanoparticles (NiFe@C). Through tuning the nanoparticle size and calcination temperature, NiFe@C with an average size of around 16 nm obtained at 700 degrees C exhibits superior OER performance with an overpotential of only 281 mV at 10 mA cm(-2) and high durability. The facile synthesis method and excellent electrochemical performance show great potential of NiFe@C in replacing the precious metal-based electrocatalysts in the OER.
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