Journal
NANOSCALE
Volume 8, Issue 3, Pages 1390-1400Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr06197k
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Funding
- National Natural Science Foundation of China [21571089, 21201092, 21403097, 51203184, 21501081]
- National Fund for Talent Training in Basic Science of China [J1103307]
- Research Fund for the Doctoral Program of Higher Education [20120211120020]
- Fundamental Research Funds for the Central Universities [Lzujbky-2014-m02, Lzujbky-2015-19, lzujbky-2014-182]
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Water splitting via the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in producing H-2 and O-2 is a very important process in the energy field. Developing an efficient catalyst which can be applied to both HER and OER is crucial. Here, a bifunctional catalyst, CFP/NiCo2O4/Co0.57Ni0.43LMOs, has been successfully fabricated. It exhibits remarkable performance for OER in 0.1 M KOH producing a current density of 10 mA cm(-2) at an overpotential of 0.34 V (1.57 V vs. RHE), better than that of the commercial Ir/C (20%) catalyst. Simultaneously, it also exhibits good catalytic performance for HER in 0.5 M H2SO4 producing a current density of 10 mA cm(-2) at an overpotential of 52 mV and a Tafel slope of 34 mV dec(-1), approaching that of the commercial Pt/C (20%) nanocatalyst. Particularly, CFP/NiCo2O4/Co0.57Ni0.43LMOs present better durability under harsh OER and HER cycling conditions than commercial Ir/C and Pt/C. Furthermore, an H-type electrolyzer was fabricated by applying CFP/NiCo2O4/Co0.57Ni0.43LMOs as the cathode and anode electrocatalyst, which can be driven by a single-cell battery. This bifunctional catalyst will be very promising in overall water splitting.
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