Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 27, Issue 37, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201702513
Keywords
bifunctional materials; Fe-doped Ni2P; nanoarrays; overall water splitting
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Funding
- Natural Science Foundation of China
- Program for Changjiang Scholars and Innovative Research Team in the University
- Fundamental Research Funds for the Central Universities
- Ministry of Finance
- Ministry of Education of P. R. China
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The development of highly efficient bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for improving the efficiency of overall water splitting, but still remains challenging issue. Herein, 3D self-supported Fe-doped Ni2P nanosheet arrays are synthesized on Ni foam by hydrothermal method followed by in situ phosphorization, which serve as bifunctional electrocatalysts for overall water splitting. The as-synthesized (Ni0.33Fe0.67)(2)P with moderate Fe doping shows an outstanding OER performance, which only requires an overpotential of approximate to 230 mV to reach 50 mA cm(-2) and is more efficient than the other Fe incorporated Ni2P electrodes. In addition, the (Ni0.33Fe0.67)(2)P exhibits excellent activity toward HER with a small overpotential of approximate to 214 mV to reach 50 mA cm(-2). Furthermore, an alkaline electrolyzer is measured using (Ni0.33Fe0.67)(2)P electrodes as cathode and anode, respectively, which requires cell voltage of 1.49 V to reach 10 mA cm(-2) as well as shows excellent stability with good nanoarray construction. Such good performance is attributed to the high intrinsic activity and superaerophobic surface property.
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