Journal
APPLIED SURFACE SCIENCE
Volume 436, Issue -, Pages 974-980Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2017.12.078
Keywords
Reduced graphene oxide; Ni doped FeOOH; Electrochemical; Photoelectrochemical; Water oxidation
Categories
Funding
- National Natural Science Foundation of China [51602120, 51472102]
- Natural Science Foundation of Education Department of Henan Province [17A430023]
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Ni,Fe-based (oxy) hydroxides have been one of the most active catalysts for the oxygen evolution reaction. In this article, reduced graphene oxide supported Ni doped FeOOH (RGO/Ni:FeOOH) was prepared for electrochemical and photoelectrochemical (PEC) water oxidation. The RGO/Ni: FeOOH exhibited a lower over-potential (260 mV at 10 mA cm(-2)) and smaller Tafel slope (32.3 mV dec(-1)) than that of the FeOOH and Ni: FeOOH. Such significant enhancement is attributed to Ni doping and RGO, which reduce the over-potential, improve the conductivity and enlarge surface areas. Besides, RGO/Ni: FeOOH decorated the TiO2 nanorods (NRs) was also fabricated for photoelectrochemical (PEC) water oxidation, which exhibited a higher photocurrent density and lower onset potential than that of TiO2 NRs the bare under illumination due to the synergistic effect of RGO and Ni: FeOOH. These results demonstrate the RGO/Ni: FeOOH has great promising as a co-catalyst to improve the PEC performance. (C) 2017 Elsevier B.V. All rights reserved.
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