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Start Over Author "ZHANG, SHOUREN" Journal applied surface science
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2. RGO modified Ni doped FeOOH for enhanced electrochemical and photoelectrochemical water oxidation

Author

Yan Shen, Zhang Shouren, Baocheng Yang, Xiaofan Zhang, Bingyan Zhang, Hongwei Kang, Kong Weiqian, and Shuangshuang Liu

Subjects
Photocurrent, Tafel equation, Materials science, Graphene, Doping, Oxygen evolution, Oxide, General Physics and Astronomy, 02 engineering and technology, Surfaces and Interfaces, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electrochemistry, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, law.invention, chemistry.chemical_compound, Chemical engineering, chemistry, law, Nanorod, 0210 nano-technology
Abstract

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.

Published
2018

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