Yonghong Lu
Ocean University of China
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Publication
Featured researches published by Yonghong Lu.
Journal of Materials Chemistry | 2011
Xinzhuang Fan; Yonghong Lu; Haibo Xu; Xiangfeng Kong; Jia Wang
Reversible redox reactions on the oxygen-containing functional groups of an electrochemically modified graphite electrode (GE) by recurrent galvanic pulses in 2.3 M H2SO4 solution are investigated. The crystal morphology, surface composition and electrochemical performance of electrochemically modified GE are monitored by scanning electron microscopy, Raman spectroscopy, nitrogen adsorption, Fourier transform infrared spectroscopy, thermogravimetry, Boehms titration, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry (CV) tests. After the electrochemical modification, the material shows a turbostratic structure with many small domains consisting of multi-layered graphene sheets in parallel, and presents a high specific capacitance of 179.7 F g−1, as well as a good stability after 10000 CV cycles. The high specific capacitance is mainly attributed to the continuous reversible redox reactions of the active groups among the hydroxyl (reduced state), carbonyl (half-oxidized state) and carboxyl (fully oxidized state) groups; a redox mechanism is obtained consequently. The amount of active groups on the modified GE surface is about 848–875 μmol g−1 by the Boehm titration. Their contribution to the pseudo-capacitance according to the redox mechanism is about 130–140 F g−1, which is consistent with the results of electrochemical measurements.
Electrochimica Acta | 2015
Guangsen Xia; Yonghong Lu; Haibo Xu
Electrochimica Acta | 2009
Jing Jiang; Jia Wang; Yonghong Lu; Jie-zhen Hu
Electrochimica Acta | 2009
Yonghong Lu; Haibo Xu; Jia Wang; Xiangfeng Kong
Separation and Purification Technology | 2015
Guangsen Xia; Yonghong Lu; Haibo Xu
Corrosion Science | 2010
Wei Wang; Yonghong Lu; Yan Zou; Xia Zhang; Jia Wang
Carbon | 2010
Haibo Xu; Xinzhuang Fan; Yonghong Lu; Lian Zhong; Xiangfeng Kong; Jia Wang
Clean-soil Air Water | 2015
Guangsen Xia; Yonghong Lu; Xueli Gao; Congjie Gao; Haibo Xu
Journal of Applied Electrochemistry | 2010
Hai-Bo Xu; Yonghong Lu; Chun-Hu Li; Jie-Zhen Hu
Physical Chemistry Chemical Physics | 2015
Haibo Xu; Guangsen Xia; Haining Liu; Shuwei Xia; Yonghong Lu