Wenhua Liu
Central South University
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Featured researches published by Wenhua Liu.
RSC Advances | 2016
Faqi Zhan; Yahui Yang; Wenzhang Li; Jie Li; Wenhua Liu; Yaomin Li; Qiyuan Chen
In this work, DyVO4/WO3 heterojunction plate arrays were first fabricated on FTO using a hydrothermal method for WO3 vertical plate arrays and a dipping–annealing process for the deposition of DyVO4 nanoparticles. The samples were characterized by various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Photoelectrochemical activities were investigated by linear sweep voltammetry (LSV) and incident photon to current conversion efficiency (IPCE). The DyVO4/WO3 heterojunction electrode exhibited a maximum photocurrent density of 0.78 mA cm−2 at +1.2 V (vs. Ag/AgCl), while the photocurrent density of pure WO3 was just 0.49 mA cm−2 under illumination. And the highest IPCE value increased from 27.4% to 54.1% after the DyVO4 nanoparticle deposition. The enhanced PEC performance was attributed to the longer electron lifetime, increased carrier density and high charge separation efficiency at the interface of heterojunction, which were confirmed by electrochemical impedance spectroscopy (EIS) and Mott–Schottky analysis. The study demonstrates that metal orthovanadates may be good heterojunction candidates to couple with WO3 to provide promising photoanodes for water splitting.
Transactions of Nonferrous Metals Society of China | 2016
Yahui Yang; Renrui Xie; Hang Li; Canjun Liu; Wenhua Liu; Faqi Zhan
Abstract A novel WO 3– x /TiO 2 film as photoanode was synthesized for photoelectrocatalytic (PEC) reduction of CO 2 into formic acid (HCOOH). The films prepared by doctor blade method were characterized with X-ray diffractometer (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The existence of oxygen vacancies in the WO 3– x was confirmed with an X-ray photoelectron spectroscopy (XPS), and the accurate oxygen index was determined by a modified potentiometric titrimetry method. After 3 h of photoelectrocatalytic reduction, the formic acid yield of the WO 3– x /TiO 2 film is 872 nmol/cm 2 , which is 1.83 times that of the WO 3 /TiO 2 film. The results of PEC performance demonstrate that the introduction of WO 3– x nanoparticles can improve the charge transfer performance so as to enhance the performance of PEC reduction of CO 2 into formic acid.
Journal of Power Sources | 2016
Faqi Zhan; Jie Li; Wenzhang Li; Yahui Yang; Wenhua Liu; Yaomin Li
Journal of Solid State Electrochemistry | 2017
Yahui Yang; Faqi Zhan; Hang Li; Wenhua Liu; Sha Yu
International Journal of Hydrogen Energy | 2016
Faqi Zhan; Wenhua Liu; Wenzhang Li; Jie Li; Yahui Yang; Yaomin Li; Qiyuan Chen
International Journal of Hydrogen Energy | 2018
Yang Liu; Yahui Yang; Qiong Liu; Haizhou He; Wenhua Liu; Dedong Meng; Yaomin Li; Wenzhang Li; Jie Li
Journal of Materials Science: Materials in Electronics | 2017
Faqi Zhan; Wenhua Liu; Wenzhang Li; Jie Li; Yahui Yang; Qiong Liu; Yaomin Li; Xinde Tang
International Journal of Hydrogen Energy | 2018
Wenhua Liu; Yahui Yang; Faqi Zhan; Dongwei Li; Yaomin Li; Xinde Tang; Wenzhang Li; Jie Li
Applied Surface Science | 2018
Faqi Zhan; Wenhua Liu; Hang Li; Yahui Yang; Min Wang
ACS Sustainable Chemistry & Engineering | 2018
Faqi Zhan; Yahui Yang; Wenhua Liu; Keke Wang; Wenzhang Li; Jie Li