|Kinetic investigation of vanadium (V)/(IV) redox couple on electrochemically oxidized graphite electrodes|
|Wang, Wenjun; Wei, Zengfu; Su, Wei; Fan, Xinzhuang; Liu, Jianguo; Yan, Chuanwei; Zeng, Chaoliu; Fan, XZ; Zeng, CL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
|摘要||The morphology, surface composition, wettability and the kinetic parameters of the electrochemically oxidized graphite electrodes obtained under different anodic polarization conditions have been examined by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), contact angle measurements, steady-state polarization and cyclic voltammetry (CV) tests, with an attempt to investigate the inherent correlation between the physicochemical properties and the kinetic characteristics for carbon electrodes used in an all-vanadium redox flow battery (VRFB). When the anodic polarization potential raises up to 1.8 V vs. SCE, the anodic corrosion of the graphite might happen and a large number of oxygen-containing functional groups generate. The VO2+/VO2+ redox reaction can be facilitated and the reaction reversibility tends to become better with the increasing anodic potential, possibly owing to the increased surface oxides and the resulting improved wettability of the electrode. Based on this, a real reaction kinetic equation for the oxidation of VO2+ has been obtained on the electrode polarized at 1.8 V vs. SCE and it can be also well used to predict the polarization behavior of the oxidized electrode in vanadium (IV) acidic solutions. (C) 2016 Elsevier Ltd. All rights reserved.|
; fan, xinzhuang
; liu, jianguo
; yan, chuanwei
; zeng, chaoliu] chinese acad sci, inst met res, shenyang 110016, peoples r china
; [wei, zengfu
; su, wei] guangdong power grid co ltd, elect power res inst, guangzhou 510080, guangdong, peoples r china
Electrochemically Oxidized Graphite Electrode
Oxygen-containing Functional Groups
|资助者||National Basic Research Program of China [2010CB227203]; Natural Science Foundation of Liaoning Province [O4F0A111A7]
|通讯作者||Fan, XZ; Zeng, CL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.|
Wang, Wenjun,Wei, Zengfu,Su, Wei,et al. Kinetic investigation of vanadium (V)/(IV) redox couple on electrochemically oxidized graphite electrodes[J]. ELECTROCHIMICA ACTA,2016,205:102-112.
Wang, Wenjun.,Wei, Zengfu.,Su, Wei.,Fan, Xinzhuang.,Liu, Jianguo.,...&Zeng, CL .(2016).Kinetic investigation of vanadium (V)/(IV) redox couple on electrochemically oxidized graphite electrodes.ELECTROCHIMICA ACTA,205,102-112.
Wang, Wenjun,et al."Kinetic investigation of vanadium (V)/(IV) redox couple on electrochemically oxidized graphite electrodes".ELECTROCHIMICA ACTA 205(2016):102-112.