The structure change and failure behavior of Ti/SnO 2+Sb 2O 3/PbO 2 anodes were studied during the electrolysis process in 1.0 mol·L -1 H 2SO 4 solution.The morphology,microstructure and the electrochemical behav...The structure change and failure behavior of Ti/SnO 2+Sb 2O 3/PbO 2 anodes were studied during the electrolysis process in 1.0 mol·L -1 H 2SO 4 solution.The morphology,microstructure and the electrochemical behavior of the anodes in the different electrolysis processes were examined by means of XRD,SEM,CV and EIS.The variation of cell potential went through three stages:“instability”,“stability”and“rapid rising”in the whole electrolysis process.The morphology,microstructure and the electrochemical behavior of the anodes changed obviously in these stages.In the later stage of the electrolysis process,the passivation film of TiO 2 between the Ti substrate and the oxide coating was formed and PbO 2 coating peeled from the electrode,which caused the inactivation of electrodes.展开更多
Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 electrodes as cat...Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 electrodes as cathode in 0.5 mol/L H2SO4 solution was investigated with cyclic voltammetry. It was found that the electrocatalytic activity of the Ti/TiO2 electrodes was affected by the structure and morphology of the Ti/TiO2 electrodes, in other words, was affected by the calcination conditions of preparing the electrodes. The value of q*ln was considerably larger than that of q*out,which means that the 'inner' active surface area was much larger than the 'outer' active surface area, and
'inner' active surface played a main role in the electrocatalytic activity of the Ti/TiO2 electrodes.展开更多
The Ti/SnO2+Sb2O3/PbO2 anode with SnO2+Sb2O3 intermediate layer obtained by the polymeric precursor method (PPM) and with the conventional route was studied. The morphology and microstructure of SnO2+Sb2O3 intermediat...The Ti/SnO2+Sb2O3/PbO2 anode with SnO2+Sb2O3 intermediate layer obtained by the polymeric precursor method (PPM) and with the conventional route was studied. The morphology and microstructure of SnO2+Sb2O3 intermediate layer derived from different precursors and the top PbO2 active layer were examined by means of ESEM and XRD. The lifetime and electrocatalytic activity of the anode were also assessed by the cyclic voltammetry and accelerated lifetime test in 1.0 mol/L H2SO4 solution. It was found that precursor solvents affected lifetime, microstructure and morphology of the anode, and had little influence on electrocatalysis activity of the electrodes. The accelerated lifetime of Ti/SnO2+Sb2O3/PbO2 anode with intermediate layer prepared by PPM was 29.5 h in 1.0 mol/L H2SO4 solution, which was respectively about four times and twice that of the anode prepared with ethylene glycol and ethanol. After the anode was subjected to thermal corrosion, the lifetime still reached 27 h in contrast to the others.展开更多
文摘The structure change and failure behavior of Ti/SnO 2+Sb 2O 3/PbO 2 anodes were studied during the electrolysis process in 1.0 mol·L -1 H 2SO 4 solution.The morphology,microstructure and the electrochemical behavior of the anodes in the different electrolysis processes were examined by means of XRD,SEM,CV and EIS.The variation of cell potential went through three stages:“instability”,“stability”and“rapid rising”in the whole electrolysis process.The morphology,microstructure and the electrochemical behavior of the anodes changed obviously in these stages.In the later stage of the electrolysis process,the passivation film of TiO 2 between the Ti substrate and the oxide coating was formed and PbO 2 coating peeled from the electrode,which caused the inactivation of electrodes.
基金Supported by the National Natural Science Foundation of China(No.20176047)Supported by the Natural Science Foundation of the Education Department of Jiangsu Province (No.03KJB530164)
文摘Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 electrodes as cathode in 0.5 mol/L H2SO4 solution was investigated with cyclic voltammetry. It was found that the electrocatalytic activity of the Ti/TiO2 electrodes was affected by the structure and morphology of the Ti/TiO2 electrodes, in other words, was affected by the calcination conditions of preparing the electrodes. The value of q*ln was considerably larger than that of q*out,which means that the 'inner' active surface area was much larger than the 'outer' active surface area, and
'inner' active surface played a main role in the electrocatalytic activity of the Ti/TiO2 electrodes.
基金Supported by the National Natural Science Foundation of China (No. 20176047)
文摘The Ti/SnO2+Sb2O3/PbO2 anode with SnO2+Sb2O3 intermediate layer obtained by the polymeric precursor method (PPM) and with the conventional route was studied. The morphology and microstructure of SnO2+Sb2O3 intermediate layer derived from different precursors and the top PbO2 active layer were examined by means of ESEM and XRD. The lifetime and electrocatalytic activity of the anode were also assessed by the cyclic voltammetry and accelerated lifetime test in 1.0 mol/L H2SO4 solution. It was found that precursor solvents affected lifetime, microstructure and morphology of the anode, and had little influence on electrocatalysis activity of the electrodes. The accelerated lifetime of Ti/SnO2+Sb2O3/PbO2 anode with intermediate layer prepared by PPM was 29.5 h in 1.0 mol/L H2SO4 solution, which was respectively about four times and twice that of the anode prepared with ethylene glycol and ethanol. After the anode was subjected to thermal corrosion, the lifetime still reached 27 h in contrast to the others.
