CAJ | 학술논문

采用热分解方法制备了含SbOx+SnO2中间层的钛基二氧化锰电极.在0.5 mol·L-1 H2SO4溶液中对添加和没有添加SbOx+SnO2中间层的二氧化锰阳极进行了加速电解实验.采用极化曲线和循环伏安曲线测量电极的析氯反应.用循环伏安曲线和电化学阻抗谱来分析电极电解过程中内部结构和表面的变化.结果表明,二氧化锰阳极钝化失效的主要原因是绝缘的TiO2层的生成和变厚.引入中间层可以降低钛基体和活性涂层间的电阻,并且在电解过程中,可以显著延缓接触电阻的升高,从而可以显著提高其寿命.
채용열분해방법제비료함SbOx+SnO2중간층적태기이양화맹전겁.재0.5 mol·L-1 H2SO4용액중대첨가화몰유첨가SbOx+SnO2중간층적이양화맹양겁진행료가속전해실험.채용겁화곡선화순배복안곡선측량전겁적석록반응.용순배복안곡선화전화학조항보래분석전겁전해과정중내부결구화표면적변화.결과표명,이양화맹양겁둔화실효적주요원인시절연적TiO2층적생성화변후.인입중간층가이강저태기체화활성도층간적전조,병차재전해과정중,가이현저연완접촉전조적승고,종이가이현저제고기수명.
SbOx+SnO2 were prepared by thermal decomposition as intermediate layer of Ti based MnO2 anode.investigated by using accelerated electrolysis. Polarization curves and cyclic voltammetric curves (CVs) were utilized to analyze Cl2 evolution reaction (CER) of the oxide electrodes. Cyclic voltammetric curves and electrochemical impedance spectroscopy (ELS) were u tilized with the aim of obtaining detailed information related to the changes of the inner structure during the electrolysis. The results indicated that the main reason for the deactivation of MnO2 anodes was the passivation derived from the increase of the thickness of the insulating TiO2 layer. With the introduction of intermediate layer, the resistance between Ti base and active coating was lowered and the increase of resistance during the electrolysis was postponed dramatically, so the service lives were improved remarkably.