【摘要】 钛基氧化物涂层电极(DSA)由于其对阳极析氯、阳极析氧、有机污染物电化学降解等具有优异的电催化活性而受到研究者的广泛关注,但DSA电极电催化现象背后的一些重要而基础性的问题仍未被人们完全认识。本文针对目前国内外有关DSA电极电催化研究领域的几个研究热点、不足之处,以及尚待深入探究的问题,进行了简要介绍、分析和讨论。DSA电极的电催化活性主要来自于其表面的金属氧化物涂层。本文强调对"氧化物涂层"自身固体物理-化学性能或过程的研究,有助于深入揭示钛基活性氧化物涂层电极电催化现象的微观作用机制和内在本质,并反过来指导人们更加理性地通过设计和优化DSA电极的制备方法和条件,调控表面氧化物涂层的化学组成与结构,进而达到增强钛基涂层电极电催化活性之目的。更多还原

【Abstract】 Titanium anodes coated with transient metal oxides,so-called dimensionally stable anodes(DSA~D○R) have been studied extensively due to their excellent electrocatalytic activity for chlorine and oxygen evolutions and electro-oxidation degradation of toxic organic compounds.But some fundamental and important questions in close relation with the electrocatalysis phenomena of DSA have not been completely understood yet.After a short review of the recent progress of electrocatalysis of DSA,some deficiencies in the related studies are raised and discussed.Since the oxide coating plays an essential role in the electrocatalytic activity of DSA,it is emphasized that the solid state physico-chemical properties(e.g.the electronic structure,potential distribution,charge transfer mechanisms,conductivity,etc.) of the bulk metal oxide coating in DSA electrode need to be further investigated in future studies.Both for understanding the essentiality of the electrocatalysis phenomena of DSA and for improving the electrocatalytic activity of DSA electrode by changing the chemical composition of its oxide coating more rationally,it is desired to establish more correlations of the electrocatalytic activity of DSA electrode with the solid state physico-chemical properties of the oxide coating bulk.更多还原