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Evidence for the production of hydroxyl radicals at boron-doped diamond electrodes with different sp3/sp2 ratios and its relationship with the anodic oxidation of aniline
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2018-03-15 , DOI: 10.1016/j.elecom.2018.03.007
L. Carolina Espinoza , Adolfo Henríquez , David Contreras , Ricardo Salazar

In this work, the electrochemical production of hydroxyl radicals on boron-doped diamond (BDD) electrodes with different sp3/sp2 ratios was studied, together with the relationship between the level of production of hydroxyl radicals and the degradation and mineralization of aniline, taken as a model organic compound. A higher sp3/sp2 ratio on the BDD surface produces a greater number of hydroxyl radicals, as previously stated; however, for the first time the difference in the production of hydroxyl radicals for different levels of sp2-impurities on BDD surface was established and its importance in determining the nature of the BDD surface (semi-active or inactive) is demonstrated. The results are of great relevance in interpreting the real effect of conductive diamond electrochemical oxidation on the treatment of organic wastes described in the literature.



中文翻译:

具有不同sp 3 / sp 2比的掺硼金刚石电极上羟基自由基产生的证据及其与苯胺的阳极氧化的关系

在这项工作中,研究了在不同sp 3 / sp 2比值的掺硼金刚石(BDD)电极上电化学产生羟基自由基的过程,以及羟基自由基的产生水平与苯胺的降解和矿化之间的关系,作为模型有机化合物。如前所述,BDD表面较高的sp 3 / sp 2比值会产生更多的羟基。但是,对于不同水平的sp 2来说,这是第一次产生羟基自由基的差异。-建立了BDD表面的杂质,并证明了其在确定BDD表面性质(半活性或非活性)中的重要性。该结果与解释文献中描述的导电金刚石电化学氧化对有机废物处理的实际效果具有重要意义。

更新日期:2018-03-15
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