Pontifical Catholic University of Puerto Rico, Ponce, Puerto Rico.
Langmuir. 2010 Feb 2;26(3):2124-9. doi: 10.1021/la902569z.
The electrochemical reactivity of hydroquinone-derived, catechol-derived and benzene-derived adlayers is compared at Pt(111) single-crystal surfaces (i) under stagnant hanging meniscus (HM) configuration and (ii) under hydrodynamic conditions imposed by combining the HM configuration with the rotating disk electrode (RDE) that merge in the so-called HMRDE technique. For the three cases studied, the results suggest that reductive desorption of the adlayers can be accomplished in aqueous 0.5 M H(2)SO(4) solutions within the time frame of a single cathodic scan, i.e. the first half of a single CV experiment. The results highlight the simplicity of exploiting the hydrodynamic conditions imposed by RDE as a convenient electroanalytical strategy to elucidate controversies regarding whether desorption takes place or not during electrode processes studied under the HM configuration.
在 Pt(111)单晶表面上，比较了对苯二酚衍生、邻苯二酚衍生和苯衍生的吸附层的电化学反应活性（i）在静止悬滴（HM）配置下，和（ii）在由 HM 配置与旋转圆盘电极（RDE）组合施加的动力学条件下，这两种条件在所谓的 HMRDE 技术中合并。对于所研究的三种情况，结果表明，在 0.5 M H(2)SO(4)水溶液中，可以在单个阴极扫描的时间范围内完成吸附层的还原解吸，即在单个 CV 实验的前半部分。结果突出了利用 RDE 施加的动力学条件作为一种方便的电分析策略的简单性，以阐明在 HM 配置下研究的电极过程中是否发生解吸的争议。
