Two dimensional voltammetry using an array of channel microband electrodes varying in size from ca. 2 mm to under 1 micron in length, has been used to study the photoreduction of p-bromonitrobenzene. In the dark p-bromonitrobenzene is reduced at - 1.09 V (vs. SCE). On irradiation with strong white light significant photocurrents flowed which were recorded at flow rates from 2 x 10(-3) cm(3) s(-1) to ca. 0.3 cm(3) s(-1) at Various electrode sizes. Mechanistic analysis of these steady-state measurements is shown to unambiguously rule out an ECEE mechanism but suggests instead that an ECE description is the coned one. The analysis is carried out using a WWW based data analysis centre which uses stored working curves to provide best-fit values for the rate constant of the chemical step and for the mean diffusion coefficient of the species involved. [References: 34]
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机译：二维伏安法，使用的阵列微通道电极尺寸从ca左右变化。 2 mm至1微米以下的长度已用于研究对溴硝基苯的光还原。在黑暗中，对溴硝基苯在-1.09 V（vs. SCE）下还原。在强白光照射下，流过大量光电流，记录的流率为2 x 10（-3）cm（3）s（-1）至。在各种电极尺寸下为0.3 cm（3）s（-1）。对这些稳态测量值的机械分析显示出可以明确地排除ECEE机制，但建议将ECE描述作为对策。使用基于WWW的数据分析中心进行分析，该中心使用存储的工作曲线为化学步骤的速率常数和所涉及物质的平均扩散系数提供最佳拟合值。 [参考：34]
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