In this paper, we developed a direct way for the study of hydroquinone oxidation through in situ electrochemistry-combined nuclear magnetic resonance (EC-NMR). Electro-polymerization-induced nano-polyaniline film was utilized as the catalyst in the process of electrochemical oxidation of hydroquinone. In situ EC-NMR provides a powerful tool to probe products distribution and reaction rate, which could be useful to investigate electro-catalytic mechanism and evaluate the electro-catalytic capacity. To study the influence of both protic and aprotic media in the electrocatalytic process, we mixed water and dimethylsulfoxide to mimic possible real-life electrochemical environments. The proposed in situ EC-NMR is capable of quantitatively monitoring the generation of products under varied solvent composition and pH values. A positive effect to electro-catalysis capacity is observed when the concentration of DMSO or water is increased from the volume equivalent point, implying that there should be a competition between protic and aprotic media, which can be characterized by EC-NMR technique.

在本文中，我们开发了一种通过原位电化学结合核磁共振（EC-NMR）研究对苯二酚氧化的直接方法。电聚合诱导的纳米聚苯胺薄膜被用作对苯二酚的电化学氧化过程中的催化剂。原位EC-NMR为探测产物的分布和反应速率提供了一个有力的工具，可用于研究电催化机理和评估电催化能力。为了研究质子和非质子介质在电催化过程中的影响，我们将水和二甲基亚砜混合以模拟可能的现实生活中的电化学环境。拟议的原位EC-NMR能够在不同的溶剂组成和pH值下定量监测产物的生成。