Abstract The oxidation of dopamine (DA) on a boron-doped diamond (BDD) electrode was investigated using in situ attenuated total reflection infrared spectroscopy (ATR-IR) and infrared reflection absorption spectroscopy (IRAS). Voltammogram showed multiple anodic/cathodic peaks for the oxidation/reduction of DA and its oxidized derivatives on the BDD electrode. The oxidation/reduction species on the surface and in solution were assigned using ATR-IR and IRAS, respectively. The anodic oxidation of DA promoted polymerization, and the polymerized DA (PDA) was continuously deposited on BDD without being reduced by potential cycles, which resulted in the irreversible behavior of the voltammogram. A decrease in the oxidation current of DA by potential cycles was due to the deposition of PDA. Some intermediate quinone species, such as dopaminequinone and dopaminechrome, were reversibly reduced to hydroquinone.

中文翻译：

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多晶硼掺杂金刚石电极上多巴胺氧化/还原反应的原位红外光谱

摘要 使用原位衰减全反射红外光谱 (ATR-IR) 和红外反射吸收光谱 (IRAS) 研究了多巴胺 (DA) 在掺硼金刚石 (BDD) 电极上的氧化。伏安图显示了 BDD 电极上 DA 及其氧化衍生物的氧化/还原的多个阳极/阴极峰。表面和溶液中的氧化/还原物质分别使用 ATR-IR 和 IRAS 指定。DA 的阳极氧化促进了聚合，聚合后的 DA (PDA) 连续沉积在 BDD 上而不会被电位循环还原，从而导致伏安图的不可逆行为。电位循环导致 DA 氧化电流的降低是由于 PDA 的沉积。一些中间醌类，