We report on the structural and electrochemical properties of a heterogeneous-homogeneous assembly composed of molecular cobaloxime catalysts immobilized onto graphite electrodes via an intervening polyvinylpyridine surface coating. When these modified electrodes are immersed in an organic solvent (propylene carbonate containing 0.1 M tetrabutylammonium perchlorate as a supporting electrolyte) or basic aqueous solutions (0.1 M NaOH), cyclic voltammetry measurements enable determination of the Co III/II peak potentials and Co II/I midpoint potentials of cobaloximes embedded within the polymeric architectures. Additionally, voltammetry measurements recorded using pH neutral aqueous solutions (0.1 M phosphate buffer) confirm the immobilized cobaloximes remain catalytically active for hydrogen production and operate at a turnover frequency of 1.6 s −1 when polarized at –0.35 V vs the H + /H 2 equilibrium potential. Waveform analysis o...

中文翻译：

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有机和水性溶剂中含钴钴肟的聚合体的电化学

我们报告了由分子钴肟催化剂通过介入聚乙烯基吡啶表面涂层固定在石墨电极上的异质-均相组装的结构和电化学性能。将这些修饰电极浸入有机溶剂（含0.1 M高氯酸四丁基铵作为支持电解质的碳酸亚丙酯）或碱性水溶液（0.1 M NaOH）中时，循环伏安法测量可确定Co III / II峰值电势和Co II /我在聚合物结构中嵌入了钴肟的中点电位。此外，使用pH中性水溶液（0.1 M磷酸盐缓冲液）记录的伏安法测量结果证实，固定化钴肟在产氢方面仍具有催化活性，并以1的周转频率运行。在–0.35 V极化时，相对于H + / H 2平衡电势，为6 s -1。波形分析仪