Water Oxidation by an Electropolymerized Catalyst on Derivatized Mesoporous Metal Oxide Electrodes
Water Oxidation by an Electropolymerized Catalyst on Derivatized Mesoporous Metal Oxide Electrodes
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DOI：
10.1021/ja502464s
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发表时间：
2014-05-07
影响因子：
15
通讯作者：
Meyer, Thomas J.
中科院分区：
文献类型：
--
作者：
Ashford, Dennis L.;Lapides, Alexander M.;Meyer, Thomas J.
本文描述了一种通用的电聚合/电聚策略，用于在金属氧化物电极上制备空间控制的多组分薄膜和表面组件，这些薄膜和表面组件具有光收集发色团和水氧化催化剂，用于染料敏化光电合成电池（DSPECs）。生色团/催化剂的比例受还原性电化学循环次数的控制。聚合物膜对水氧化的催化速率常数与金属氧化物电极上磷酸化分子催化剂的催化速率常数相似，表明催化剂的物理性质在聚合物膜中没有明显改变。控制电位电解显示持续的水氧化超过多个小时，没有减少催化电流。
A general electropolymerization/electro-oligomerization strategy is described for preparing spatially controlled, multicomponent films and surface assemblies having both light harvesting chromophores and water oxidation catalysts on metal oxide electrodes for applications in dye-sensitized photoelectrosynthesis cells (DSPECs). The chromophore/catalyst ratio is controlled by the number of reductive electrochemical cycles. Catalytic rate constants for water oxidation by the polymer films are similar to those for the phosphonated molecular catalyst on metal oxide electrodes, indicating that the physical properties of the catalysts are not significantly altered in the polymer films. Controlled potential electrolysis shows sustained water oxidation over multiple hours with no decrease in the catalytic current.