Polymeric Metal Salen‐Type Complexes as Catalysts for Photoelectrocatalytic Hydrogen Peroxide Production,ChemElectroChem

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Polymeric Metal Salen‐Type Complexes as Catalysts for Photoelectrocatalytic Hydrogen Peroxide Production
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-08-30 , DOI: 10.1002/celc.201800846
Alexander S. Konev ₁ , Mikhail Yu. Kayumov ₁ , Mikhail P. Karushev ₁ , Yuliia V. Novoselova ₁ , Daniil A. Lukyanov ₁ , Elena V. Alekseeva ₁ , Oleg V. Levin ₁

Affiliation

Electroactive and conductive polymers based on transition metal complexes with salen‐type ligands are of interest as potential materials for energy storage and solar energy conversion. The easily tunable structure of monomers allows to modify polymer properties by changing either the central metal atom or the ligand substituents. Herein we report the photoelectrocatalytic activity of [M^II(L)]_n complexes, where M is Ni, Cu or Pd, and L is a tetradentate N,N,O,O salen‐type ligand, in the reduction of molecular oxygen to hydrogen peroxide in water solutions on polymer‐coated ITO electrodes. The photocathodic current at 0 V vs. Ag/AgCl is pH‐dependent, reaching maximum at pH 1 and dropping almost to zero at pH 12. Hydrogen peroxide production is almost quantitative (97 % efficiency measured in 1‐compartment cell). Maximal photocurrent and H₂O₂ concentrations achieved comprise 23 μA/cm² and 1.3×10⁻³ M respectively.

中文翻译：

聚合金属Salen型络合物作为光电化学催化过氧化氢生产的催化剂

基于过渡金属配合物与Salen型配体的电活性和导电聚合物作为潜在的储能和太阳能转化材料受到关注。单体易于调节的结构允许通过改变中心金属原子或配体取代基来改变聚合物的性能。在此，我们报道了[M ^II（L）] _n配合物的光电催化活性，其中M为Ni，Cu或Pd，L为四齿N，N，O，O salen型配体，可将分子氧还原为涂有聚合物的ITO电极上的水溶液中的过氧化氢。在0 V，相对于银/氯化银的光电阴极电流的pH依赖性，在达到最大p H 1和在几乎下降到零pH 12.过氧化氢的产生几乎是定量的（在1隔室的电池中测得的效率为97％）。达到的最大光电流和H ₂ O ₂浓度分别为23μA/ cm ²和1.3×10 ^-3M。

更新日期：2018-08-30

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