Polymeric Metal Salen‐Type Complexes as Catalysts for Photoelectrocatalytic Hydrogen Peroxide Production. Issue 21 (30th August 2018)

• Record Type: Journal Article
• Authors: Konev, Alexander S.; Kayumov, Mikhail Yu.; Karushev, Mikhail P.; Novoselova, Yuliia V.; Lukyanov, Daniil A.; Alekseeva, Elena V.; Levin, Oleg V.
• Is Part Of: ChemElectroChem. Volume 5:Issue 21(2018)
• Page Start: 3138
• Page End: 3142
• Publication Date: 2018-08-30
• Subjects: metal salen complexes -- peroxides -- photocatalysis -- photoelectrochemistry -- polymers; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201800846
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: 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 p H 1 and dropping almost to zero at p H 12. Hydrogen peroxide production is almost quantitative (97 % efficiency measured in 1‐compartment cell). Maximal photocurrent and H2 O2 concentrations achieved comprise 23 μA/cm 2 and 1.3×10 −3 M respectively. Abstract : Energy conversion : Ni‐salen complexes are synthesised and characterised as electrocatalysts for solar energy conversion. In experiments for solar energy conversion, it is shown that the catalysts can be applied for generating a photocurrent or for the production of hydrogen peroxide as a chemical fuel.