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Updated: Apr 18, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Enhancing catalytic activity by narrowing local energy gaps--X-ray studies of a manganese water oxidation catalyst
Jie Xiao1, Munirah Khan, Archana Singh
1Institute of Methods for Material Development, Helmholtz-Zentrum Berlin fur Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin (Germany). jie.xiao@helmholtz-berlin.de.
Abstract:
Changes in the local electronic structure of the Mn 3d orbitals of a Mn catalyst derived from a dinuclear Mn(III) complex during the water oxidation cycle were investigated ex situ by X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) analyses. Detailed information about the Mn 3d orbitals, especially the local HOMO-LUMO gap on Mn sites revealed by RIXS analyses, indicated that the enhancement in catalytic activity (water oxidation) originated from the narrowing of the local HOMO-LUMO gap when electrical voltage and visible light illumination were applied simultaneously to the Mn catalytic system.
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