Enhancing Catalytic Activity by Narrowing Local Energy Gaps - X-Ray Studies of a Manganese Water Oxidation Catalyst

Jie Xiao, Munirah Khan, Archana Singh, Edlira Suljoti, Leone Spiccia, Emad F. Aziz

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Changes in the local electronic structure of the Mn3d orbitals of a Mn catalyst derived from a dinuclear MnIII 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 Mn3d 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.

Original languageEnglish
Pages (from-to)872-877
Number of pages6
JournalChemSusChem
Volume8
Issue number5
DOIs
StatePublished - Mar 2015
Externally publishedYes

Keywords

  • charge transfer
  • electrochemistry
  • manganese
  • water chemistry
  • x-ray absorption spectroscopy

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