Working Paper
Authors
- Camilo A. Mesa
Imperial College London ,
- Ludmilla Steier ,
- Benjamin Moss ,
- Laia Francàs ,
- James E. Thorne ,
- Michael Grätzel ,
- James R Durrant
Abstract
Operando spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.
Content

Supplementary material

Impact Synthesis Water Oxidation Kinetics Hematite SI ChemRxiv