Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

19 June 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


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.


spectroscopic analysis
Solar fuels
rate Law Analysis
Water Oxidation Catalysis

Supplementary materials

Impact Synthesis Water Oxidation Kinetics Hematite SI ChemRxiv


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