Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 17, Pages 7285-7290Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c02004
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Funding
- EU [732840 A-LEAF]
- EPSRC [EP/R0 23581/1]
- Colombian Science Ministry
- European Research Council (H2020-MSCA-IF-2016) [749231]
- Swiss National Science Foundation [140709]
- Swiss Federal Office for Energy (project PECHouse 3) [SI/500090-03]
- Marie Curie Actions (MSCA) [749231] Funding Source: Marie Curie Actions (MSCA)
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Operando spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. While these photoanodes exhibit very different current/voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Higher temperature thermal annealing was found to correlate with a shift in the photocurrent onset potential toward less positive potentials, assigned to a suppression of both back electron-hole recombination and of charge accumulation in intra-bandgap states, indicating these intra-bandgap states do not contribute directly to water oxidation.
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