Impact of the Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes.
J Phys Chem Lett
; 11(17): 7285-7290, 2020 Sep 03.
Article
en En
| MEDLINE
| ID: mdl-32787321
ABSTRACT
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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1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Chem Lett
Año:
2020
Tipo del documento:
Article
País de afiliación:
Reino Unido