Photoelectrocatalytic processes (e.g. water splitting) are particularly interesting as a method of solar to chemical energy conversion. The catalytic process is driven by transient changes in the semiconductor material's properties, such as the metal oxidation state, the local reconstruction of catalytic sites or charge recombination processes. Here, we report a novel experimental technique for performing pump and probe time-resolved hard X-ray absorption spectroscopy in electrochemical conditions under UV-vis irradiation: pump and probe XAS enables the study of processes occurring in pico- to microseconds time scale by probing the local electronic properties of a selected atom. The described technique was developed using alpha-Fe2O3/IrOx as a model photoelectrode. (C) 2016 Elsevier Ltd. All rights reserved.

Operando and Time-Resolved X-Ray Absorption Spectroscopy for the Study of Photoelectrode Architectures

Alberto Naldoni;
2016-01-01

Abstract

Photoelectrocatalytic processes (e.g. water splitting) are particularly interesting as a method of solar to chemical energy conversion. The catalytic process is driven by transient changes in the semiconductor material's properties, such as the metal oxidation state, the local reconstruction of catalytic sites or charge recombination processes. Here, we report a novel experimental technique for performing pump and probe time-resolved hard X-ray absorption spectroscopy in electrochemical conditions under UV-vis irradiation: pump and probe XAS enables the study of processes occurring in pico- to microseconds time scale by probing the local electronic properties of a selected atom. The described technique was developed using alpha-Fe2O3/IrOx as a model photoelectrode. (C) 2016 Elsevier Ltd. All rights reserved.
2016
207
16
21
Pump-and-probe XAS; hematite; iridium oxide; photoelectrochemical water splitting; XANES
Tomasz Baran; Martina Fracchia; Alberto Vertova; Elisabetta Achilli; Alberto Naldoni; Francesco Malara; Giacomo Rossi; Sandra Rondinini; Paolo Ghigna; Alessandro Minguzzi; Francesco D???Acapito
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1893009
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