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

被引：20

作者：

Baran, Tomasz ^{[1
]}

Fracchia, Martina ^{[2
]}

Vertova, Alberto ^{[1
,3
,4
]}

Achilli, Elisabetta ^{[2
]}

Naldoni, Alberto ^{[3
]}

Malara, Francesco ^{[3
]}

Rossi, Giacomo ^{[5
]}

Rondinini, Sandra ^{[1
,3
,4
]}

Ghigna, Paolo ^{[2
,4
]}

Minguzzi, Alessandro ^{[1
,4
]}

D'Acapito, Francesco ^{[6
]}

机构：

[1] Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy

[2] Univ Pavia, Dipartimento Chim, Viale Taramelli 16, I-27100 Pavia, Italy

[3] CNR, Ist Sci & Tecnol Mol, Via Golgi 19, I-20133 Milan, Italy

[4] Ist Nazl Sci & Tecnol Mat, Via Giusti 9, Florence, Italy

[5] Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[6] CNR, IOM, OGG, ESRF 71, Ave Martyrs, F-38043 Grenoble, France

来源：

ELECTROCHIMICA ACTA | 2016年 / 207卷

关键词：

Pump-and-probe XAS; hematite; iridium oxide; photoelectrochemical water splitting; XANES; CHARGE-CARRIER DYNAMICS; MICROWAVE CONDUCTIVITY; HEMATITE PHOTOANODES; WATER OXIDATION; ULTRAFAST; TIO2; RECOMBINATION; INJECTION;

D O I：

10.1016/j.electacta.2016.04.153

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：16 / 21

页数：6

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