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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/27819

Title: C(sp(3))-H Bond Activation by Perovskite Solar Photocatalyst Cell
Authors: Huang, Haowei
Yuan, Haifeng
Zhao, Jiwu
Solis-Fernandez, Guillermo
Zhou, Chen
Seo, Jin Won
Hendrix, Jelle
Debroye, Elke
Steele, Julian A.
Hofkens, Johan
Long, Jinlin
Roeffaers, Maarten B. J.
Issue Date: 2019
Citation: ACS ENERGY LETTERS, 4(1), p. 203-208
Abstract: Inspired by efficient perovskite solar cells, we developed a three component hybrid perovskite-based solar photocatalyst cell, NiOx/FAPbBr(3)/TiO2, for C(sp(3))-H bond activation with high selectivity (similar to 90%) and high conversion rates (3800 mu mol g(-1) h(-1)) under ambient conditions. Time-resolved spectroscopy on our photocatalytic cell reveals efficient exciton dissociation and charge separation, where TiO2 and NiOx serve as the electron- and hole-transporting layers, respectively. The photogenerated charge carriers injected into TiO2 and NiOx drive the challenging C-H activation reaction via the synergetic effects of their band alignment relative to FAPbBr(3). The reaction pathway is investigated by controlling the free-radical formation, and we find that C-H activation is mainly triggered by hole oxidation. Besides aromatic alkanes, also the C(sp(3))-H bond in cycloalkanes can be oxidized selectively. This work demonstrates a generic strategy for engineering high-performance photocatalysts based on the perovskite solar cell concept.
Notes: [Huang, Haowei; Steele, Julian A.; Roeffaers, Maarten B. J.] Katholieke Univ Leuven, Ctr Surface Chem & Catalysis COK, Dept Microbial & Mol Syst, Celestijnenlaan 200F, B-3001 Leuven, Belgium. [Yuan, Haifeng; Solis-Fernandez, Guillermo; Hendrix, Jelle; Debroye, Elke; Hofkens, Johan] Katholieke Univ Leuven, Fac Sci, Dept Chem, Celestijnenlaan 200F, B-3001 Heverlee, Belgium. [Zhao, Jiwu; Long, Jinlin] Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China. [Zhou, Chen; Seo, Jin Won] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Heverlee, Belgium.
URI: http://hdl.handle.net/1942/27819
DOI: 10.1021/acsenergylett.8b01698
ISI #: 000456493100026
ISSN: 2380-8195
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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