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Novel energy platform for the directed charge transfer in the cascade Z-scheme heterojunction for CO2 photoreduction without the need for a cocatalyst

Bian, J; Zhang, Z; Feng, J; Thangamuthu, M; Yang, F; Sun, L; Li, Z; ... Jing, L; + view all (2021) Novel energy platform for the directed charge transfer in the cascade Z-scheme heterojunction for CO2 photoreduction without the need for a cocatalyst. Angewandte Chemie: International Edition 10.1002/anie.202106929. (In press).

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Thangamuthu_Novel energy platform for the directed charge transfer in the cascade Z-scheme heterojunction for CO2 photoreduction without the need for a cocatalyst_AAM.pdf - Accepted version
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Abstract

A universal strategy is developed to construct a cascade Z-scheme system, in which an effective energy platform is a core to direct charge transfer and separation, blocking the unexpected type-II charge transfer pathway. The dimension-matched (001)TiO 2 -g-C 3 N 4 /BiVO 4 nanosheet heterojunction (T-CN/BVNS) is the first such model. The optimized cascade Z-scheme exhibits ~19-fold photoactivity improvement for CO 2 reduction to CO in the absence of cocatalysts and costly sacrificial agents under visible-light irradiation, compared with BVNS, which is also superior to other reported Z-scheme systems even with noble metals as mediators. The experimental results and DFT calculations based on Van der Waals structural models on the ultrafast timescale reveal the introduced T as the platform could not only prolong the lifetimes of spatially separated electrons and holes but also did not compromise their reduction and oxidation potentials.

Type: Article
Title: Novel energy platform for the directed charge transfer in the cascade Z-scheme heterojunction for CO2 photoreduction without the need for a cocatalyst
Location: Germany
DOI: 10.1002/anie.202106929
Publisher version: https://doi.org/10.1002/anie.202106929
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Solar fuel synthesis, Cascade Z scheme heterojunction, CO2 photoreduction, Water splitting, Energy platform
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10131667
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