Li, Y;
Chen, X;
Sun, Y;
Meng, X;
Dall'Agnese, Y;
Chen, G;
Dall'Agnese, C;
... Wang, X-F; + view all
(2020)
Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂Tₓ MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution.
Advanced Materials Interfaces
, 7
(8)
, Article 1902080. 10.1002/admi.201902080.
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Dallagnese_Chlorosome-Like Molecular Aggregation of Chlorophyll Derivative on Ti3C2Tx MXene Nanosheets for Efficient Noble Metal-Free Photocatalytic Hydrogen Evolution.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Efficient photocatalytic hydrogen evolution reaction (HER) in the visible‐to‐near infrared region at a low cost remains a challenging issue. This work demonstrates the fabrication of organic‐inorganic composites by deposition of supramolecular aggregates of a chlorophyll derivative, namely, zinc methyl 3‐devinyl‐3‐hydroxymethyl‐pyropheophorbide a (Chl) on the surface of Ti3C2Tx MXene with 2D accordion‐like morphology. This composite material is employed as noble metal‐free catalyst in photocatalytic HER under the white light illumination, where Chl serves as a small molecule organic semiconductor component instead of ordinary inorganic and polymer organic semiconductors such as TiO2 and g‐C3N4, and Ti3C2Tx serves as a co‐catalyst. Different composition ratios of Chl/Ti3C2Tx are compared for their light‐harvesting ability, morphology, charge transfer efficiency, and photocatalytic performance. The best HER performance is found to be as high as 52 ± 5 µmol h−1 gcat−1 after optimization. Such a large HER activity is attributed to the efficient light harvesting followed by exciton transfer in Chl aggregates and the resultant charge separation at the interface of Chl/Ti3C2Tx.
| Type: | Article |
|---|---|
| Title: | Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂Tₓ MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/admi.201902080 |
| Publisher version: | https://doi.org/10.1002/admi.201902080 |
| 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: | chlorophyll aggregates, excitonic state transfer, hydrogen evolution, Ti3C2Tx MXene nanosheets |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10093874 |
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