Li, Y;
Liu, Y;
Sun, X;
Zheng, T;
Dall'Agnese, Y;
Dall'Agnese, C;
Sasaki, SI;
... Wang, XF; + view all
(2021)
Aggregate-forming semi-synthetic chlorophyll derivatives / Ti₃C₂Tₓ MXene hybrids for photocatalytic hydrogen evolution.
Dyes and Pigments
, 194
, Article 109583. 10.1016/j.dyepig.2021.109583.
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Dall'Agnese_Aggregate-forming semi-synthetic chlorophyll derivatives : Ti₃C₂Tₓ MXene hybrids for photocatalytic hydrogen evolution_AAM.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Chlorophylls (Chls) are the most abundant natural pigments having excellent opt-electrical and semi-conductive properties. Ti3C2Tx MXene, one of the most extensively studied 2D noble metal-free co-catalyst, features outstanding electrochemical properties. This work compares three aggregate-forming chlorophyll derivatives (Chl-n; n = 1–3), namely, zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide-a (Chl-1), zinc dodecyl 3-devinyl-3-hydroxymethyl-pyropheophorbide-a (Chl-2) and zinc dodecyl 131-deoxo-3-devinyl-131-dicyanomethylene-3-hydroxymethyl-pyropheophorbide-a (Chl-3), as light-harvesting antenna pigments in the MXene-based photocatalytic system for hydrogen evolution under the white light illumination (λ > 420 nm). The hydrogen evolution reaction (HER) of these Chls depends on the peripheral substituent groups at the C13- and/or C17-positions of the chlorin macrocyclic π-system. Differences among these Chl-n sensitized Ti3C2Tx MXene (Chl-n@Ti3C2Tx) are compared in terms of their light-harvesting ability, morphology, charge transfer efficiency and photocatalytic performance. The best HER performance is found to be as high as 122 μmol/h/gcat with the Chl-3@Ti3C2Tx composite. This work leads the direction in synthesizing Chls in Chl/MXene hybrid structure suitable for highly efficient photocatalytic HER.
| Type: | Article |
|---|---|
| Title: | Aggregate-forming semi-synthetic chlorophyll derivatives / Ti₃C₂Tₓ MXene hybrids for photocatalytic hydrogen evolution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.dyepig.2021.109583 |
| Publisher version: | https://doi.org/10.1016/j.dyepig.2021.109583 |
| 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. |
| 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-pp.ucl.ac.uk/id/eprint/10132173 |
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