Li, Y;
Sun, Y;
Zheng, T;
Dall'Agnese, Y;
Dall'Agnese, C;
Meng, X;
Sasaki, S-I;
... Wang, X-F; + view all
(2021)
Chlorophyll based organic heterojunction on Ti3C2Tx MXenes nano‐sheets for efficient hydrogen production.
Chemistry - A European Journal
, 27
(16)
pp. 5277-5282.
10.1002/chem.202005421.
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Abstract
Z‐scheme process is a photo‐induced electron transfer pathway in natural oxygenic photosynthesis involving the electron transport from photosystem II (PSII) to PSI. Inspired by the interesting Z‐scheme process, here we demonstrated a photocatalytic hydrogen evolution reaction (HER) employing chlorophyll derivatives, Chl‐1 and Chl‐2, on the surface of Ti3C2Tx MXenes with two‐dimensional accordion‐like morphology forming Chl‐1@Chl‐2@Ti3C2Tx composite. Due to the frontier molecular orbital energy alignments of Chl‐1 and Chl‐2, the sublayer Chl‐1 is a simulation of PSI whereas the upper layer Chl‐2 is equivalent to PSII, and the resultant electron transport can take place from Chl‐2 to Chl‐1. Under the illumination of visible light (> 420 nm), the HER performance of Chl‐1@Chl‐2@Ti3C2Tx photocatalysts was found to be as high as 143 μmol/h/gcat , which was substantially higher than that of photocatalysts of either Chl‐1@Ti3C2Tx (20 μmol/h/g) or Chl‐2@Ti3C2Tx (15 μmol/h/g).
Type: | Article |
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Title: | Chlorophyll based organic heterojunction on Ti3C2Tx MXenes nano‐sheets for efficient hydrogen production |
Location: | Germany |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1002/chem.202005421 |
Publisher version: | https://doi.org/10.1002/chem.202005421 |
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: | Hydrogen evolution reaction, Ti3C2Tx MXenes, Z-scheme, chlorophyll, organic heterojunction photocatalysts |
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/10120519 |
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