Wang, H;
Thangamuthu, M;
Wu, Z;
Yang, J;
Yuan, H;
Tang, J;
(2022)
Self-assembled sulphur doped carbon nitride for photocatalytic water reforming of methanol.
Chemical Engineering Journal
, 445
, Article 136790. 10.1016/j.cej.2022.136790.
Preview |
Text
1-s2.0-S1385894722022859-main.pdf - Published Version Download (3MB) | Preview |
Abstract
The ability to effectively harness and store renewable solar energy in chemical forms, e.g., methanol has been widely recognised as a promising and sustainable strategy for H_{2} storage. Though traditional steam reforming of methanol enables effective H_{2} release from methanol and water, the harsh operating conditions result in high energy consumption and CO by-product. To minimize CO emission and maximise H2 production, photocatalytic liquid water reforming of methanol has been developed to produce H_{2} by sulphur doped graphitic carbon nitride (SCN) in this work. Consequently, both H_{2} and carbon dioxide (CO_{2}) can be evolved in an ideal ratio of 3:1 and H_{2} yield has been found to be dependent on pH and the reaction temperature. A stable and reproducible H_{2} evolution rate of 14.7 mmol g^{-1}h^{−1} from water/methanol over 95 h without CO evolution has been achieved, with an apparent quantum efficiency (AQE) of c.a. 30 % at 365 nm. The sulphur was found to exist as N-S-H and C-S-H bonds in the SCN photocatalysts, while the latter was found to be well correlated to the photocatalytic activity of H_{2} production. Such sulfur doping narrows the bandgap and offers enhanced charge separation, thus leading to enhanced photocatalytic activity.
| Type: | Article |
|---|---|
| Title: | Self-assembled sulphur doped carbon nitride for photocatalytic water reforming of methanol |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2022.136790 |
| Publisher version: | https://doi.org/10.1016/j.cej.2022.136790 |
| Language: | English |
| Additional information: | © 2022 The Authors. Published by Elsevier B.V. under a Creative Commons license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Doped graphitic carbon nitride, C-S-H bonds, Water reforming of methanol, Photocatalysis, High stability, H_{2} production |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10149248 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
