Pei, Guang X., Dzade, Nelson Y.  ORCID: https://orcid.org/0000-0001-7733-9473, Zhang, Yue, Hofmann, Jan P., De Leeuw, Nora H. ORCID: https://orcid.org/0000-0002-8271-0545 and Weckhuysen, Bert M.
2021.
Identification of photoexcited electron relaxation in a cobalt phosphide modified carbon nitride photocatalyst.
Chemphotochem
5
(4)
, pp. 330-334.
10.1002/cptc.202000259
|
Preview |
PDF
- Published Version
Available under License Creative Commons Attribution. Download (807kB) | Preview |
Abstract
Transition metal phosphides have been recognized as efficient co‐catalysts to boost the activity of semiconductor photocatalysts. However, a rigorous and quantitative understanding is still to be developed about how transition metal phosphides influence photoexcited electron dynamics. Here, we present a nanosecond time‐resolved transient absorption spectroscopy (TAS) study of the photoexcited electron dynamics in carbon nitrides (g‐C3N4) before and after Co and/or P modifications. Our spectroscopic study showed that Co or P lowered the initial electron density, whereas they promoted the photoexcited electron relaxation of g‐C3N4, with their half‐life times (t50%) of 2.5 and 1.8 ns, respectively. The formation of a CoP co‐catalyst compound promoted the electron relaxation (t50%=2.8 ns) without significantly lowering the charge separation efficiency. Density functional theory (DFT) calculations were undertaken to explore the underlying fundamental reasons and they further predicted that CoP, compared to Co or P modification, better facilitates photoexcited electron transfer from g‐C3N4 to reactants.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Professional Services > Advanced Research Computing @ Cardiff (ARCCA) Schools > Chemistry |
| Additional Information: | This is an open access article under the terms of the Creative Commons Attribution License |
| Publisher: | John Wiley and Sons Inc. |
| ISSN: | 2367-0932 |
| Funders: | EPSRC |
| Date of First Compliant Deposit: | 2 February 2021 |
| Date of Acceptance: | 7 January 2021 |
| Last Modified: | 02 Aug 2024 14:12 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/138165 |
Citation Data
Cited 5 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
 |
Edit Item |
Dimensions
Dimensions