Li, Xiaochun, Chen, Xiaoxiao, Fang, Yuanxing 
ORCID: 0000-0001-7603-5531, Lin, Wei, Hou, Yidong, Anpo, Masakazu, Fu, Xianzhi and Wang, Xinchen
(2022)
High-performance potassium poly(heptazine imide) films for photoelectrochemical water splitting.
CHEMICAL SCIENCE, 13 (25).
pp. 7541-7551.
|
PDF
High-performance potassium poly(heptazine imide) films for photoelectrochemical water splitting.pdf - Published version Download (1MB) | Preview |
Abstract
Photoelectrochemical (PEC) water splitting is an appealing approach by which to convert solar energy into hydrogen fuel. Polymeric semiconductors have recently attracted intense interest of many scientists for PEC water splitting. The crystallinity of polymer films is regarded as the main factor that determines the conversion efficiency. Herein, potassium poly(heptazine) imide (K-PHI) films with improved crystallinity were <i>in situ</i> prepared on a conductive substrate as a photoanode for solar-driven water splitting. A remarkable photocurrent density of <i>ca.</i> 0.80 mA cm<sup>-2</sup> was achieved under air mass 1.5 global illumination without the use of any sacrificial agent, a performance that is <i>ca.</i> 20 times higher than that of the photoanode in an amorphous state, and higher than those of other related polymeric photoanodes. The boosted performance can be attributed to improved charge transfer, which has been investigated using steady state and <i>operando</i> approaches. This work elucidates the pivotal importance of the crystallinity of conjugated polymer semiconductors for PEC water splitting and other advanced photocatalytic applications.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 7 Affordable and Clean Energy |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 16 Feb 2023 17:38 |
| Last Modified: | 17 Mar 2024 16:01 |
| DOI: | 10.1039/d2sc02043b |
| Open Access URL: | https://doi.org/10.1039/D2SC02043B |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3168467 |
Dimensions
Dimensions
