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- Title
Boosting Charge Mediation in Ferroelectric BaTiO<sub>3−x</sub>‐Based Photoanode for Efficient and Stable Photoelectrochemical Water Oxidation.
- Authors
Zhao, Yue; Ran, Lei; Chen, Rui; Song, Yurou; Gao, Junfeng; Sun, Licheng; Hou, Jungang
- Abstract
Oxygen evolution reaction (OER) is a bottleneck to photoelectrochemical (PEC) water splitting; however, there remains an impressive challenge for intrinsic charge transport for the development of integrated photoanodes. Herein, covalent triazine frameworks as conjugated molecules are grafted on the surfaces of ferroelectric BaTiO3−x (CTF/BTO) nanorod array, and then oxyhydroxide oxygen evolution cocatalyst (OEC) is constructed as an integrated photoanode. The OEC/CTF/BTO array not only achieves a high photocurrent density of 0.83 mA cm−2 at 1.23 V versus reversible hydrogen electrode (vs RHE) and low onset potential of ≈0.23 VRHE, but also optimizes outstanding stability. To disclose the origin, the enhanced PEC activity can be contributed to the integration of CTF and OEC, enhancing light‐harvesting capability, boosting charge carrier mediation, and promoting water oxidation kinetics through electrochemical analysis and density functional theory calculations. This study not only provides an alternative to accelerate charge transfer, but also paves the rational design and fabrication of integrated photoanodes for boosting PEC water splitting performance.
- Subjects
OXYGEN evolution reactions; PHOTOELECTROCHEMICAL cells; PHOTOCURRENTS; ANALYTICAL mechanics; CHARGE carriers
- Publication
Small Structures, 2023, Vol 4, Issue 9, p1
- ISSN
2688-4062
- Publication type
Article
- DOI
10.1002/sstr.202300072