Photoelectrochemical Water Oxidation Using Cobalt Phosphate‐Modified Nitrogen‐Doped Titania Nanotube Arrays

Autor:	Unseock Kang, Ryusuke Mizuochi, Hyunwoong Park, Kazuhiko Maeda
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	artificial photosynthesis hydrogen production mixed-anion compounds solar fuels water splitting Physics QC1-999 Chemistry QD1-999
Zdroj:	Small Structures, Vol 4, Iss 6, Pp n/a-n/a (2023)
Druh dokumentu:	article
ISSN:	2688-4062 20220022
DOI:	10.1002/sstr.202200229
Popis:	The synthesis of cobalt phosphate (CoPi)‐modified, nitrogen‐doped TiO2 nanotube arrays (N‐TNAs) for photoelectrochemical (PEC) oxygen evolution under visible light is reported. Because of the nitrogen doping, the N‐TNAs exhibit enhanced visible‐light activity toward the PEC water oxidation reaction. However, the performance is diminished as a result of self‐oxidation by photogenerated holes in the valence band of the N‐TNAs. Compared with the N‐TNAs, the CoPi/N‐TNAs prepared under optimal conditions show a twofold improvement in photocurrent generation and are also sensitive to light with wavelengths as long as 580 nm. Stable oxygen evolution with a Faradaic efficiency approaching unity is demonstrated using the CoPi/N‐TNA photoanodes under simulated sunlight for at least 2 h of operation.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/18c3da7a8dc64c0e8a6e5d19ad18db19 Zobrazit plný text záznamu Plný text View record in DOAJ