Impact of TiO2-II phase stabilized in anatase matrix by high-pressure torsion on electrocatalytic hydrogen production

Autor:	Kaveh Edalati, Qing Wang, Hiroto Eguchi, Hadi Razavi-Khosroshahi, Hoda Emami, Miho Yamauchi, Masayoshi Fuji, Zenji Horita
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Severe plastic deformation (SPD) titanium dioxide (TiO2) TiO2-II columbite phase electrocatalysis water splitting Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 8, Pp 334-339 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2019.1609111
Popis:	Electrocatalysis using renewable energy sources provides a clean technology to produce hydrogen from water. Titanium oxide is considered as a potential electrocatalyst not only for hydrogen production but also for CO2 conversion. In this study, to enhance the cathodic electrocatalytic activity of TiO2, the phase composition on TiO2 surface is modified by inclusion of high-pressure TiO2-II phase using high-pressure torsion (HPT) straining. Detailed spectroscopic studies revealed that the energy band gap is reduced and the valence band energy increased with increasing the TiO2-II fraction. The highest electrocatalytic activity for hydrogen production was achieved on an anatase-rich nanocomposite containing TiO2-II nanograins.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/4e525ca490434f88893dd555fb8fa272 Zobrazit plný text záznamu View record in DOAJ