Effect of oxygen nonstoichiometry on photo-electrochemical properties of TiO2-x

被引：85

作者：

Radecka, M. ^{[1
]}

Trenczek-Zajac, A. ^{[1
]}

Zakrzewska, K. ^{[1
]}

Rekas, M. ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, PL-30059 Krakow, Poland

来源：

JOURNAL OF POWER SOURCES | 2007年 / 173卷 / 02期

关键词：

photoelectrochemical cell; titanium dioxide; nonstoichiometry; magneli phases; photoelectrochemical properties; quantum efficiency;

D O I：

10.1016/j.jpowsour.2007.05.065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Polycrystalline TiO2-x pellets were equilibrated at 1220-1420 K in a flow of Ar + 7 vol. % H-2 gas mixture. The resulting deviation x from stoichiometric composition of titanium dioxide was determined gravimetrically. X-ray diffractometry revealed coexistence of rutile with TinO2n-1 Magneli phases. Optical reflectance and photocurrent spectroscopies served as experimental methods of the band gap determination. Polycrystalline TiO2-x were used as photoanodes in a photoelectrochentical cell. The photocurrent response to the applied voltage was studied. It was found that TiO2-x with x ca. 0.006 exhibited the best photoelectrochemical performance. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：816 / 821

页数：6

共 20 条

[1]

IDENTIFICATION OF TITANIUM OXIDES BY X-RAY POWDER PATTERNS [J].