Electrical Properties and Defect Chemistry of TiO<sub>2</sub> Single Crystal. II. Thermoelectric Power

Mk, Nowotny; Бак, Т.; Nowotny, J.

doi:10.1021/jp060622s

Cited by 55 publications

(116 citation statements)

References 17 publications

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“…Studies of the electrical properties and defect chemistry continue to appear for this material in both single crystal [219][220][221][222] and nanostructured form [223]. Yet this material to date has not yielded systems for evolving H 2 and O 2 at the 10% benchmark efficiency level.…”

Section: Recent Work On Tio 2 On Photosplitting Of Water Ormentioning

confidence: 99%

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

2007

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This review focuses on the use of inorganic oxide semiconductors for the photoassisted generation of hydrogen from water. Representative studies spanning approximately three decades are included in this review. The topics covered include a discussion of the types of water photosplitting approaches, an ideal photoelectrolysis system, an examination of why oxide semiconductors are attractive for this application, a review of both classical and more recent studies on titanium dioxide, tungsten trioxide, and other binary metal oxides, perovskites and other ternary oxides, tantalates and niobates, miscellaneous multinary oxides, semiconductor alloys and mixed semiconductor composites, and twin-photosystem configurations for water splitting.

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Section: Recent Work On Tio 2 On Photosplitting Of Water Ormentioning

confidence: 99%

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

2007

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“…Comparison of the data of the electrical properties for the polycrystalline TiO specimen with those for TiO 2 single crystal reported elsewhere [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

“…The electrical properties for the polycrystalline 2 TiO specimen [7,8] are then compared to the same properties for 2 TiO single crystal [6,9,10]. These data are considered in terms of the effect of grain boundaries on semiconducting properties of 2 TiO .…”

mentioning

confidence: 99%

Electrical properties of polycrystalline TiO₂ at elevated temperatures. Electrical conductivity

Nowotny

Бак

Burg

2007

Physica Status Solidi (b)

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IN MEMORIAM. This paper is dedicated to the memory of Dr. J. Bruce Wagner, Jr. (1926–2006), long time Professor of Materials Science and Engineering at the Northwestern University, Evanston, IL and Regents Professor of the Arizona State University, Tempe, AZ. Professor Wagner was prominent scientist in the area of solid‐state science, electrochemistry and high temperature chemistry. He served as Director of the Material Research Centre at the Technological Institute of Northwestern University, Director of the Centre for Solid State Science at the Arizona State University. He was also the President of the Electrochemical Society.The present work reports the electrical properties for high purity polycrystalline TiO2 using the measurements of electrical conductivity in the temperature range 1123–1323 K and in the gas phase of controlled oxygen activity (10–13 Pa < p (O2) < 105 Pa). The slope of the log σ vs. log p (O2) dependence is –1/5.4, which is considered in terms of mixed electronic and ionic compensation. The electrical conductivity data within the n –p transition were used for the determination of the conductivity components related to electrons, electron holes and ions. These data were used for the determination of the n –p transition point. The band gap determined from the conductivity components related to electronic charge carriers is equal to 2.8 eV. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Extensive studies have been performed on the reactivity between TiO 2 and oxygen at high temperatures and its impact on defect disorder and bulk electrical properties, such as electrical conductivity [3] and thermoelectric power [5]. So far, however, little is known on the effect of the reactivity on surface properties and the related electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Reactivity at the oxygen/titania interface and the related charge transfer

Бак

Nowotny

et al. 2006

Ionics

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The present paper reports the reactivity between TiO 2 and oxygen and the related charge transfer at 298 and 1,073 K. The studies were performed using work function measurements. It was found that oxidation of TiO 2 at 1,073 K and p(O 2 )=75 kPa, initially standardized at 1,173 K and p(O 2 )=10 Pa, results in work function changes that are consistent with the theoretical model of the charge transfer during oxygen chemisorption and oxygen incorporation at the absence of structural transitions. However, oxidation of TiO 2 at 298 K, p(O 2 )=75 kPa, which has been initially standardized at 1,173 K in extremely reducing conditions at p(O 2 )=~10 −10 Pa, results in work function changes that are consistent with low-dimensional structural changes of the surface layer. It is shown that oxidation of strongly reduced TiO 2 at 298 K results in a decrease of work function, which cannot be explained without assuming the structural changes of the outermost surface layer.

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Electrical Properties and Defect Chemistry of TiO₂ Single Crystal. II. Thermoelectric Power

Cited by 55 publications

References 17 publications

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Electrical properties of polycrystalline TiO₂ at elevated temperatures. Electrical conductivity

Reactivity at the oxygen/titania interface and the related charge transfer

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Electrical Properties and Defect Chemistry of TiO2 Single Crystal. II. Thermoelectric Power

Cited by 55 publications

References 17 publications

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Electrical properties of polycrystalline TiO2 at elevated temperatures. Electrical conductivity

Reactivity at the oxygen/titania interface and the related charge transfer

Contact Info

Product

Resources

About

Electrical Properties and Defect Chemistry of TiO₂ Single Crystal. II. Thermoelectric Power

Electrical properties of polycrystalline TiO₂ at elevated temperatures. Electrical conductivity