Structure and Electronic Properties of SrTiO3–TiO2 Eutectic for Water Splitting Applications

Author:

Guo Yefei1,Zeeshan Hafiz Muhammad2,Yan Mouhui1,Qin Weimin3,Yang Wanting4,Cao Shixun4,Dedkov Yuriy1,Voloshina Elena15ORCID

Affiliation:

1. Department of Physics Shanghai University 99 Shangda Road 200444 Shanghai P. R. China

2. Institute of Chemical Reaction Engineering Hamburg University of Technology (TUHH) Eiß endorfer Straß e 38 21073 Hamburg Germany

3. State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering Shanghai University 99 Shangda Road 200444 Shanghai P. R. China

4. Department of Physics Materials Genome Institute and International Center for Quantum and Molecular Structures 99 Shangda Road 200444 Shanghai P. R. China

5. Institute of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Germany

Abstract

Semiconductors with bandgaps and edges corresponding to the solar energy spectrum are found to be suitable for the water splitting applications using photoelectrochemical reactions. However, many present‐day materials used in these applications do not have high stability and/or high effectiveness over the complete sunlight spectral range. The recently proposed eutectic compounds, which combine two or more semiconducting materials, can overcome many present difficulties and extend the light absorbance spectrum improving the effectiveness of the water splitting cells. Herein, structural and electronic properties studies of the SrTiO3–TiO2 eutectic material, which is a representative example of this family, are presented. It is found that structural properties of this material, particularly the phase separation and formation of the sharp interface between two phases, can be significantly improved up on the thermal annealing, which is very important for their application in the water splitting reactors. The findings present the deep understanding of the interface structure and electronic properties of the SrTiO3–TiO2 eutectic, which can help to improve the functionality of these class of materials in different applications.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Linguistics and Language,Anthropology,History,Language and Linguistics,Cultural Studies

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