Flatband Potentials for Nanostructured SrTiO3 Film Electrodes in Nonaqueous Solvents

Abstract

Abstract: Transparent nanostructured SrTiO₃ film electrodes were prepared on conduction substrates and characterized by XRD, TEM and SEM. The flatband potential (E_fb) of a nanostructured SrTiO₃ electrode was determined with spectroelectrochemical measurement in a range of nonaqueous solvents (acetonitrile, tetrahydrofuran, methanol and ethanol). The results show that E_fb is significantly more positive for water and nonaqueous protic solvents (methanol and ethanol) than for nonaqueous aprotic solvents (acetonitrile and tetrahydrofuran) due to establishment of a proton adsorption-desorption equilibrium. Further, addition of Li⁺ has no significant effect on E_fb in water and nonaqueous protic solvents, but in nonaqueous aprotic solvents, the E_fb shifts to more positive values following the increase of added Li⁺ concentration.

Key words: SrTiO₃ electrode, spectroelectrochemical, nonaqueous protic solvent, nonaqueous aprotic solvent, flatband potential

CLC Number:

O649

ZHANG Huihui, KOU Huizhi, WANG Haibo. Flatband Potentials for Nanostructured SrTiO₃ Film Electrodes in Nonaqueous Solvents[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(6): 1070-1075.

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Flatband Potentials for Nanostructured SrTiO₃ Film Electrodes in Nonaqueous Solvents

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