Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 14, Pages 7621-7628Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp210106b
Keywords
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Funding
- World Premier International Research Center Initiative on Materials Nanoarchitectonics, MEXT
- JST-MOST, Japan
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Cubic and orthorhombic NaNbO3 were fabricated to study the effects of crystal structure and electronic structure on the photocatalytic activities in detail. The samples were characterized by X-ray diffraction, field emission transmission electron microscopy, high-resolution transmission electron microscopy, UV-visible absorption spectroscopy, and X-ray photoelectron spectroscopy. The photocatalytic activities of the two phases of NaNbO3 have been assessed by H-2 evolution from aqueous methanol solution and CO2 photoreduction in gas phase. The photocatalytic H-2 evolution and CO2 reduction activities over cubic NaNbO3 were nearly twice of those over orthorhombic NaNbO3. The first-principles calculation reveals that the higher activity over cubic NaNbO3 can be attributed to its unique electronic structure, which is beneficial for electron excitation and transfer.
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