Work

The Effects of Crystal Structure and Electronic Structure on Photocatalytic H2 Evolution and CO2 Reduction over Two Phases of Perovskite-Structured NaNbO3

Year: 2012

Type: article

Abstract: Cubic and orthorhombic NaNbO 3 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 NaNbO 3 have been assessed by H 2 evolution from aqueous methanol solution and CO 2 photoreduction in gas phase. The photocatalytic H 2 evolution and CO 2 reduction activities over cubic NaNbO 3 were nearly twice of those over orthorhombic NaNbO 3 . The first-principles calculation reveals that the higher activity over cubic NaNbO 3 can be attributed to its unique electronic structure, which is beneficial for electron excitation and transfer.

Source: The Journal of Physical Chemistry C

DOI: 10.1021/jp210106b

Authors: Peng Li, Shuxin Ouyang, Guangcheng Xi, Tetsuya Kako, Jinhua Ye

Institutions: Hokkaido University, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, Tianjin University

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funder: Ministry of Education, Culture, Sports, Science and Technology