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      Efficient water oxidation under visible light by tuning surface defects on ceria nanorods

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          Abstract

          Surface defects including oxygen vacancies and Ce 3+ ions on the surface of CeO 2 nanorods lead to an efficient catalytic activity towards water oxidation under visible light.

          Abstract

          Fluorite CeO 2 nanorods (NRs) with tunable surface defects are successfully prepared via hydrothermal synthesis followed by post-calcination under different atmospheres. Impressively, the CeO 2 NRs obtained under mixed Ar and H 2 gas at 800 °C exhibit superior catalytic activity towards water oxidation under visible light ( λ ≥ 420 nm), which is 10 times higher than that of CeO 2 NRs treated under air at 800 °C. Detailed characterization and theoretical analysis reveal that the rich surface defects including surface oxygen vacancies and Ce 3+ ions are the origin of the enhanced water oxidation performance of the CeO 2 NRs treated under the reduced atmosphere.

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          Heterogeneous photocatalyst materials for water splitting.

          Akihiko Kudo, Yugo Miseki (2009)
          This critical review shows the basis of photocatalytic water splitting and experimental points, and surveys heterogeneous photocatalyst materials for water splitting into H2 and O2, and H2 or O2 evolution from an aqueous solution containing a sacrificial reagent. Many oxides consisting of metal cations with d0 and d10 configurations, metal (oxy)sulfide and metal (oxy)nitride photocatalysts have been reported, especially during the latest decade. The fruitful photocatalyst library gives important information on factors affecting photocatalytic performances and design of new materials. Photocatalytic water splitting and H2 evolution using abundant compounds as electron donors are expected to contribute to construction of a clean and simple system for solar hydrogen production, and a solution of global energy and environmental issues in the future (361 references).
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            Semiconductor-based photocatalytic hydrogen generation.

            Xiaobo Chen, Shaohua Shen, Liejin Guo … (2010)
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              Visible-light photocatalysis in nitrogen-doped titanium oxides.

              R Asahi, T Morikawa, T Ohwaki … (2001)
              To use solar irradiation or interior lighting efficiently, we sought a photocatalyst with high reactivity under visible light. Films and powders of TiO(2-x)N(x) have revealed an improvement over titanium dioxide (TiO2) under visible light (wavelength < 500 nanometers) in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface. Nitrogen doped into substitutional sites of TiO2 has proven to be indispensable for band-gap narrowing and photocatalytic activity, as assessed by first-principles calculations and x-ray photoemission spectroscopy.
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                Author and article information

                Journal
                Journal ID (publisher-id): JMCAET
                Title: Journal of Materials Chemistry A
                Abbreviated Title: J. Mater. Chem. A
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 2050-7488
                ISSN (Electronic): 2050-7496
                Publication date Created: 2015
                Publication date (Electronic): 2015
                Volume: 3
                Issue: 41
                Pages: 20465-20470
                Affiliations
                [1 ]Department of Physical Chemistry
                [2 ]School of Metallurgical and Ecological Engineering
                [3 ]University of Science and Technology Beijing
                [4 ]Beijing 100083
                [5 ]P. R. China
                [6 ]National Key Laboratory of Biochemical Engineering
                [7 ]Institute of Process Engineering
                [8 ]Chinese Academy of Sciences
                [9 ]Beijing 100190
                [10 ]Key Laboratory of Nanosystem and Hierarchical Fabrication
                [11 ]National Center for Nanoscience and Technology
                Article
                DOI: 10.1039/C5TA05817A
                SO-VID: 33161f55-9b1c-401f-a193-676f7e662607
                Copyright © © 2015
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