Defective high-entropy oxide photocatalyst with high activity for CO2 conversion
| Autor: | Monotori Watanabe, Saeid Akrami, Masayoshi Fuji, Yasushi Murakami, Makoto Arita, Tatsumi Ishihara, Kaveh Edalati |
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| Rok vydání: | 2022 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Photocurrent Condensed Matter - Materials Science Anatase Work (thermodynamics) Materials science Charge carrier mobility Process Chemistry and Technology Oxide Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Catalysis chemistry.chemical_compound Chemical engineering chemistry Physics - Chemical Physics Photocatalysis High activity Electronic band structure General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental. 303:120896 |
| ISSN: | 0926-3373 |
| Popis: | High-entropy oxides (HEOs), as a new family of materials with five or more principal cations, have shown promising properties for various applications. In this work and inspired by inherent defective and strained structure of HEOs, photocatalytic CO2 conversion is examined on a dual-phase TiZrNbHfTaO11 synthesized by a two-step high-pressure torsion mechanical alloying and high-temperature oxidation. The HEO, which had various structural defects, showed simultaneous photocatalytic activity for CO2 to CO and H2O to H2 conversion without the addition of a co-catalyst. The photocatalytic activity of this HEO for CO2 conversion was better than conventional photocatalysts such as anatase TiO2 and BiVO4 and similar to P25 TiO2. The high activity of HEO was discussed in terms of lattice defects, lattice strain, light absorbance, band structure, photocurrent generation and charge carrier mobility to activation centers. The current study confirms the high potential of HEOs as a new family of photocatalysts for CO2 conversion. |
| Databáze: | OpenAIRE |
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