TY - JOUR
T1 - Significant CO2 photoreduction on a high-entropy oxynitride
AU - Akrami, Saeid
AU - Edalati, Parisa
AU - Shundo, Yu
AU - Watanabe, Motonori
AU - Ishihara, Tatsumi
AU - Fuji, Masayoshi
AU - Edalati, Kaveh
N1 - Funding Information:
This study is supported partly by the Mitsui Chemicals, Inc., Japan, partly by Hosokawa Powder Technology Foundation, Japan, and partly through Grants-in-Aid from the Japan Society for the Promotion of Science (JSPS), Japan ( JP19H05176 & JP21H00150 ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/1
Y1 - 2022/12/1
N2 - CO2 photoreduction on photocatalysts is a nature-friendly solution to decrease the CO2 amount, but the method still has low efficiency because of difficult separation and easy recombination of charge carriers in available catalysts. In this study, a high-entropy oxynitride was introduced as an active photocatalyst for photoreduction. The material had a chemical composition of TiZrNbHfTaO6N3 and was produced by a high-pressure torsion method followed by oxidation and nitriding. It showed higher photocatalytic CO2 to CO conversion compared to corresponding high-entropy oxide, benchmark photocatalyst P25 TiO2, and almost all catalysts introduced in the literature. The high activity of this oxynitride, which also showed good chemical stability, was attributed to the large absorbance of light and easy separation of electrons and holes, the low recombination of charge carriers, and the high CO2 adsorption on the surface. These findings introduce high-entropy oxynitrides as promising photocatalysts for CO2 photoreduction.
AB - CO2 photoreduction on photocatalysts is a nature-friendly solution to decrease the CO2 amount, but the method still has low efficiency because of difficult separation and easy recombination of charge carriers in available catalysts. In this study, a high-entropy oxynitride was introduced as an active photocatalyst for photoreduction. The material had a chemical composition of TiZrNbHfTaO6N3 and was produced by a high-pressure torsion method followed by oxidation and nitriding. It showed higher photocatalytic CO2 to CO conversion compared to corresponding high-entropy oxide, benchmark photocatalyst P25 TiO2, and almost all catalysts introduced in the literature. The high activity of this oxynitride, which also showed good chemical stability, was attributed to the large absorbance of light and easy separation of electrons and holes, the low recombination of charge carriers, and the high CO2 adsorption on the surface. These findings introduce high-entropy oxynitrides as promising photocatalysts for CO2 photoreduction.
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U2 - 10.1016/j.cej.2022.137800
DO - 10.1016/j.cej.2022.137800
M3 - Article
AN - SCOPUS:85135347829
SN - 1385-8947
VL - 449
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 137800
ER -