期刊
ENVIRONMENTAL RESEARCH
卷 198, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111176
关键词
Single atoms binary component; Metal support interactions; Self-doped Tio2 nanotubes; Photocatalytic CO2 reduction
资金
- National Key Research and Development Program of China [2020YFC1908704]
- National Natural Science Foundation of China [52070082]
- International Science & Technology Cooperation Program of China [2016YFE0126300]
A binary component catalyst with single atoms (SAs- Pt and Au) anchored on self-doped TiO2 nanotubes (TNTs) has been developed for enhancing photocatalytic CO2 reduction, demonstrating significantly improved performance compared to unmodified catalysts.
A binary component catalyst consists of single atoms (SAs- Pt and Au) anchored on self-doped TiO2 nanotubes (TNTs), was developed for photocatalytic CO2 reduction. The defects introduced TNTs substrate was stabilized with atomic Pt and Au via strong metal support interactions (MSI), due to which, the covalent interactions facilitated an effective transfer of photo-generated electrons from the defective sites to the SAs, and in turn an enhanced separation of electron-hole pairs and charge-carrier transmission. The Pt-Au/R-TNTs with 0.33 wt% of SA metals, exhibited a maximum of 149 times higher photocatalytic performance than unmodified R-TNT and a total apparent quantum yield (AQY) of 17.9%, in which the yield of CH4 and C2H6 reached to 360.0 and 28.8 mu mol g-1 h-1, respectively. The metals loading shifted the oxidation path of H2O from center dot OH generation into O2 evolution, that inhibited the self-oxidization of the photocatalyst.
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