Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
Department of Chemistry, PSG College of Technology, Peelamedu, Coimbatore, 641004, India.
Environ Res. 2021 Jul;198:111176. doi: 10.1016/j.envres.2021.111176. Epub 2021 Apr 29.
A binary component catalyst consists of single atoms (SAs- Pt and Au) anchored on self-doped TiO nanotubes (TNTs), was developed for photocatalytic CO 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 CH and CH reached to 360.0 and 28.8 μmol g h, respectively. The metals loading shifted the oxidation path of HO from •OH generation into O evolution, that inhibited the self-oxidization of the photocatalyst.
一种由单原子（Pt 和 Au）锚定在自掺杂 TiO2 纳米管（TNTs）上的双组分催化剂被开发用于光催化 CO 还原。TNTs 基底中的缺陷通过强金属-载体相互作用（MSI）被稳定下来，原子 Pt 和 Au 固定在缺陷部位上，这使得光生电子从缺陷部位有效地转移到单原子上，从而增强了电子-空穴对的分离和载流子的传输。Pt-Au/R-TNTs 中 SA 金属的负载量为 0.33wt%，表现出比未修饰的 R-TNT 高 149 倍的光催化性能，总表观量子效率（AQY）为 17.9%，其中 CH 和 CH 的产率分别达到 360.0 和 28.8 μmol g h。金属负载将 HO 的氧化路径从•OH 生成转移到 O 演化，从而抑制了光催化剂的自氧化。
