催化作用
色散(光学)
锐钛矿
纳米花
氧气储存
氧气
化学
贵金属
钯
化学工程
无机化学
金属
催化剂载体
光催化
有机化学
工程类
物理
光学
作者
Huimin Liu,Chenyi Yuan,Shipeng Wu,Chao Sun,Zhen Huang,Hualong Xu,Wei Shen
摘要
Surface property modification of catalyst support is a straightforward approach to optimize the performance of supported noble metal catalysts. In particular, oxygen vacancies and hydroxyl groups play significant roles in promoting noble metal dispersion on catalysts as well as catalytic stability. In this study, we developed a nanoflower-like TiO2-supported Pd catalyst that has a higher concentration of oxygen vacancies and surface hydroxyl groups compared to that of commercial anatase and P25 support. Notably, due to the distinctive structure of the nanoflower-like TiO2, our catalyst exhibited improved dispersion and stabilization of Pd species and the formation of abundant reactive oxygen species, thereby facilitating the activation of CO and O2 molecules. As a result, the catalyst showed remarkable efficiency in catalyzing the low-temperature CO oxidation reaction with a complete CO conversion at 80 °C and stability for over 100 h.
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