Triphase Photocatalytic CO2 Reduction over Silver‐Decorated Titanium Oxide at a Gas–Water Boundary

作者：Huang Huining; Shi Run; Li Zhenhua; Zhao Jiaqi; Su Chenliang; Zhang Tierui

来源：Angewandte Chemie, 2022, 134(17).

DOI：10.1002/ANGE.202200802

• CO2 Reduction
• Mass Transfer
• Photocatalysis
• Triphase System

Photocatalytic CO2 reduction reaction (CO2RR) is an attractive process to convert CO2 into valuable chemicals. But this reaction is often restricted by the poor mass transfer of CO2 in the liquid phase. Here, we have developed a triphase photocatalytic CO2RR system by supporting Ag‐decorated TiO2 nanoparticles at a gas–water boundary with hydrophobic–hydrophilic abrupt interfacial wettability. Such a triphase system allows the rapid delivery of gas‐phase CO2 to the surface of photocatalysts while maintaining an efficient water supply and uncovered active sites. Ag‐TiO2 supported at the gas–water boundary showed a CO2 reduction rate of 305.7?μmol?g?1?h?1, without hole scavengers, approximately 8 times higher than the nanoparticles dispersed in the liquid phase. Even using diluted CO2 (10?%) as the reactant, the CO2RR activity was superior to most reported Ag‐TiO2</...

• 单位
  深圳大学; 中国科学院大学