| 초록 |
In this study, we control the surface of metal co-catalyst for efficient CO2 conversion by introducing of adsorbed gas ligand such as CO and CO2 during the photo-deposition process on TiO2 film. In order to examine the photocatalytic activity of surface tuned metal, we perform the CO2 conversion reaction using varying metal/TiO2 samples. When CO act as gas ligand during the metal growth, resulting metal enhance to or inhibit photocatalysis for CO2 conversion. Based on cyclic voltammetry and in-situ FTIR results, we expect that this contrasted result is strongly relevant to CO binding energy of metal. On the other hand, CO2 conversion rate is increased regardless of type of metal, when CO2 act as gas ligand. It is responsible for high adsorption property of metal with CO2, since specific facet, which has strong binding energy with CO2, is developed during the metal growth under CO2 gas. |
