Hydrogenation of CO_2 over a Yba_2Cu_3O_6～7 catalyst

摘要

Under different reaction conditions, hydrogenation of CO_2 over a Yba_2Cu-3O_6～7 superconductor catalyst was studied, and 1.72/100 yield of Methanol was obtained at the optimum reaction conditions of 513 K, 3600 H~-1 and 3.0 Mpa, The main products were methanol, CO and trace of CH_3OCH_3. XPS, XRD and AFM techniques were used to characterize the Structure, the copper oxidation states and the active sites. It was found that At in situ reaction condition, the structure of Yba_2Cu_3O_6～7 transformed from Orthorhombic to tetragonal phase.