[2A17-20] Hydrogen production/energy career/CCU 9

[2A17] Role of oxygen vacancy in the methanol synthesis from CO₂ using Pt-loaded molybdenum suboxide catalyst

○Yasutaka Kuwahara^1,2,3, Takashi Mihogi¹, Hisayoshi Kobayashi^1,4, Hiromi Yamashita^1,2 (1. Osaka University, 2. Kyoto University ESICB, 3. JST PRESTO, 4. Kyoto Institute of Technology)

Pt-loaded molybdenum suboxide catalyst shows a high catalytic activity in the CO₂ hydrogenation reaction to produce methanol, in which oxygen vacancy sites created during H₂ pretreatment has been believed to play an important role for achieving high activity and selectivity. In this study, we performed in-situ XAFS analysis and DFT calculations to track the reaction mechanism and clarified that the oxygen vacancy acts as an active site for deoxygenation of CO₂ to produce CO intermediate.