| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
We elucidated the active sites for unfavorable CH4 formation over Al2O3-supported Pt catalyst during hydrogenation of CO2 at ambient pressure, by using a combination of X-ray absorption spectroscopy (XAS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) with product analysis (operando XAS-DRIFTS). Bicarbonate species are formed on the Al2O3 surface upon adsorption of CO2 at the surface hydroxyl groups of Al2O3. Those bicarbonate species are hydrogenated toward CO by hydrogen spillover from Pt surface as the dissociation sites of H2. The combined data of XAS and DRIFTS revealed that CO species co-adsorbed with H on the perimeter Pt sites at the interface between Pt particles and Al2O3 surface, and then further hydrogenation of those CO species led to the CH4 formation.
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