1. Work Report GengYaochen Sept.14th

2. Effect of Ce addition alleviate the growth of metal particles improve the dispersion enhance the interaction between metal and support change the chemical environment around the active metal adjust Ce content of catalyst to abtain different ratio of Cu + /Cu 0 after reduction and correlate the ratio with C DMO &S EG data to figure out the role that Cu + &Cu 0 play in the reaction

3. Catalysts preparation Cu(NO 3 ) 2 + Ce(NO 3 ) 3 + ammonia 真空 干燥 硅溶胶 搅拌 80 ℃ 蒸氨 抽滤 洗涤 400 ℃ 焙烧 CatalystsCe (wt%)Cu (wt%) 0.6Ce20Cu0.6019.85 0.8Ce20Cu0.7619.48 1Ce20Cu0.9320.30 1.2Ce20Cu1.1419.99 Ammonia Evaporation Method ICP analysis

4. CatalystsMetal Dispersion 0.6Ce20Cu20.59% 0.8Ce20Cu17.84% 1Ce20Cu12.72% 1.2Ce20Cu20.46% Characterization N 2 O Titration  Metal dispersion diminishes along with the increase of Ce content in the catalyst, which indicates that the Cu 0 on the surface decreases.

5. Characterization Temperature ( ℃ ) Intensity (a.u.) TPR 100120140160180200220240260280300 1.2Ce 1Ce 0.8Ce 0.6Ce

6. CatalystsSurface Area (m 2 /g)Pore Volume (cm 3 /g) Pore Size (nm) 0.6Ce20Cu390.71.3310.9 0.8Ce20Cu394.21.2910.7 1Ce20Cu400.31.3811.2 1.2Ce20Cu397.31.3611.6 Characterization BET analysis

7. Characterization dV/dD (cm 3 g -1 nm -1 ) Pore Diameter (nm) 1.2Ce 1Ce 0.8Ce 0.6Ce

8. Characterization XRD 1.2Ce 1Ce 0.8Ce 0.6Ce ♦ ▼ ▼ ▼ ♦ Cu + ▼ Cu 0 2 Theta (degree) Intensity (a.u.)

9. CatalystsMetal Dispersion 0.6Ce20Cu20.59% 0.8Ce20Cu17.84% 1Ce20Cu12.72% 1.2Ce20Cu20.46% Characterization N 2 O Titration  Metal dispersion diminishes along with the increase of Ce content in the catalyst, which indicates that the Cu 0 on the surface decreases. ？  The Ce contents of catalysts are so close that the real regularity is blanketed by experimental errors.

10. Thanks for your attention! Qs & As