Abstract
A series of CeO 2 with different morphologies (nanoparticles, nanorods and nanocubes) supported metal nickel catalysts were synthesized successfully using the hydrothermal route. Ni/CeO 2 -R catalyst with nanorods as the support exhibited the best catalytic performance for selective hydrogenation of CAL, which was attributed to the highest concentration of surface oxygen vacancies in Ni/CeO 2 -R. • Ni/CeO 2 with different morphologies were synthesized successfully. • Ni/CeO 2 -R catalyst exhibited the best catalytic performance. • Ni/CeO 2 -R catalyst had the highest concentration of surface oxygen vacancies. • Ni/CeO 2 -R showed excellent catalytic recycling stability. A series of CeO 2 with different morphologies (nanoparticles, nanorods and nanocubes) supported nickel catalysts were synthesized successfully using the hydrothermal route to investigate the morphology effects of CeO 2 on these Ni/CeO 2 catalysts for selective hydrogenation of cinnamaldehyde (CAL). Catalytic activities of three Ni/CeO 2 catalysts were ranked in the order of Ni/CeO 2 -R > Ni/CeO 2 -P > Ni/CeO 2 -C, which was attributed to the the highest concentration of surface oxygen vacancies in Ni/CeO 2 -R. These may lead more active surface oxygen and better redox properties on Ni/CeO 2 -R catalyst. More importantly, Ni/CeO 2 -R also showed excellent catalytic recycling stability, reflecting the morphological effect of nanocatalysis.
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