Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts》.pdf

Applied Catalysis B: Environmental 179 (2015) 128–138 Contents lists available at ScienceDirect Applied Catalysis B: Environmental j o u rn al h omepage: w w w. elsev /locate/apc atb Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts Hale Ay, Deniz Üner ∗ Middle East Technical University, Chemical Engineering, 06800 Ankara, Turkey a r t i c l e i n f o a b s t r a c t Article history: Ceria supported Ni, Co monometallic and Ni–Co bimetallic catalysts were prepared by incipient wetness Received 11 February 2015 impregnation method, calcined at two different temperatures (700 ◦ C and 900 ◦ C) and tested for dry Received in revised form 30 April 2015 reforming of methane reaction at 700 ◦ C. The activities of ceria-based Ni containing catalysts decreased Accepted 6 May 2015 with increasing calcination temperature accompanied by a decrease in coke deposition. While Ni/CeO2 Available online 7 May 2015 and Ni–Co/CeO2 catalysts exhibited comparable high activities, Co/CeO2 catalysts exhibited very low activity. The lower activity of Co/CeO2 catalyst was attributed to strong metal support interaction (SMSI). Keywords: The SMSI effect was confirmed with TEM images showing a layer of support coating the metal particles. Dry reforming of methane Ni The diversity of the deposited carbon structures in terms morphology (s