title: Influence of CeO2 morphology on the catalytic activity of CeO2-Pt hybrids for CO oxidation.
abstract: Ceria, because of its excellent redox behavior and oxygen storage capacity, is used as a catalyst for several technologically important reactions. In the present study, different morphologies of nano-CeO2 (rods, cubes, octahedra) were synthesized using the hydrothermal route. An ultrafast microwave-assisted method was used to efficiently attach Pt particles to the CeO2 polyhedra. These nanohybrids were tested as catalysts for the CO oxidation reaction. The CeO2/Pt catalyst with nanorods as the support was found to be the most active catalyst. XPS and IR spectroscopy measurements were carried out in order to obtain a mechanistic understanding and it was observed that the adsorbed carbonates with lower stability on the reactive planes of nanorods and cubes are the major contributor to this enhanced catalytic activity.
authors.affiliation: Materials Research Center, Indian Institute of Science, Bangalore 560012, India. nravi@mrc.iisc.ernet.in.
authors.forename: Nisha
authors.initials: N
authors.lastname: Singhania
authors.forename: E A
authors.initials: EA
authors.lastname: Anumol
authors.forename: N
authors.initials: N
authors.lastname: Ravishankar
authors.forename: Giridhar
authors.initials: G
authors.lastname: Madras