CO2 activation on single crystal based ceria and magnesia/ceria model catalysts Y. Lykhach, T. Staudt, R. Streber, M. P.A. Lorenz, A. Bayer, H.-P. Steinrück and J. Libuda Eur. Phys. J. B, 75 1 (2010) 89-100 Published online: 07 April 2010 DOI: 10.1140/epjb/e2010-00110-x