Effects of morphology and structure of titanate supports on the performance of ceria in selective catalytic reduction of NO

The titanates with various morphologies and structures, e.g. nanoparticle (NP), nanotube (NT), nanowire (NW), nanorod (NR) and fragment (FR), were successfully synthesized in this paper, which were subsequently utilized as supports for CeO2 in selective catalytic reduction of NO. Experimental results revealed that Ce/NP, Ce/NT and Ce/FR samples were highly active, whilst Ce/NW and Ce/NR samples showed very poor performance. We proposed that the difference in their performances was mainly originated from the resulting chemical states of CeO2, which were induced by the nature of titanate supports, i.e. special surface properties and unique structures and morphologies. (C) 2012 Elsevier B.V. All rights reserved.