O-W-Jon-12 Evolution of the Oxidation State and Morphology of Subnanometer to Nanometer Size Cobalt Catalysts: Detailed Insights from Combined in situ and ex situ Studies

Wednesday, June 5, 2013: 3:40 PM
Jones (Galt House Hotel)
Chunrong Yin1, Eric Tyo2, Sungsik Lee1, Gihan Kwon1, Michael Pellin1, Janae DeBartolo1, Byeongdu Lee1, Soenke Seifert1, Randall E. Winans1, Ewald Janssens3, Peter Lievens3, Stephan Bartling4, Ingo Barke4, Viola von Oeynhausen4, Karl-Heinz Meiwes-Broer4 and Stefan Vajda1,2, (1)Argonne National Laboratory, USA, (2)Yale University, USA, (3)Katholieke Universiteit Leuven, Belgium, (4)Universitšt Rostock, Germany.
In situ GISAXS and GIXANES, in combination with ex situ AFM, TEM and RHEED reveal a strongly size- and temperature dependent evolution of the oxidation state, morphology and crystallinity of subnanometer to 20 nanometer large cobalt clusters under oxidative reaction conditions. The effect of support is discussed as well.

Extended Abstracts: