Time: 2015.7.31（Friday）9:00 am
Location: Hangtian Mansion (NO.19) Conference Room on the third floor
Reporter: Dr. Xiaowei Chen
Ph.D. in Chemistry (2002) – Dalian Institute of Chemical Physics, CAS.
Postdoctoral Research（2002-2003）- University of Oxford, UK
Postdoctoral Research（2003-2007）- Fritz Haber Institute, Germany
(2007-present) Independent Reseacher of the University of Cadiz, Spain
Abstract:
A partial transformation of the {100} surfaces of ceria nanocubes into a set of nanometer-heighted, {111}-bounded, peaks was achieved by an oxidation treatment at 600 oC. This transformation of the surface structure plays a key influence on the behavior of ceria as support of gold catalysts. Thus, the appearance of well-developed {111}-nano-facets leads to a much higher efficiency in the usage of this noble metal in the synthesis of catalysts when prepared by the deposition-precipitation method. Moreover, gold catalysts supported on the surface-reconstructed oxide present an intrinsic (per gold surface atom) CO oxidation activity much higher than that of catalysts prepared on the non-treated oxide.