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Unraveling the Dynamic Nanoscale Reducibility (Ce4+ → Ce3+) of CeO x-Ru in Hydrogen Activation.
- Source :
- Advanced Materials Interfaces; Dec2015, Vol. 2 Issue 18, pn/a-n/a, 6p
- Publication Year :
- 2015
-
Abstract
- The interaction of molecular hydrogen with ceria is of important relevance for heterogeneous catalysis related to green chemistry and renewable energy. Here, the complex structural transformations of a well-defined cerium oxide model catalyst are followed in situ and in real time when exposed to a reactive H<subscript>2</subscript> environment. By using electron spectromicroscopy and diffraction with chemical and structural sensitivities, it is demonstrated that the transition from CeO<subscript>2</subscript> to crystalline Ce<subscript>2</subscript>O<subscript>3</subscript> occurs through a mixture of transient, coexisting phases on the nanoscale. The findings establish a clear relationship between structure and functionality for hydrogen dissociation over ceria(111), bearing profound implications on the nature of the reduction (Ce<superscript>4+</superscript> → Ce<superscript>3+</superscript>) and mechanism for H<subscript>2</subscript> scission. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21967350
- Volume :
- 2
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Advanced Materials Interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 115275226
- Full Text :
- https://doi.org/10.1002/admi.201500314