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Thermal Methane Conversion to Formaldehyde Promoted by Single Platinum Atoms in PtAl2O4− Cluster Anions.
- Source :
- Angewandte Chemie International Edition; Sep2014, Vol. 53 Issue 36, p9482-9486, 5p
- Publication Year :
- 2014
-
Abstract
- Identification and mechanistic study of thermal methane conversion mediated by gas-phase species is important for finding potentially useful routes for direct methane transformation under mild conditions. Negatively charged oxide species are usually inert with methane. This work reports an unexpected result that the bi-metallic oxide cluster anions PtAl<subscript>2</subscript>O<subscript>4</subscript><superscript>−</superscript> can transform methane into a stable organic compound, formaldehyde, with high selectivity. The clusters are prepared by laser ablation and reacted with CH<subscript>4</subscript> in an ion trap reactor. The reaction is characterized by mass spectrometry and density functional theory calculations. It is found that platinum rather than oxygen activates CH<subscript>4</subscript> at the beginning of the reaction. The Al<subscript>2</subscript>O<subscript>4</subscript><superscript>−</superscript> moiety serves as the support of Pt atom and plays important roles in the late stage of the reaction. A new mechanism for selective methane conversion is provided and new insights into the surface chemistry of single Pt atoms may be obtained from this study. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 53
- Issue :
- 36
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 97729671
- Full Text :
- https://doi.org/10.1002/anie.201403953