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Ruthenium Clusters on Carbon Nanofibers for Formic Acid Decomposition: Effect of Doping the Support with Nitrogen.
- Source :
- ChemCatChem; Sep2015, Vol. 7 Issue 18, p2910-2917, 8p
- Publication Year :
- 2015
-
Abstract
- The catalytic properties of 1 wt % Ru catalysts with the same mean Ru cluster size of 1.4-1.5 nm supported on herringbone-type carbon nanofibers with different N contents were compared for H<subscript>2</subscript> production from formic acid decomposition. The Ru catalyst on the support with 6.8 wt % N gave a 1.5-2 times higher activity for the dehydrogenation reaction (CO<subscript>2</subscript>, H<subscript>2</subscript>) than the catalyst on the undoped support. The activity in the dehydration reaction (CO, H<subscript>2</subscript>O) was the same. As a result, the selectivity to H<subscript>2</subscript> increased significantly from 83 to 92 % with N-doping, and the activation energies for both reactions were close (55-58 kJ mol<superscript>−1</superscript>). The improvement could be explained by the presence of Ru clusters stabilized by pyridinic N located on the open edges of the external surface of the carbon nanofibers. This N may activate formic acid by the formation of an adduct (>NH<superscript>+</superscript>HCOO<superscript>−</superscript>) followed by its dehydrogenation on the adjacent Ru clusters. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18673880
- Volume :
- 7
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- ChemCatChem
- Publication Type :
- Academic Journal
- Accession number :
- 109364475
- Full Text :
- https://doi.org/10.1002/cctc.201500216