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Ruthenium Clusters on Carbon Nanofibers for Formic Acid Decomposition: Effect of Doping the Support with Nitrogen
Author(s) -
Zacharska Monika,
Podyacheva Olga Yu.,
Kibis Lidiya S.,
Boronin Andrey I.,
Senkovskiy Boris V.,
Gerasimov Evgeny Yu.,
Taran Oxana P.,
Ayusheev Artemiy B.,
Parmon Valentin N.,
Leahy J. J.,
Bulushev Dmitri A.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500216
Subject(s) - dehydrogenation , catalysis , formic acid , ruthenium , carbon nanofiber , chemistry , inorganic chemistry , decomposition , carbon fibers , materials science , organic chemistry , composite number , composite material
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 2 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 2 , H 2 ) than the catalyst on the undoped support. The activity in the dehydration reaction (CO, H 2 O) was the same. As a result, the selectivity to H 2 increased significantly from 83 to 92 % with N‐doping, and the activation energies for both reactions were close (55–58 kJ mol −1 ). 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 + HCOO − ) followed by its dehydrogenation on the adjacent Ru clusters.