z-logo
Premium
Silica‐Decoration Boosts Ni Catalysis for (De)hydrogenation: Step‐Abundant Nanostructures Stabilized by Silica
Author(s) -
Ham Hyungwon,
Simanullang Wiyanti F.,
Kanda Yasuharu,
Wen Yu,
Hashimoto Ayako,
Abe Hideki,
Shimizu Kenichi,
Furukawa Shinya
Publication year - 2021
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.202001946
Subject(s) - methylcyclohexane , dehydrogenation , catalysis , density functional theory , nanoparticle , chemical engineering , toluene , materials science , nanostructure , chemistry , photochemistry , nanotechnology , computational chemistry , organic chemistry , engineering
Ni nanoparticles supported on SiO 2 were decorated with additional SiO x species by impregnation with tetraethoxysilane (Si(OEt) 4 ). The combination of electron microscopy, infrared analysis, and density functional theory (DFT) calculations revealed that the SiO x ‐decoration made the surface morphology of Ni nanoparticles highly rough and step‐abundant due to the significant stabilization of low‐coordination‐number sites. The SiO x ‐decorated Ni exhibited 50 times higher catalytic activity for the dehydrogenation of methylcyclohexane to toluene than pure Ni. DFT calculations revealed that the Ni(211) step sites had a more favorable C−H activation than Ni(111) terrace sites and well reproduced the experimental apparent activation energies.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here