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Single‐Atom Gold Catalysis in the Context of Developments in Parahydrogen‐Induced Polarization
Author(s) -
Corma Avelino,
Salnikov Oleg G.,
Barskiy Danila A.,
Kovtunov Kirill V.,
Koptyug Igor V.
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201406664
Subject(s) - spin isomers of hydrogen , catalysis , hydrogen , monatomic gas , polarization (electrochemistry) , materials science , colloidal gold , chemistry , nanoparticle , chemical physics , photochemistry , nanotechnology , organic chemistry
A highly isolated monoatomic gold catalyst, with single gold atoms dispersed on multiwalled carbon nanotubes (MWCNTs), has been synthesized, characterized, and tested in heterogeneous hydrogenation of 1,3‐butadiene and 1‐butyne with parahydrogen to maximize the polarization level and the contribution of the pairwise hydrogen addition route. The Au/MWCNTs catalyst was found to be active and efficient in pairwise hydrogen addition and the estimated contributions from the pairwise hydrogen addition route are at least an order of magnitude higher than those for supported metal nanoparticle catalysts. Therefore, the use of the highly isolated monoatomic catalysts is very promising for production of hyperpolarized fluids that can be used for the significant enhancement of NMR signals. A mechanism of 1,3‐butadiene hydrogenation with parahydrogen over the highly isolated monoatomic Au/MWCNTs catalyst is also proposed.