TY  - JOUR
AU  - Simon, Ilka
AU  - Hornung, Julius
AU  - Barthel, Juri
AU  - Thomas, Jörg
AU  - Finze, Maik
AU  - Fischer, Roland A
AU  - Janiak, Christoph
TI  - Synthesis of nickel/gallium nanoalloys using a dual-source approach in 1-alkyl-3-methylimidazole ionic liquids
JO  - Beilstein journal of nanotechnology
VL  - 10
SN  - 2190-4286
CY  - Frankfurt, M.
PB  - Beilstein-Institut zur Förderung der Chemischen Wissenschaften
M1  - FZJ-2020-00612
SP  - 1754 - 1767
PY  - 2019
AB  - NiGa is a catalyst for the semihydrogenation of alkynes. Here we show the influence of different dispersion times before microwave-induced decomposition of the precursors on the phase purity, as well as the influence of the time of microwave-induced decomposition on the crystallinity of the NiGa nanoparticles. Microwave-induced co-decomposition of all-hydrocarbon precursors [Ni(COD)2] (COD = 1,5-cyclooctadiene) and GaCp* (Cp* = pentamethylcyclopentadienyl) in the ionic liquid [BMIm][NTf2] selectively yields small intermetallic Ni/Ga nanocrystals of 5 ± 1 nm as derived from transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and supported by energy-dispersive X-ray spectrometry (EDX), selected-area energy diffraction (SAED) and X-ray photoelectron spectroscopy (XPS). NiGa@[BMIm][NTf2] catalyze the semihydrogenation of 4-octyne to 4-octene with 100% selectivity towards (E)-4-octene over five runs, but with poor conversion values. IL-free, precipitated NiGa nanoparticles achieve conversion values of over 90% and selectivity of 100% towards alkene over three runs.
LB  - PUB:(DE-HGF)16
C6  - pmid:31501747
UR  - <Go to ISI:>//WOS:000482478300001
DO  - DOI:10.3762/bjnano.10.171
UR  - https://juser.fz-juelich.de/record/873294
ER  -