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@ARTICLE{Schmolke:873295,
author = {Schmolke, Laura and Gregori, Bernhard J. and Giesen,
Beatriz and Schmitz, Alexa and Barthel, Juri and Staiger,
Lena and Fischer, Roland A. and Jacobi von Wangelin, Axel
and Janiak, Christoph},
title = {{B}imetallic {C}o/{A}l nanoparticles in an ionic liquid:
synthesis and application in alkyne hydrogenation},
journal = {New journal of chemistry},
volume = {43},
number = {42},
issn = {1369-9261},
address = {London},
publisher = {RSC},
reportid = {FZJ-2020-00613},
pages = {16583 - 16594},
year = {2019},
abstract = {Herein, we report the microwave-induced decomposition of
various organometallic cobalt and aluminum precursors in an
ionic liquid (IL), 1-butyl-3-methylimidazolium
bis(trifluoromethylsulfonyl)imide ([BMIm]NTf2), resulting in
Co/Al nanoalloys with different molar Co/Al ratios. The
dual-source precursor system of dicobalt octacarbonyl
(Co2(CO)8) and pentamethylcyclopentadienyl aluminum
([AlCp*]4) in [BMIm]NTf2 afforded CoAl nanoparticles
(CoAl-NPs) with a molar Co/Al ratio of 1 : 1. Their size
and size distribution were determined via transmission
electron microscopy (TEM) to be an average diameter of 3.0
± 0.5 nm. Furthermore, the dual-source precursor system of
cobalt amidinate ([Co(iPr2-MeAMD)2]) and aluminum amidinate
[Me2Al(iPr2-MeAMD)] in molar ratios of 1 : 1 and
3 : 1 resulted in CoAl- and Co3Al-NPs with an average
diameter of 3 ± 1 and 2.0 ± 0.2 nm, respectively. All the
obtained materials were characterized via TEM, energy
dispersive X-ray spectroscopy (EDX), selected area electron
diffraction (SAED), together with high-angle annular
dark-field scanning transmission electron microscopy
(HAADF-STEM) and (high-resolution) X-ray photoelectron
spectroscopy ((HR-)XPS). Phase-pure Co/Al-NPs were not
obtained since the concomitant formation of Co-NPs and Al2O3
occurred in this wet-chemical synthesis. The as-prepared
Co/Al nanoalloys were evaluated as catalysts in the
hydrogenation of phenylacetylene under mild conditions (2
bar H2, 30 °C in THF). In comparison to the monometallic
Co-NPs, the Co/Al-NPs showed a significantly higher
catalytic hydrogenation activity. The Co- and Co/Al-NPs were
also active under harsher reaction conditions (80 bar H2, 80
°C) without the addition of the activating co-catalyst
DIBAL-H.},
cin = {ER-C-2},
ddc = {540},
cid = {I:(DE-Juel1)ER-C-2-20170209},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000493080000018},
doi = {10.1039/C9NJ03622A},
url = {https://juser.fz-juelich.de/record/873295},
}