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@ARTICLE{Smuda:472515,
author = {Smuda, Matthias and Finzel, Kati and Hantusch, Martin and
Ströh, Jonas and Pienack, Nicole and Khadiev, Azat and
Terraschke, Huayna and Ruck, Michael and Doert, Thomas},
title = {{F}ormation of {B}i$_2${I}r nanoparticles in a
microwave-assisted polyol process revealing the suboxide
{B}i$_4${I}r$_2${O}},
journal = {Dalton transactions},
volume = {50},
issn = {0300-9246},
address = {London},
publisher = {Soc.},
reportid = {PUBDB-2021-05068},
pages = {17665 - 17674},
year = {2021},
abstract = {Intermetallic phases are usually obtained by
crystallization from the melt. However, phases containing
elements with widely different melting and boiling points,
as well as nanoparticles, which provide a high specific
surface area, are hardly accessible via such a
high-temperature process. The polyol process is one option
to circumvent these obstacles by using a solution-based
approach at moderate temperatures. In this study, the
formation of Bi2Ir nanoparticles in a microwave-assisted
polyol process was investigated. Solutions were analyzed
using UV–Vis spectroscopy and the reaction was tracked
with synchrotron-based in situ powder X-ray diffraction
(PXRD). The products were characterized by PXRD and
high-resolution transmission electron microscopy. Starting
from Bi(NO$_3$)$_3$ and Ir(OAc)$_3$, the new suboxide
Bi$_4$Ir$_2$O forms as an intermediate phase at about 160
°C. Its structure was determined by a combination of PXRD
and quantum-chemical calculations. Bi$_4$Ir$_2$O decomposes
in vacuum at about 250 °C and is reduced to Bi$_2$Ir by
hydrogen at 150 °C. At about 240 °C, the polyol process
leads to the immediate reduction of the two metal-containing
precursors and crystallization of Bi2Ir nanoparticles.},
cin = {DOOR ; HAS-User / FS-PET-D / UDresden / UKiel},
ddc = {540},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PET-D-20190712
/ I:(DE-H253)UDresden-20130903 / I:(DE-H253)UKiel-20120814},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P23-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {34806720},
UT = {WOS:000720971000001},
doi = {10.1039/D1DT03199F},
url = {https://bib-pubdb1.desy.de/record/472515},
}