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@ARTICLE{Cui:173074,
author = {Cui, Chunhua and Gan, Lin and Neumann, Maximilian and
Heggen, Marc and Strasser, Peter},
title = {{C}arbon {M}onoxide-{A}ssisted {S}ize-{C}onfinement of
{B}imetallic {A}lloy {N}anoparticles},
journal = {Journal of the American Chemical Society},
volume = {136},
issn = {0002-7863},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2014-06487},
pages = {4813 4816},
year = {2014},
abstract = {Colloid-based chemical synthesis methodsof bimetallic alloy
nanoparticles (NPs) provide goodmonodispersity, yet
generally show a strong variation ofthe resulting mean
particle size with alloy composition.This severely
compromises accurate correlation betweencomposition of alloy
particles and their size-dependentproperties. To address
this issue, a general CO adsorptionassistedcapping
ligand-free solvothermal synthesis methodis reported which
provides homogeneous bimetallic NPswith almost perfectly
constant particle size over anunusually wide compositional
range. Using Pt−Ni alloyNPs as an example, we show that
variation of the reactiontemperature between 160 and 240 °C
allows for precisecontrol of the resulting alloy particle
bulk compositionbetween 15 and 70 atomic $\%$ Ni, coupled
with a constantmean particle size of ∼4 nm. The
size-confining and Nicontent-controlling role of CO during
the nucleation andgrowth processes are investigated and
discussed. Datasuggest that size-dependent CO surface
chemisorption andreversible Ni-carbonyl formation are key
factors for theachievement of a constant particle size and
temperaturecontrolledNi content. To demonstrate the
usefulness ofthe independent control of size and
composition, sizedeconvolutedrelations between composition
and electrocatalyticproperties are established. Refining
earlier reports,we uncover intrinsic monotonic relations
between catalyticactivity and initial Ni content, as
expected from theoreticalconsiderations.},
cin = {PGI-5},
ddc = {540},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {424 - Exploratory materials and phenomena (POF2-424)},
pid = {G:(DE-HGF)POF2-424},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000333947900005},
doi = {10.1021/ja4124658},
url = {https://juser.fz-juelich.de/record/173074},
}