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@ARTICLE{Eichel:139491,
author = {Eichel, Rüdiger-A. and Jakes, Peter and Jensen,
Christopher and Slageren, Joris van and Roduner, Emil},
title = {{S}upport {E}ffects on {H}ydrogen {D}esorption, {I}sotope
{E}xchange, {C}hemical {R}eactivity, and {M}agnetism of
{P}latinum {N}anoclusters in {KL} {Z}eolite},
journal = {The journal of physical chemistry / C},
volume = {117},
issn = {1932-7447},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2013-05475},
pages = {22732−22745},
year = {2013},
abstract = {ABSTRACT: Platinum clusters were prepared by ion exchange
of a KL zeolite, followed by oxygen calcination and hydrogen
reduction, and characterized by electron paramagnetic
resonance (EPR) and hyperfine sublevel correlation
experiment (HYSCORE) spectroscopy. Simulations indicate that
the cluster contains 12 equivalent platinum atoms.
Therefore, the most likely structure is an icosahedral or
cuboctahedral magic number Pt13 cluster with 12 platinum
atoms at the surface. One atom in the center possesses only
a small spin density. H/D desorption and readsorption
experiments monitored via EPR and HYSCORE measurements
provide information about the structure of the clusters and
about the reversibility of the adsorption/desorption and
isotope exchange process. Deuterium desorption experiments
result in a value of 2.1 ± 0.2 eV for the D2 desorption
energy of the Pt13 clusters dispersed in KL zeolite. This is
more than double of the value for a (111) Pt single-crystal
surface, revealing a finite size and/or support effect.
Oxygen adsorption on deuterium-covered Pt13 clusters did not
show a vigorous oxyhydrogen reaction. It appears that the
reaction is inhibited by the deuterium coverage.},
cin = {IEK-9},
ddc = {540},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {123 - Fuel Cells (POF2-123) / 152 - Renewable Energies
(POF2-152)},
pid = {G:(DE-HGF)POF2-123 / G:(DE-HGF)POF2-152},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000326845400032},
doi = {10.1021/jp406303x},
url = {https://juser.fz-juelich.de/record/139491},
}