ACS Combinatorial Science
Technology Note
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between the outer and inner gases. We proceeded as follows:
(1) first, we recorded the signals with the inlet Ar closed (these
signals are representative of 100% leakage); (2) we then
recorded the signals of Ar bypassing the reactor probe (these
signals are representative of 0% leakage); (3) the probe was
then placed 12 μm from the substrate and, after bringing the
reactor probe online, the inlet/outlet flows were balanced; (4)
the gas leakage trend was then followed varying the probe/
catalyst gap stepwise from 21 to 210 μm. The results of this test
are reported in Figure 2.
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ASSOCIATED CONTENT
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S
* Supporting Information
The Supporting Information is available free of charge on the
Overall apparatus photo, scanning reactor evolution line,
workflow of the data handling, and schematic represen-
tation of the simple scan model presented (PDF)
(14) Eckhard, K.; Schluter, O.; Hagen, V.; Wehner, B.; Erichsen, T.;
Schuhmann, W.; Muhler, M. Spatially resolved mass spectrometry as a
fast semi-quantitative tool for testing heterogeneous catalyst libraries
under reducing stagnant-point flow conditions. Appl. Catal., A 2005,
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J. Product gas evolution above planar microstructured model
catalystsA combined scanning mass spectrometry, Monte Carlo,
and Computational Fluid Dynamics study. J. Chem. Phys. 2010, 133,
094504.
AUTHOR INFORMATION
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Corresponding Author
*Phone: +390250995632; fax: +390250314405; e-mail: m.
Author Contributions
M.M., S.R., and L.O. conceived and designed the experiments.
M.M., A.N., and L.O. performed the experiments. M.M. and
S.R. analyzed the data. C.D., V.d.S., R.P., and D.M. contributed
reagents, materials, analysis tools, and/or discussion. M.M.,
(17) Roos, M.; Kielbassa, S.; Schirling, C.; Haring, T.; Bansmann, J.;
̈
Notes
Behm, R. J. Scanning mass spectrometer for quantitative reaction
studies on catalytically active microstructures. Rev. Sci. Instrum. 2007,
78, 084104.
The authors declare no competing financial interest.
(18) Rus, E. D.; Wang, H.; Legard, A. E.; Ritzert, N. L.; Van Dover,
ACKNOWLEDGMENTS
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R. B.; Abruna, H. D. An exchangeable-tip scanning probe instrument
̃
Financial support from the Italian Ministry of Education,
University and Research (MIUR) through the FIRB project
“Oxides at the nanoscale: multifunctionality and applications”
(RBAP115AYN) is gratefully acknowledged. M.M. gratefully
acknowledges financial support from Regione Lombardia
through the project “TIMES, technology and materials for
the efficient use of solar energy”−Accordo Quadro Regione
Lombardia−CNR.
for the analysis of combinatorial libraries of electrocatalysts. Rev. Sci.
Instrum. 2013, 84, 024101.
(19) Li, N.; Assmann, J.; Schuhmann, W.; Muhler, M. Spatially
resolved characterization of catalyst-coated membranes by distance-
controlled scanning mass spectrometry utilizing catalytic methanol
oxidation as gas-solid probe reaction. Anal. Chem. 2007, 79, 5674−
5681.
(20) Tardy, B.; Noupa, C.; Leclercq; Bertolini, J. C.; Hoareau, A.;
Treilleux, M.; Faure, J. P.; Nihoul, G. Catalytic Hydrogenation of 1,3-
Butadiene on Pd Particles Evaporated on Carbonaceous Supports:
Particle Size Effect. J. Catal. 1991, 129, 1.
(21) Silvestre-Albero, J.; Rupprechter, G.; Freund, H. Atmospheric
pressure studies of selective 1,3-butadiene hydrogenation on well-
defined Pd/Al2O3/NiAl(110) model catalysts: Effect of Pd particle
size. J. Catal. 2006, 240, 58.
(22) Schumacher, B.; Plzak, V.; Cai, J.; Behm, R. J. Reproducibility of
highly active Au/TiO2 catalyst preparation and conditioning. Catal.
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(23) Aguilar-Guerrero, V.; Gates, B. C. Kinetics of CO Oxidation
Catalyzed by Supported Gold: A Tabular Summary of the Literature.
Catal. Lett. 2009, 130, 108.
(24) Marelli, M.; Ostinelli, L.; Dal Santo, V.; Milani, P.; Psaro, R.;
Recchia, S. High-throughput spatial resolved tests over planar model
catalyst libraries: A novel reactor approach. Catal. Today 2009, 147,
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(25) Suljovrujic, E.; Micic, M.; Demic, S.; Srdanov, V. I.
́ ́ ́
Combinatorial approach to morphology studies of epitaxial thin
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