Particle-size dependent heats of adsorption of CO on supported Pd nanoparticles as measured with a single-crystal microcalorimeter

Fischer-Wolfarth, J. H.; Farmer, J. A.; Flores-Camacho, J. M.; Genest, A.; Yudanov, I. V.; Rosch, N.; Campbell, C. T.; Schauermann, S.; Freund, H. J.

doi:10.1103/PhysRevB.81.241416

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Document type:: Journal Article
Author(s):: Fischer-Wolfarth, J. H.; Farmer, J. A.; Flores-Camacho, J. M.; Genest, A.; Yudanov, I. V.; Rosch, N.; Campbell, C. T.; Schauermann, S.; Freund, H. J.
Title:: Particle-size dependent heats of adsorption of CO on supported Pd nanoparticles as measured with a single-crystal microcalorimeter
Abstract:: We present calorimetric measurements of the effect of cluster size on the adsorption enthalpy of carbon monoxide on Pd nanoclusters sized from 120 to 4900 Pd atoms per particle, which were grown in situ on a well-ordered Fe(3)O(4)/Pt(111) film. A substantial decrease in the initial heat of adsorption amounting to about 20-40 kJ mol(-1) was observed on the smallest Pd nanoparticles as compared to the larger Pd clusters and the extended Pd(111) single-crystal surface. We discuss this effect in terms of the size-dependent properties of the Pd nanoparticles. «
We present calorimetric measurements of the effect of cluster size on the adsorption enthalpy of carbon monoxide on Pd nanoclusters sized from 120 to 4900 Pd atoms per particle, which were grown in situ on a well-ordered Fe(3)O(4)/Pt(111) film. A substantial decrease in the initial heat of adsorption amounting to about 20-40 kJ mol(-1) was observed on the smallest Pd nanoparticles as compared to the larger Pd clusters and the extended Pd(111) single-crystal surface. We discuss this effect in ter... »
Congress title:: ISI Document Delivery No.: 618VD Times Cited: 23 Cited Reference Count: 35 Fischer-Wolfarth, Jan-Henrik Farmer, Jason A. Flores-Camacho, J. Manuel Genest, Alexander Yudanov, Ilya V. Roesch, Notker Campbell, Charles T. Schauermann, Swetlana Freund, Hans-Joachim German Science Foundation (DFG); Fonds der Chemischen Industrie; Robert-Bosch-Stiftung; NSF [DGE-0504573]; U.S. DOE, OBES Chemical Sciences [DE-FG02-96ER14630] The work is supported by German Science Foundation (DFG), through collaborative research center 546 "transitionmetal aggregates" and through the Cluster of Excellence "Unifying concepts in catalysis" (UNICAT). We are also grateful to Fonds der Chemischen Industrie for financial support. S. S. acknowledges support from the Robert-Bosch-Stiftung (program "Fast Track"). J.A.F. acknowledges the UW CNT for an NSF-supported IGERT grant (Grant No. DGE-0504573). C.T.C. and J.A.F. acknowledge the U.S. DOE, OBES Chemical Sciences under Grant No. DE-FG02-96ER14630, for support of this work. 23 Amer physical soc College pk
Journal title:: Physical Review B
Year:: 2010
Journal volume:: 81
Journal issue:: 24
Pages contribution:: 4
Fulltext / DOI:: doi:10.1103/PhysRevB.81.241416
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