Transition from Molecule to Solid State: Reactivity of Supported Metal Clusters

The evolution of the adsorption energy of carbon monoxide (CO) molecules on palladium (Pd) clusters as function of Pd particle size from the molecular regime (less than similar to 100 atoms per particle) to the bulk regime has been revealed. This adsorption energy is retrieved from the residence time of CO molecules on the Pd clusters, measured by a pulsed molecular beam technique, versus temperature. Unprecedented accuracy on the determination of the particle size has been achieved here by using a regular array of metal clusters exhibiting a size dispersion down to the ultimate limit of a Poisson distribution. This allows getting rid of the convolution effects that generally occur when considering particles grown through other techniques.     «

The evolution of the adsorption energy of carbon monoxide (CO) molecules on palladium (Pd) clusters as function of Pd particle size from the molecular regime (less than similar to 100 atoms per particle) to the bulk regime has been revealed. This adsorption energy is retrieved from the residence time of CO molecules on the Pd clusters, measured by a pulsed molecular beam technique, versus temperature. Unprecedented accuracy on the determination of the particle size has been achieved here by usin...     »

ISI Document Delivery No.: 143TZ Times Cited: 0 Cited Reference Count: 56 Sitja, Georges Le Moal, Severine Marsault, Maxence Hamm, Guido Leroy, Frederic Henry, Claude R. DFH-UFA (French-German University) organization The authors would like to thank Gilles Renaud and the staff of the BM32 beamline of the European Synchrotron Radiation Facility (Grenoble, France) as well as the DFH-UFA (French-German University) organization for financial support. S.L.M. also thanks Marie D'Angelo and Emrick Briand (Institut des Nano Sciences de Paris, France) for their help during RBS experiments. 0 Amer chemical soc Washington     «

ISI Document Delivery No.: 143TZ Times Cited: 0 Cited Reference Count: 56 Sitja, Georges Le Moal, Severine Marsault, Maxence Hamm, Guido Leroy, Frederic Henry, Claude R. DFH-UFA (French-German University) organization The authors would like to thank Gilles Renaud and the staff of the BM32 beamline of the European Synchrotron Radiation Facility (Grenoble, France) as well as the DFH-UFA (French-German University) organization for financial support. S.L.M. also thanks Marie D'Angelo and Emrick Bria...     »