Many important catalysts for energy technology involve late transition metal nanoparticles dispersed across the surface of some support.  The relationships between the energetic stability of late transition metal particles on oxide supports and their structural, electronic, chemisorption and catalytic properties will be reviewed.  Oxide-supported metal catalysts have been studied here using well-defined surfaces involving vapor-deposited metals on single-crystal oxide surfaces, where the metal atoms nucleate and grow nanoparticles.  The energetic stability of the metal atoms in these nanoparticles has been measured as a function of particle size and support by metal atom adsorption calorimetry.  Their small-molecule chemisorption properties and sintering kinetics have also been measured.  We find correlations amongst the energetics of the metal atoms in nanoparticles, which depend both on their particle size their oxide support, and the strength with which they bond adsorbates, catalytic kinetics and sintering rates.                                          * Work supported by DOE-OBES Chemical Sciences Division.

Metal nanoparticle catalysts: Effects of particle size and support on metal atom energetics, catalytic activity, and sintering rates, and why these correlate

245th National Meeting (2013)

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