The electronic and atomic structural properties of nanoscale metal catalysts exhibit complex influences with origins related to particle size, metal-support, and metal-adsorbate interactions. The experimental investigation of these factors, as well as the elucidation of the impacts they have on mechanisms in catalysis, are hindered by their interdependency in working catalysts. I will present recent evidence obtained using advanced in situ X-ray spectroscopies (High Energy Resolution Fluorescence Detection (HERFD), Resonant Inelastic X-ray Scattering (RIXS) and Extended X-ray Absorption Fine Structure (EXAFS)) that the features underpinning bond strains and adsorbate-bonding effects in nm-scale Pt catalysts supported on both ?-alumina and carbon can be distinguished and quantitatively analyzed.  In the former system, the strong metal-support interaction is the dominant factor affecting the particle electronic properties, and in the latter, such factor is the temperature-dependent adsorbate coverage.

Bond strains and reactivity of supported metal nanocatalysts

248th National Meeting (2014)

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