CO adsorption and dissociation on iron oxide supported Pt particles
作者： Y.-N. Sun , Z.-H. Qin , M. Lewandowski , S. Shaikhutdinov , H.-J. Freund
DOI: 10.1016/J.SUSC.2009.08.022
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摘要: Abstract We studied CO adsorption on Pt particles deposited well-ordered Fe3O4(1 1 1) thin films grown Pt(1 1 1) by temperature programmed desorption (TPD). A highly stepped surface produced ion sputtering and annealing at 600 K was for comparison. Structural characterization performed scanning tunneling microscopy Auger electron spectroscopy. The TPD spectra revealed that in addition to the peaks ∼400 480 K, assigned adsorbed facets low-coordination sites respectively, nanoparticles annealed exhibit a state ∼270 K. This is initial stages of strong metal support interaction resulting partial Fe–Pt intermixing. On both Pt/Fe3O4(1 1 1) surfaces found dissociate 500 K. results suggest dissociation carbon accumulation occur low-coordinated sites.
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