Low-energy electron diffraction, X-ray photoelectron spectroscopy, and CO-temperature-programmed desorption characterization of bimetallic ruthenium-platinum surfaces prepared by chemical vapor deposition

Article Abstract:

Ru-modified Pt(100) single-crystal surfaces prepared via X-ray irradiation of condensed Ru3(CO)12 layers at cryogenic temperatures and subsequent annealing at ca. 620 K are examined by low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPD), and CO-temperature-programmed desorption(CO-TPD). Inspection of CO-TPD data revealed a new weakly absorbed state of CO for CO-saturated Ru(thera[sub Ru] = 0.42 ML)/Pt(100) upon brief annealing to 900 K with a peak onset temperature ca. 100 K lower than bare Pt(100).

Photoelectron spectroscopy, Chemical vapor deposition, Electron diffraction, Chemical vapour deposition

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Carbon monoxide adsorption on Ru-modified Pt surfaces: Time-resolved infrared reflection absorption studies in ultrahigh vacuum

Article Abstract:

The vibrational spectra of CO adsorbed on Ru-modified Pt(100) surfaces prepared by chemical vapor deposition were investigated by time-resolved infrared reflection adsorption spectroscopy in ultrahigh vacuum (UHV). For all surfaces and CO exposures examined, the total integrated area under the two CO spectral features remained fairly constant and equal in value to the corresponding areas found for bare Pt(100).

Industrial Gas Manufacturing, Industrial gases, Carbon Monoxide, Chemical properties

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Nanostructured PtRu/C as anode catalysts prepared in a pseudomicroemulsion with ionic surfactant for direct methanol fuel cell

Article Abstract:

A simple method used to prepare nanostructured PtRu/C catalysts by metastable water-in-soil pseudomicroemulsion of water solution/sodium dodecylbenzene(NaDDBS)/n-butanol/cyclohexane/Cabot Vulvan XC-72 carbon powder is reported. These catalysts are found to be nanosized and inherit the Pt-face-centered cubic structure with Pt and Ru mainly in the zero valence oxidation state.

China, All Other Basic Organic Chemical Manufacturing, Methanol

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