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  • 1
    Electronic Resource
    Electronic Resource
    Reduction of Static Electrification by means of Inhibiting Compounds (1951)
    [s.l.] : Nature Publishing Group
    Nature 168 (1951), S. 871-872 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The work of Coehn1 and Richards2, coupled with that of Gill and Alfrey3, indicates that such electrical charges are generated by the the transfer of electricity between two bodies of different dielectric constant, induced by a natural field which sets up a contact potential at the interface when ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/168871a0
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  • 2
    Electronic Resource
    Electronic Resource
    Erratum: "Growth and characterization of reactively sputtered thin-film platinum oxides'' [J. Appl. Phys. 69, 1596 (1991)] (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 1660-1660 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352367
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  • 3
    Electronic Resource
    Electronic Resource
    Oxidation of CO by NO2 over Pd(100) (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 1746-1747 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100058a003
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  • 4
    Electronic Resource
    Electronic Resource
    Oxidation of carbon monoxide by oxygen, nitric oxide and mixtures of O2 and NO over palladium(100) (1993)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 97 (1993), S. 5445-5446 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100123a001
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  • 5
    Electronic Resource
    Electronic Resource
    Growth and characterization of reactively sputtered thin-film platinum oxides (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 1596-1604 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin-film oxides of platinum have been prepared by reactive sputtering and characterized primarily by x-ray diffraction (XRD) and Raman scattering. Different phases of the Pt-O system were obtained by adjusting sputtering parameters such as gas composition, deposition rate, and substrate temperature. Optimum conditions for producing crystalline α-PtO2 and PtO were identified. Raman spectra of α-PtO2 films show two sharp lines at 514 and 560 cm−1, in agreement with those from commercially available powders. XRD and high-resolution scanning electron microscopy (HRSEM) analyses indicate that these samples have a poorly crystallized structure with lack of order along the c axis. The Raman spectra from PtO show two broad peaks at 438 and 657 cm−1, close to the lines seen in PdO, which has the same structure as PtO. Estimates from XRD line broadening and HRSEM photographs indicate mean crystallite sizes on the order of 300 A(ring). Infrared reflectivity spectra yield two of the three ir-active phonons, and along with scanning tunneling microscopy measurements suggest that PtO is a semiconductor. Thermoelectric measurements show that the predominant carriers are p-type, and ir reflectivity data indicate a carrier concentration of ∼4×1018 cm−3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347255
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  • 6
    Electronic Resource
    Electronic Resource
    PdRhO2 formation during the air oxidation of a Pd-15Rh alloy (1988)
    Springer
    Oxidation of metals 29 (1988), S. 435-443 
    Details
    ISSN: 1573-4889
    Keywords: Pd-Rh alloys ; PdRhO2 ; PdO ; Raman spectroscopy ; X-ray photoelectron spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The surfaces of air-oxidized Pd-15Rh alloys have been examined by X-ray photoelectron spectroscopy (XPS) and by Raman spectroscopy. The XPS results indicate that the near-surface region of samples oxidized in the temperature range 1075 to 1125 K contains Pd in both the +2 and +1 oxidation states and Rh in the +3 oxidation state. The ratio of Pd (I) to Rh (III) is found to be 1∶1. Raman spectra confirm that two Pd-containing phases, PdO and PdRhO2, are present in the near-surface region and eliminate the possibility that Rh2O3 is present. Also, a resonant Raman effect is observed in anhydrous PdO for exciting wavelengths in the vicinity of 500 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00666844
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  • 7
    Electronic Resource
    Electronic Resource
    High-temperature oxidation of Pt-45Pd-10Rh (1988)
    Springer
    Oxidation of metals 29 (1988), S. 487-497 
    Details
    ISSN: 1573-4889
    Keywords: Alloy ; oxidation ; platinum ; palladium ; rhodium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The surfaces of Pt-45Pd-10Rh foils oxidized over the range 875–1075 K in a 20% O2-Ar mixture at atmospheric pressure were examined by Auger electron, X-ray photoelectron, and Raman spectroscopy. The composition of the oxide formed on the surface was found to vary with temperature from predominantly PdO at 875 K to PdRhO2 at 1075 K. Only a few atomic percent Pt was observed, present in both the metallic and (apparently) +1 oxidation states at 875 K and in the metallic state at 1075 K. The formation of PdRhO2 (and no Rh2O3) at 1075 K was found to persist upon reoxidation following a low-temperature reduction cycle in which the increased Rh concentration on the surface was retained. An oxidation-induced Rh enrichment of the surface of the alloy foil beyond 50 at. % does not appear likely within the temperature/pressure regime investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00666847
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  • 8
    Electronic Resource
    Electronic Resource
    Highly dispersed MgO-supported model Pd-Mo catalysts prepared from bimetallic clusters: Chemisorption and selective catalytic reduction of NO (1996)
    Springer
    Catalysis letters 38 (1996), S. 57-61 
    Details
    ISSN: 1572-879X
    Keywords: bimetallic clusters ; NO reduction ; Pd-Mo catalysts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Model supported palladium and palladium-molybdenum catalysts prepared from organometallic precursors and previously characterized by a variety of chemical and physical methods were examined by IR spectroscopy of NO chemisorption and tested for their activities as catalysts in the competitive NO + CO + O2 reaction. The IR results reveal distinctive behavior of the catalyst made from a bimetallic precursor, and the activity results show that this catalyst is more selective for NO reduction than the other catalysts, but its stability is vulnerable to the reaction conditions. The high selectivity is attributed to Pd-Mo interactions, which are inferred to be stronger in the catalyst prepared from a bimetallic precursor than in catalysts prepared from monometallic precursors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00806900
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  • 9
    Electronic Resource
    Electronic Resource
    Investigation of La3+-modified Al2O3supported CeO2 (1993)
    Springer
    Catalysis letters 17 (1993), S. 175-184 
    Details
    ISSN: 1572-879X
    Keywords: Lanthana-modified alumina ; alumina-supported ceria ; oxygen storage ; three-way catalyst ; X-ray photoelectron spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray photoelectron spectroscopy measurements indicate that the Ce3+ fraction in Al2O3-supported CeO2 can be decreased by the incorporation of La3+. If La3+ is incorporated into the Al2O3 before CeO2 is added, a higher CeO2 dispersion and a greater range of reversible reducibility of the CeO2 may also be obtained. These changes offer potential for improvement in the oxygen storage capacity provided by CeO2 in three-way catalysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00763940
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  • 10
    Electronic Resource
    Electronic Resource
    In situ ellipsometric study of a palladium catalyst during the oxidation of methane (1994)
    Springer
    Catalysis letters 29 (1994), S. 329-338 
    Details
    ISSN: 1572-879X
    Keywords: ellipsometry ; methane ; palladium ; palladium oxide ; oscillations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ellipsometry is used to follow the growth of a PdO layer on the surface of a thick Pd-film catalyst during methane oxidation at ∼ 500°C. The oxide layer that develops under rich conditions (excess CH4) is quite porous and roughens with time. Little CO is formed during this period, but the CO2 formation rate increases until spontaneous oscillations develop, which correlate with changes in the ellipsometric data. These changes indicate that the porous oxide rapidly converts to a metal-rich state, which has decreased catalytic activity, and then slowly reoxidizes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807112
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