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  • 1
    Electronic Resource
    Electronic Resource
    Thermal transpiration of CO"2 at high temperature
    Amsterdam : Elsevier
    Vacuum 25 (1975), S. 113-114 
    Details
    ISSN: 0042-207X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0042-207X(75)91822-9
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Surface behaviour of reduced LaCoO"3 as studied by TPD of CO, CO"2 and H"2 probes and by XPS
    Amsterdam : Elsevier
    Applied Surface Science 31 (1988), S. 301-316 
    Details
    ISSN: 0169-4332
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0169-4332(88)90095-5
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  • 3
    Electronic Resource
    Electronic Resource
    An XPS and reduction study of PrCoO3 (1988)
    Springer
    Journal of materials science 23 (1988), S. 1018-1023 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The perovskite-type oxide PrCoO3 has been studied by means of X-ray photoelectron spectroscopy (XPS), reduction in H2 and X-ray diffraction. Two types of oxygen were detected: lattice oxygen (binding energy = 528.4 eV) and adsorbed oxygen (binding energy = 530.9 eV). The increase in relative intensity of the peak corresponding to the latter species after reduction of PrCo03 to 3e− per molecule is assigned to the formation of hydroxyl groups. Temperature-programmed reduction (TPR) results showed two reduction steps: to 1 e− per molecule (Co3.1 → Co2+) at 475 to 635 K, and to 3e− per molecule (Co21 → Co0) at 725 to 815 K. Reduction in the first and second steps occurs according to the contracting sphere model and the nucleation mechanism, respectively. Reduction of Co3+ to Co2+ causes minimal structural changes in the perovskite. Reduction to 3e− per molecule yielded Pr2O3 and metallic cobalt. After this reduction and reoxidation at 973 K, the perovskite structure was regained. By XPS and TPR it was shown that PrCo03 is more easily reducible than LaCo03. It is concluded that the cation in the A position of the structure plays a significant role in the bulk and surface properties of LnCo03 (Ln, lanthanide elements) oxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01154005
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of palladium supported on NaY zeolite (1986)
    Springer
    Reaction kinetics and catalysis letters 31 (1986), S. 1-8 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Рассмотрены химические и физические методы определения размера частиц металла (d) для палладия, нанесенного на цеолит YNa. Величины d, определенные хемосорбцией H2, титрованием O2−H2 и H2−O2 и трансмиссионной электронной микроскопией, находятся в хорошем согласии. Хемосорбция O2 и CO дает несколько повышенные величины.
    Notes: Abstract Chemical and physical methods for the determination of the metal particle size (d) of palladium supported on zeolite NaY have been studied.d Values determined by H2 chemisorption, O2−H2 and H2−O2 titration and transmission electron microscopy are in fairly good agreement. O2 and CO chemisorption yields substantially higher values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062503
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  • 5
    Electronic Resource
    Electronic Resource
    Catalytic activity of perovskite-type oxides LaMeO3 (1980)
    Springer
    Reaction kinetics and catalysis letters 15 (1980), S. 185-191 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Были измерены каталитические активности ряда окислов, типа перовскитов LaMeO3 (Me+3=V+3, Cr+3, Mn+3, Fe+3, Co+3, Ni+3) в окислении CO. Максимумы были найдены для Mn+3 и Co+3. Обсуждается зависимость между местной Симметрией твердых поверхностей, хемосорбцией и катализом.
    Notes: Abstract Catalytic activities for CO oxidation of a series of LaMeO3(Me3+=V3+, Cr3+, Mn3+, Fe3+, Co3+, Ni3+) perovskite-type oxides were measured. Maxima for Mn3+ and Co3+ were found. The relation between local symmetry of solid surfaces and chemisorption and catalysis is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062430
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  • 6
    Electronic Resource
    Electronic Resource
    Acidity and oxidation activity of MoO3−UO3/SiO2 catalysts (1988)
    Springer
    Reaction kinetics and catalysis letters 36 (1988), S. 235-240 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Влияние UO3 на кислотность катализаторов MoO3−UO3/SiO2 исследовали с помощью ИК спектроскопии адсорбированного пиридина. Поверхностная кислотность достигает максимума при том же значении атомного отношения U/(U+Mo)=0,11, при котором наблюдалось максимальное общее превращение в окислении изобутилена. Каталитические свойства окисления обсуждаются, исходя из кислотных свойств образцов.
    Notes: Abstract The effect of UO3 on the acidity of MoO3−UO3/SiO2 catalysts has been studied by means of infrared spectroscopy of adsorbed pyridine. The surface acidity exhibited a maximum for the same U/(U+Mo) atomic ratio (=0.11) that yielded a maximum in total conversion for isobutene oxidation. The catalytic properties for oxidation are discussed in terms of the acidic properties of the samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071170
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    Paper (German National Licenses)
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