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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 470 (1980), S. 109-112 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Oxygen Perovskites of Type Ba3BIIIRuIrO9The black perovskites Ba3BIIIRuIrO9 with BIII = La, Nd, Sm, Gd, Dy, Er, Yb, In, Sc are isotypic. They crystallize in a hexagonal BaTiO3 structure (sequence (hcc)2). The mean oxydation state of the noble metal ions is +4.5.
    Notes: Die schwarzen Perowskite Ba3BIIIRuIrO9 mit BIII = La, Nd, Sm, Gd, Dy, Er, Yb, In, Sc sind isotyp. Sie kristallisieren in einer hexagonalen BaTiO3-Struktur (Sequenz (hcc)2). Die mittlere Oxydationsstufe der Edelmetallionen beträgt +4,5.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Mixed Valent Perovskites Ba3B3+Ru24,5+O9 - Catalytic Activity of Perovskite Oxides with Noble MetalsThe black compounds Ba3B3+Ru2O9 crystallize with B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y in a hexagonal BaTiO3 structure (6 L, sequence (hcc)2) with an ordered distribution (1:2 order) of B3+ and ruthenium (BO6 single octahedra; Ru2O9 double groups). The mean oxidation state of ruthenium is about +4.5. The properties are compared with that of other isotypic stacking polytypes Ba3B3+M24,5O9 (M2 = IrRu, Ir2, PtRu) and Ba3B2+M25+O9 (M = Ru, Ir).The results of activity tests concerning the efficiency of perovskite oxides with noble metals in respect of the oxidation of CO or CHx and the reduction of NOx are reported.
    Notes: Die schwarzen Verbindungen Ba3B3+Ru2O9 kristallisieren für B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, und Y in einer hexagonalen BaTiO3-Struktur (6 L; Sequenz (hcc)2) mit geordneter Verteilung (1:2 Ordnung) von B3+ und Ruthenium (BO6-Einzeloktaeder; Ru2O9-Doppelgruppen). Die mittlere Wertigkeit des Rutheniums liegt stets bei +4,5. Die Eigenschaften werden mit denjenigen anderer isotyper Stapelvarianten Ba3B3+M24,5+O9 (M2 = IrRu, Ir2 und PtRu) sowie Ba3B2+M25+O9 (M = Ru, Ir) verglichen.Die Ergebnisse von Aktivitäts-Tests über die Wirksamkeit von edelmetallhaltigen Sauerstoffperowskiten bei der Oxydation von CO bzw. CHx sowie der Reduktion von NOx werden mitgeteilt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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