✦ LIBER ✦

Surface Praseodymium Species on MgO: Characterization and Activity for Oxidative Coupling of Methane

✍ Scribed by Graciela T. Baronetti; Walter E. Grosso; Silvia P. Maina; Cristina L. Padró; Alberto A. Castro; Osvaldo A. Scelza; José M. Palacios Latasa

Publisher: Wiley (John Wiley & Sons)
Year: 1997
Tongue: English
Weight: 407 KB
Volume: 70
Category: Article
ISSN: 0268-2575
DOI: 10.1002/(sici)1097-4660(199710)70:2<141::aid-jctb742>3.0.co;2-o

No coin nor oath required. For personal study only.

✦ Synopsis

On pulsing over MgO containing various amounts of praseodym-CH 4 ium oxide at 1023 K, the conversion decreased with increasing pulse (PrO x ) C H 4 number, and both the initial activity and selectivity to products C 2 (corresponding to the Ðrst pulse) decreased with increasing content. Char-PrO x acterization by XRD, SEM-EDX and XPS showed calcined materials to contain well-dispersed (x \ 1É83È2) at low Pr concentrations, but only crystalline PrO x at high (10 wt%) Pr concentration. A phase was present at all PrO 1Õ83 PrO 1Õ83 Pr concentrations after the He treatment at 1023 K, and and PrO 1Õ83 , PrO 1Õ75 after reaction. PrO 1Õ5

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