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Catalytic oxidation of hydrogen on lamellar compounds of graphite with transition metals. II. Relation between catalytic activity and catalyst composition and properties

Journal Article · · Kinet. Catal. (Engl. Transl.); (United States)
OSTI ID:5318792
When hydrogen is oxidized in a gas mixture containing excess oxygen, the catalytic activity of lamellar graphite compounds (LGC) with transition metals decreases in the order: LGC-Pt>LGC-Pd>LGC-Ru>LGC-Ni>LGC-Co>LGC-Fe and the metal-oxygen bond energies change in reverse order. This is explained by the fact that the reaction rate is determined by the reaction rate between H/sub 2/ and adsorbed oxygen. During catalysis on lamellar graphic compounds with platinum metals the activation entropy is substantially higher than for lamellar graphite compounds with metals of the iron subgroup. During catalysis with an excess of H/sub 2/ the activity decreases in the order: LGC-Pt>LGC-Ru>LGC-Pd>LGC-Ni>LGC-Co>LGC-Fe.
OSTI ID:
5318792
Journal Information:
Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 22:2; ISSN KICAA
Country of Publication:
United States
Language:
English