In situ infrared study of catalytic decomposition of NO. Semiannual technical progress report, February 1--August 1, 1996 | Zendy

Steven S.C. Chuang | Zendy; C.D. Tan | Zendy

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In situ infrared study of catalytic decomposition of NO. Semiannual technical progress report, February 1--August 1, 1996

Author(s) -

Steven S.C. Chuang,

C.D. Tan

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/418430

Subject(s) - desorption , catalysis , decomposition , oxygen , chemistry , adsorption , oxide , inorganic chemistry , in situ , analytical chemistry (journal) , organic chemistry

During the second semi-annual period, promotion of oxygen desorption to enhance direct NO decomposition over Tb-Pt/Al{sub 2}O{sub 3} catalyst has been studied. Promotion of oxygen desorption at low temperatures holds the key to the development of an effective NO decomposition catalyst. Addition of Tb-oxide to Pt/Al{sub 2}O{sub 3} allows oxygen from dissociated NO to desorb at 593 K which is significantly lower than the reported oxygen desorption temperatures for Pt catalysts. Combined temperature-programmed desorption/reaction with in situ infrared study reveals that desorbed oxygen is produced from decomposition of chelating bidentate nitrato which may be resulted from the reaction of adsorbed oxygen on Pt and adsorbed NO on Tb-oxide. The Tb-promoted Pt/Al{sub 2}O{sub 3} catalyst which possess oxygen desorption capability at low temperatures shows the activity for decomposition of NO to N{sub 2}, N{sub 2}O, and O{sub 2} at 723 K

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