Reduction of nitric oxide by hydrogen over Pt/. gamma. -Al/sub 2/O/sub 3/ as a function of metal loading

Journal Article · Fri Oct 31 23:00:00 EST 1980 · J. Catal.; (United States)

OSTI ID:6795309

Otto, K; Yao, H C

The reduction of nitric oxide by hydrogen on platinum, supported on ..gamma..-alumina, is evaluated as a function of Pt concentration in the range from 273 to 373/sup 0/K. Product distribution and apparent activation energy in this temperature range remain rather constant as the Pt atoms change from a dispersed phase to a particulate phase of distinct clusters. Measured per chemisorption site, atoms in the particulate phase are much more reactive than atoms in the dispersed phase. Optimum catalyst efficiency is reached at a Pt loading of about 5 wt%. Theoretical considerations, based on transition state theory, suggest that the dissociation of NO is rate determining.

• Research Organization: Ford Motor Co., Dearborn, MI
• OSTI ID: 6795309
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 66:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
REDUCTION
TRANSITION ELEMENTS