OXIDATION OF CO BY O2, NO, AND MIXTURES OF O2 AND NO OVER PD(100)

被引:28
作者
GRAHAM, GW
LOGAN, AD
SHELEF, M
机构
[1] Ford Motor Company, Mail Drop 3179/SRL, Dearborn, MI 48121-2053
关键词
D O I
10.1021/j100123a001
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The rate Of CO2 formation in each of the three reactant mixtures, CO + O2, CO + NO, and CO + O2 + NO, was measured over Pd(100) at partial pressures of 1 Torr and temperatures in the range 430-580 K. The rate in both CO + O2 and CO + NO followed the Arrhenius behavior; in CO + NO, the rate was about 2 orders of magnitude lower than in CO + O2, whereas the apparent activation energy was about 30% lower. The rate in CO + O2 + NO, however, was the same as in CO + O2 at temperatures above 480 K and was even greater at temperatures below 480 K. This behavior may be contrasted with that in the case of Rh, where the addition of NO to CO + O2 drastically reduces the rate Of CO2 formation.
引用
收藏
页码:5445 / 5446
页数:2
相关论文
共 8 条
[1]  
FISHER GB, 1988, 9TH P INT C CAT OTT, P1355
[2]   NO CHEMISORPTION ON SUPPORTED PD [J].
GRAHAM, GW .
SURFACE SCIENCE, 1992, 268 (1-3) :25-35
[3]   THE LOW-PRESSURE REACTION OF CARBON-MONOXIDE WITH NITROGEN MONOXIDE IN THE PRESENCE OF OXYGEN ON POLYCRYSTALLINE PLATINUM, PALLADIUM AND RHODIUM .2. INTRINSIC SELECTIVITIES [J].
HAHN, T ;
LINTZ, HG .
APPLIED SURFACE SCIENCE, 1989, 40 (1-2) :59-63
[4]  
LOGAN AD, 1992, J CATAL, V133, P179
[5]   ROLE OF NO IN INHIBITING CO OXIDATION OVER ALUMINA-SUPPORTED RHODIUM [J].
OH, SH ;
CARPENTER, JE .
JOURNAL OF CATALYSIS, 1986, 101 (01) :114-122
[6]   KINETICS OF CO OXIDATION BY O2 OR NO ON RH(111) AND RH(100) SINGLE-CRYSTALS [J].
PEDEN, CHF ;
GOODMAN, DW ;
BLAIR, DS ;
BERLOWITZ, PJ ;
FISHER, GB ;
OH, SH .
JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (06) :1563-1567
[7]   FORMATION OF A C(2X2) OVERLAYER OF NITROGEN ON PD(100) BY NO + CO REACTION OR NO + H2 REACTION [J].
YAMADA, T ;
MATSUO, I ;
NAKAMURA, J ;
XIE, MS ;
HIRANO, H ;
MATSUMOTO, Y ;
TANAKA, K .
SURFACE SCIENCE, 1990, 231 (03) :304-314
[8]  
YOST DM, 1946, SYSTEMATIC INORGANIC, P29