The reaction of ethylene on a model automotive emissions control catalyst

被引：12

作者：

Ferrizz, RM ^{[1
]}

Egami, T

Vohs, JM

机构：

[1] Univ Penn, Dept Chem Engn, Philadelphia, PA 19104 USA

[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

CATALYSIS LETTERS | 1999年 / 61卷 / 1-2期

关键词：

ceria; emissions control; Rh; ethylene;

D O I：

10.1023/A:1019012619924

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 reaction of ethylene on a model automotive emissions control catalyst consisting of Rh particles on an epitaxial ceria film grown on the (100) surface of an yttria-stabilized zirconia single crystal was studied using TPD. The TPD results showed that ethylene undergoes dehydrogenation on the model catalyst at temperatures below 500 K depositing carbon on the Rh particles. Surface carbon formed in this manner was oxidized to CO upon heating to above 550 K using oxygen supplied by the ceria lattice. Heating to 900 K was found to induce reduction of the ceria film resulting in a marked decrease in oxidation activity.

引用

页码：33 / 38

页数：6

共 23 条

[1] INFRARED SPECTROSCOPIC INVESTIGATION OF THE ETHYLENE CHEMISORPTION REACTION ON SUPPORTED METALLIC CATALYST SURFACES - ETHYLIDYNE FORMATION ON PT, RH, PD, AND RU SUPPORTED ON ALUMINA [J].

BEEBE, TP ;

YATES, JT .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (02) :254-257

[2] MOLECULAR ETHYLENE ADSORPTION ON RH(111) AND RH(100) - ESTIMATION OF THE C-C STRETCHING FORCE-CONSTANT FROM THE SURFACE VIBRATIONAL FREQUENCIES [J].

BENT, BE ;

MATE, CM ;

KAO, CT ;

SLAVIN, AJ ;

SOMORJAI, GA .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (16) :4720-4726

[3]

CALHORDA MJ, 1994, J MOL CATAL A-CHEM, V97, P157

[4] Structure of oxide overlayer studied by energy dispersive X-ray diffraction [J].

Dmowski, W ;

Egami, T ;

Gorte, R ;

Vohs, J .

PHYSICA B, 1996, 221 (1-4) :420-425

[5] THE CHEMISORPTION OF ACETYLENE AND ETHYLENE ON RH(111) - A LOW-ENERGY ELECTRON-DIFFRACTION (LEED), HIGH-RESOLUTION ELECTRON-ENERGY LOSS (ELS), AND THERMAL-DESORPTION MASS-SPECTROMETRY (TDS) STUDY [J].

DUBOIS, LH ;

CASTNER, DG ;

SOMORJAI, GA .

JOURNAL OF CHEMICAL PHYSICS, 1980, 72 (09) :5234-5240

[6]

GANDHI HS, 1987, STUD SURF SCI CATAL, V30, P199

[7] OXYGEN STORAGE CAPACITY OF ALUMINA-SUPPORTED RH/CEO2 CATALYST [J].

HANEDA, M ;

MIKI, T ;

KAKUTA, N ;

UENO, A ;

TATEISHI, S ;

MATSUURA, S ;

SATO, M .

NIPPON KAGAKU KAISHI, 1990, (08) :820-823

[8]

HERZ RK, 1985, J CATAL, V94, P199

[9]

KIM G, 1982, IND ENG CHEM PROD RD, V32, P73

[10] HYDROGENATION AND H,D EXCHANGE STUDIES OF ETHYLIDYNE (CCH3) ON RH(111) CRYSTAL-SURFACES AT 1 ATM PRESSURE USING HIGH-RESOLUTION ELECTRON-ENERGY LOSS SPECTROSCOPY [J].

KOEL, BE ;

BENT, BE ;

SOMORJAI, GA .

SURFACE SCIENCE, 1984, 146 (01) :211-228

← 1 2 3 →