SPECTROSCOPIC CHARACTERIZATION OF THIN VANADIUM CARBIDE FILMS ON A VANADIUM(110) SURFACE - FORMATION, STABILITY, AND REACTIVITIES

被引:22
作者
CHEN, JG [1 ]
DEVRIES, BD [1 ]
FRUHBERGER, B [1 ]
KIM, CM [1 ]
LIU, ZM [1 ]
机构
[1] KYUNGPOOK NATL UNIV,DEPT CHEM,TAEGU 702701,SOUTH KOREA
来源
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS | 1995年 / 13卷 / 03期
关键词
D O I
10.1116/1.579735
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The surface properties of thin vanadium carbide films, produced on a V(110) surface, have been investigated by using a combination of high-resolution electron energy-loss spectroscopy, fluorescence-yield near-edge x-ray absorption spectroscopy (FYNES), and Auger electron spectroscopy (AES). Our results indicate that thin carbide films with a stoichiometry of VC can be produced by exposing V(110) to olefin molecules at 600 K. A comparison of the bulk-sensitive FYNES data with the relatively surface-sensitive AES results suggests that the average thickness of the VC film is greater than the penetration depth of Auger electrons for the C(KLL) and {LMM) transitions. Upon heating to 600–1050 K, the thin VC films most likely undergo a thermally induced clustering process, which is followed by a diffusion of carbon atoms into the bulk V(110). The surface reactivities of the carbide-modified surfaces are significantly different from those of either clean V(110) or oxygen-modified V(110), as will be demonstrated by the interactions of these surfaces with CO and ethylene molecules. © 1995, American Vacuum Society. All rights reserved.
引用
收藏
页码:1600 / 1605
页数:6
相关论文
共 21 条
[1]   SYNCHROTRON RADIATION STUDY OF CHEMISORPTIVE BONDING OF CO ON TRANSITION-METALS - POLARIZATION EFFECT ON IR(100) [J].
BRODEN, G ;
RHODIN, TN ;
BRUCKER, C ;
BENBOW, R ;
HURYCH, Z .
SURFACE SCIENCE, 1976, 59 (02) :593-611
[2]  
Chen J., UNPUB
[3]   A VIBRATIONAL INVESTIGATION OF THE STABILITY, MORPHOLOGY AND SURFACE REACTIVITY OF NIO ON NI(100) [J].
CHEN, JG ;
WEISEL, MD ;
HALL, RB .
SURFACE SCIENCE, 1991, 250 (1-3) :159-168
[4]   EFFECT OF CARBON MODIFICATION ON A VANADIUM(110) SURFACE - OBSERVATION OF SURFACE REACTIVITIES CHARACTERISTIC OF PLATINUM-GROUP METALS [J].
CHEN, JG ;
WEISEL, MD ;
LIU, ZM ;
WHITE, JM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (19) :8875-8876
[5]   A FLUORESCENCE-YIELD NEAR-EDGE SPECTROSCOPY (FYNES) INVESTIGATION OF THE REACTION-KINETICS OF NIO/NI(100) WITH HYDROGEN [J].
CHEN, JG ;
FISCHER, DA ;
HARDENBERGH, JH ;
HALL, RB .
SURFACE SCIENCE, 1992, 279 (1-2) :13-22
[6]   DIRECT VIBRATIONAL DETECTION OF SURFACE-REACTION CHANNELS LEADING TO CO DISSOCIATION AND TO ITS INHIBITION ON MO(110) [J].
CHEN, JG ;
COLAIANNI, ML ;
WEINBERG, WH ;
YATES, JT .
CHEMICAL PHYSICS LETTERS, 1991, 177 (02) :113-117
[7]  
CHEN JG, IN PRESS SURF SCI
[8]  
CHEN JG, IN PRESS J CATAL
[9]  
CHEN JG, IN PRESS TRANSITION
[10]  
ERTL G, 1974, MONOGRAPHS MODERN CH, V4, P7