The influence of La-doping on the activity and stability of Cu/ZnO catalyst for the low-temperature water-gas shift reaction

被引：86

作者：

Kam, Rothman ^{[2
]}

Selomulya, Cordelia ^{[2
]}

Amal, Rose ^{[1
]}

Scott, Jason ^{[1
]}

机构：

[1] Univ New S Wales, ARC Ctr Excellence Funct Nanomat, Sch Chem Sci & Engn, Sydney, NSW 2052, Australia

[2] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia

来源：

JOURNAL OF CATALYSIS | 2010年 / 273卷 / 01期

关键词：

Water-gas shift; Cu/ZnO; Lanthanum; H2O-TPD; CO-TPD; RAY PHOTOELECTRON-SPECTROSCOPY; METHANOL-SYNTHESIS CATALYSTS; SINGLE-CRYSTAL SURFACES; ZINC-OXIDE; IN-SITU; CO ADSORPTION; ONE-STEP; ZNO; CU; NANOSTRUCTURES;

D O I：

10.1016/j.jcat.2010.05.004

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 influence of lanthanum (La) doping on the performance of 37 wt% Cu/ZnO catalysts for the low-temperature water-gas shift (LT-WGS) reaction was investigated. A 2.3 wt% La loading improved catalyst activity compared to the neat Cu/ZnO and Cu/ZnO/Al2O3 systems and was accompanied by a lowering of the activation energy. Higher La loadings promoted the adsorption of H2O at the expense of CO, resulting in a decrease in LT-WGS activity. Additionally, 2.3 wt% La acted to stabilise catalyst activity compared with the neat Cu/ZnO. XPS and H-2-TPR assessment demonstrated a strong interaction between Cu and La components, while data from CO and H2O-TPD studies favoured the associative WGS mechanism in this instance. Activity and stability findings also suggested metallic Cu was not responsible for LT-WGS activity. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：73 / 81

页数：9

共 59 条

[1] ALKALI-PROMOTED ALUMINA CATALYSTS .2. WATER-GAS SHIFT REACTION
AMENOMIYA, Y
PLEIZIER, G
[J]. JOURNAL OF CATALYSIS, 1982, 76 (02) : 345 - 353
[2] SUBLIMATION + THERMODYNAMIC PROPERTIES OF ZINC OXIDE
ANTHROP, DF
SEARCY, AW
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (08) : 2335 - +
[3] Bartholomew CH, 2006, FUNDAMENTALS OF INDUSTRIAL CATALYTIC PROCESSES, 2ND EDITION, P1, DOI 10.1002/9780471730071
[4] Pt- and Pd-catalysed limonene hydrogenation in high-density carbon dioxide
Bogel-Lukasik, Ewa
Bogel-Lukasik, Rafal
da Ponte, Manuel Nunes
[J]. MONATSHEFTE FUR CHEMIE, 2009, 140 (11): : 1361 - 1369
[5] SYNERGY AT A DISTANCE IN THE SYNTHESIS OF METHANOL OVER COPPER CATALYSTS
Burch, R.
Chappell, R. J.
Golunski, S. E.
[J]. CATALYSIS LETTERS, 1988, 1 (12) : 439 - 443
[6] SYNTHESIS OF METHANOL .1. CATALYSTS AND KINETICS
CHINCHEN, GC
DENNY, PJ
JENNINGS, JR
SPENCER, MS
WAUGH, KC
[J]. APPLIED CATALYSIS, 1988, 36 (1-2): : 1 - 65
[7] PROMOTION OF METHANOL SYNTHESIS AND THE WATER-GAS SHIFT REACTIONS BY ADSORBED OXYGEN ON SUPPORTED COPPER-CATALYSTS
CHINCHEN, GC
SPENCER, MS
WAUGH, KC
WHAN, DA
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1987, 83 : 2193 - 2212
[8] Correlation of relative X-ray photoelectron spectroscopy shake-up intensity with CuO particle size
Chusuei, CC
Brookshier, MA
Goodman, DW
[J]. LANGMUIR, 1999, 15 (08) : 2806 - 2808
[9] INTERACTION OF CO WITH CU+ CATIONS - CO ADSORPTION ON CU2O(100)
COX, DF
SCHULZ, KH
[J]. SURFACE SCIENCE, 1991, 249 (1-3) : 138 - 148
[10] XPS studies of Cu/ZnO/Al2O3 ultra-fine catalysts derived by a novel gel oxalate co-precipitation for methanol synthesis by CO2+H2
Dai, WL
Sun, Q
Deng, JF
Wu, D
Sun, YH
[J]. APPLIED SURFACE SCIENCE, 2001, 177 (03) : 172 - 179

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