Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 38, Issue 2, Pages 117-125Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-3373(02)00034-6
Keywords
methane combustion; supported Pd catalyst; spinel; interaction with support; structure sensitivity
Ask authors/readers for more resources
Mg-modified alumina supports were prepared in both impregnation and co-precipitation routes, and Pd catalyst was finally obtained by incipient wetness method. Catalysts supported on different oxides were characterized by means of conventional techniques like XRD, laser Raman, CO-pulse, N-2-adsorption, etc. It was demonstrated that dispersion of Pd component on unit BET surface area increased and PdO active phase crystallized well on account of the formation of MgAl2O4 spinel. Combined with temperature programmed reaction techniques (O-2-TPD, CH4-TPR, H-2-TPSR), three kinds of PdO species were identified on spinel support. Moreover, a moderate interaction between MgAl2O4 spinel oxide support and PdO was discovered and an epitaxy formation mechanism of the crystalline PdO species was suggested. For this novel PdO species satisfied the requirement of structural particularity for reaction with methane, it could serve as the active phase for methane combustion. As a result, prominent improvement on ignition performance was observed in following catalytic activity test. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available