Abstract
Applying a synthesis procedure that promotes alloy formation, highly-dispersed alumina-supported Pt–Pd catalysts spanning the Pt-rich half of the composition range were prepared, aged under oxygen-rich hydrothermal conditions, and characterized by CO chemisorption, XRD, and TEM. Anomalously large particles, typical of pure Pt catalysts treated under such conditions, were not found in any of the Pd-containing catalysts, and the extent of particle coarsening due to aging was found to decrease with increasing Pd content. Alloying appears to have little effect on the NO oxidation turn-over frequency, which increases with decreasing dispersion.
Similar content being viewed by others
References
Takahashi N., Shinjoh H., Iijima T., Suzuki T., Yamazaki K., Yokota K., Suzuki H., Miyoshi S., Matsumoto S., Tanizawa T., Tanaka T., Tateishi S., Kasahara K. (1996) . Catal. Today 27:63
Li M., Henao J., Yeom Y., Weitz E., Sachtler W.M.H. (2004) . Catal. Lett. 98:5
P. Hawker, N. Myers, G. Huthwohl, H.T. Vogel, B. Bates, L. Magnusson and P. Bronnenberg, Society of Automotive Engineers, Paper No. 970182, 1997
Graham G.W., Jen H.-W., Chun W., Sun H.P., Pan X.Q., McCabe R.W. (2004). Catal. Lett. 93:129
Chen M., Schmidt L.D. (1979). J. Catal. 56:198
Morlang A., Neuhausen U., Klementiev K.V., Schutze F.-W., Miehe G., Fuess H., Lox E.S. (2005). Appl. Catal. B 60:195
R.J. Kudla, H.-W. Jen, P.J. Schmitz, C.T. Goralski Jr., R.W. McCabe and G.W. Graham, 19th NACS (2005).
Renouprez A., Malhomme A., Massardier J., Cattenot M., Bergeret G. (2000). Stud. Surf. Sci. Catal. 130C:2579
Morfin F., Sabroux J.-C., Renouprez A. (2004). Appl. Catal. B 47: 47
Wei L., Li T. (1997). Micros. Res. Tech. 36(5):380
Schmitz P.J., Kudla R.J., Drews A.R., Chen A.E., Lowe-Ma C.K., McCabe R.W., Schneider W.F., Goralski C.T. Jr. (2006). Appl. Catal. B 67:246
R.L. Moss, in: Experimental Methods in Catalytic Research, eds. R.B. Anderson and P. T. Dawson (Academic Press, New York, 1976) p. 74
Bourane A., Derrouiche S., Bianchi D. (2004). J. Catal. 228:228
Skotak M., Karpinski Z., Juszczyk W., Pielaszek J., Kepinski L., Kazachkin D.V., Kovalchuk V.I., d’Itri J.L. (2004). J. Catal. 227:11
Benkhaled M., Morin S., Ch. Pichon, Thomazeau C., Verdon C., Uzio D. (2006). Appl. Catal. A 312:1
Xu X., Goodman D.W. (1993). J. Phys. Chem. 97:7711
Graham G.W., Sun H., Jen H.-W., Pan X.Q., McCabe R.W. (2002). Catal. Lett. 81:1
Lee J.-H., Kung H.H. (1998). Catal. Lett. 51:1
Mulla S.S., Chen N., Cumaranatunge L., Blau G.E., Zemlyanov D.Y., Delgass W.N., Epling W.S., Ribeiro F.H. (2006). J. Catal. 241:389
H.-W. Jen (unpublished data)
Acknowledgments
The authors gratefully acknowledge the support of C. T. Goralski, Jr. during the early stages of this work, useful discussions with P. J. Schmitz, A. R. Drews, and S. J. Harris on the subject of NO oxidation, and technical assistance from J. Hangas. The JEOL 3011 TEM resides at EMAL, a facility of the University of Michigan, which is funded in part under NSF Grant DMR-9871177.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Graham, G.W., Jen, HW., Ezekoye, O. et al. Effect of alloy composition on dispersion stability and catalytic activity for NO oxidation over alumina-supported Pt–Pd catalysts. Catal Lett 116, 1–8 (2007). https://doi.org/10.1007/s10562-007-9124-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10562-007-9124-7