Abstract
Silica-supported Pt/SnOx catalysts used for low-temperature CO oxidation have been prepared without and with an Fe promoter. Reaction studies demonstrate that the addition of the Fe promoter results in higher catalytic activity in the presence of 8 at% CO2 and a lower decay rate. Ion scattering spectroscopy (ISS) has been used to examine the outermost atomic layers of the promoted and nonpromoted catalysts before and after activation by a reductive pretreatment. The nonpromoted catalyst exhibits agglomeration of the platinized tin oxide film exposing the catalytically inactive silica support. This agglomeration does not occur when Fe is present, and a large catalytically active surface area is maintained during the reduction.
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D.R. Schryer and G.B. Hoflund, eds.,Low-Temperature CO-Oxidation Catalysts for Long-Life CO 2 Lasers, NASA Conf. Proc. 3076 (1990).
R.K. Herz, in:Low-Temperature CO-Oxidation Catalysts for Long-Life CO 2 Lasers, eds. D.R. Schryer and G.B. Hoflund, NASA Conf. Proc. 3076 (1990) p. 21.
D.S. Stark, A. Crocker and G.J. Steward, J. Phys. E 16 (1983) 158.
D.S. Stark and M.R. Harris, J. Phys. E 16 (1983) 492.
J.E. Drawdy, G.B. Hoflund, S.D. Gardner, E. Yngvadottir and D.R. Schryer, Surf. Interf. Anal. 16 (1990) 369.
D.R. Schryer, B.T. Upchurch, J.D. Van Norman, K.G. Brown and J. Schryer, J. Catal. 122 (1990) 193.
D.R. Schryer, B.T. Upchurch, R.V. Hess, G.M. Wood, B.D. Sidney, I.M. Miller, K.G. Brown, J.D. Van Norman, J. Schryer, D.R. Brown, G.B. Hoflund and R.K. Herz, in:Low-Temperature CO-Oxidation Catalysts for Long-Life CO 2 Lasers, eds. D.R. Schryer and G.B. Hoflund, NASA Conf.Proc. 3076 (1990) p. 41.
D.R. Schryer, B.T. Upchurch, B.D. Sidney, K.G. Brown, G.B. Hoflund and R.K. Herz, J. Catal. 130 (1991) 314.
B.T. Upchurch, D.R. Schryer, G.M. Wood and R.V. Hess, in:Laser Applications in Meteorology and Earth and Atmospheric Remote Sensing, Proc. SPIE-International Society for Optical Engineering, ed. M.M. Sokoloski, SPIE, Bellingham, WA 1062 (1989) 287.
B.T. Upchurch, E.J. Kielin and I.M. Miller, in:Low-Temperature CO-Oxidation Catalysts for Long-Life CO 2 Lasers, eds. D.R. Schryer and G.B. Hoflund, NASA Conf. Proc. 3076 (1990) p. 69.
S.D. Gardner, G.B. Hoflund, D.R. Schryer and B.T. Upchurch, J. Phys. Chem. 95 (1991) 835.
M. Haruta, N. Yamada, T. Kobayashi and S. Iijima, J. Catal. 115 (1989) 301.
S. Tsubota, M. Haruta, T. Kobayashi, A. Ueda and Y. Nakahara, in:Preparation of Catalysts V, eds. G. Poncelet, P.A. Jacobs, P. Grange and B. Delmon (Elsevier, Amsterdam, 1991) p. 695.
T. Kobayashi, M. Haruta, H. Sano and M. Nakane, Sensors and Actuators 13 (1988) 339.
M. Haruta, T. Kobayashi, H. Sano and N. Yamada, Chem. Lett. (1987) 405.
W.S. Epling, G.B. Hoflund, J.F. Weaver, A.D. Hall and M. Haruta, to be published.
S.D. Gardner, G.B. Hoflund, D.R. Schryer, J. Schryer, B.T. Upchurch and E.J. Kielin, Langmuir 7 (1991) 2135.
S.D. Gardner, G.B. Hoflund, M.R. Davidson, H.A. Laitinen, D.R. Schryer and B.T. Upchurch, Langmuir 7 (1991) 2140.
S.D. Gardner, G.B. Hoflund, B.T. Upchurch, D.R. Schryer, E.J. Kielin and J. Schryer, J. Catal. 129 (1991) 114.
G.B. Hoflund, M.R. Davidson and G.R. Corallo, J. Vac. Sci. Technol. A 9 (1991) 2412.
R.E. Gilbert, D.F. Cox and G.B. Hoflund, Rev. Sci. Instr. 53 (1982) 1281.
J.D. Van Norman, K.G. Brown, J. Schryer, D.R. Schryer, B.T. Upchurch and B.D. Sidney, in:Low-Temperature CO-Oxidation Catalysts for Long-Life CO 2 Lasers, eds. D.R. Schryer and G.B. Hoflund, NASA Conf. Proc. 3076 (1990) p. 181.
S.D. Gardner, G.B. Hoflund, M.R. Davidson and D.R. Schryer, J. Catal. 115 (1989) 132.
C.F. Corallo and G.B. Hoflund, Surf. Interf. Anal. 12 (1988) 297.
D.A. Asbury and G.B. Hoflund, J. Vac. Sci. Technol. A 5 (1987) 1132.
G.B. Hoflund, Chem. Mater. 6 (1994) 562.
S.D. Gardner, G.B. Hoflund and D.R. Schryer, J. Catal. 119 (1989) 179.
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Hoflund, G.B., Upchurch, B.T., Kielin, E.J. et al. Influence of an Fe promoter on silica-supported Pt/SnO x catalysts used for low-temperature CO oxidation. Catal Lett 31, 133–141 (1995). https://doi.org/10.1007/BF00808827
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DOI: https://doi.org/10.1007/BF00808827