Characterization and catalytic activity of unpromoted and alkali (earth)-promoted Au/Al2O3 catalysts for low-temperature CO oxidation
作者： A. C. Gluhoi , X. Tang , P. Marginean , B. E. Nieuwenhuys
DOI: 10.1007/S11244-006-0043-4
关键词: Alkali metal 、 Catalysis 、 Oxide 、 Inorganic chemistry 、 Earth (classical element) 、 Metal 、 Alkaline earth metal 、 Chemistry 、 High-resolution transmission electron microscopy
摘要: Various unpromoted and alkali (earth) promoted gold catalysts were characterized by means of XRD, HRTEM, DR/UV–Vis TPR. Based on the results we conclude that metallic Au is active species in CO oxidation reduction Au3+ to Au0 proceeds below 200 °C. Pretreatment at mild temperatures, viz. 200 °C, highest catalytic performance Au/Al2O3 low-temperature oxidation. Alkali metal oxide additives are most probably structural promoters. The best promoting effect found for BaO.
springer.com
sci-hub.se 参考文章(45)
David T Thompson, Geoffrey C Bond, Catherine Louis, Catalysis By Gold ,(2006)
N.A Hodge, C.J Kiely, R Whyman, M.R.H Siddiqui, G.J Hutchings, Q.A Pankhurst, F.E Wagner, R.R Rajaram, S.E Golunski, Microstructural comparison of calcined and uncalcined gold/iron-oxide catalysts for low-temperature CO oxidation Catalysis Today. ,vol. 72, pp. 133- 144 ,(2002) , 10.1016/S0920-5861(01)00487-4
A GLUHOI, N BOGDANCHIKOVA, B NIEUWENHUYS, Alkali (earth)-doped Au/Al2O3 catalysts for the total oxidation of propene Journal of Catalysis. ,vol. 232, pp. 96- 101 ,(2005) , 10.1016/J.JCAT.2005.02.016
J.L Margitfalvi, A Fási, M Hegedűs, F Lónyi, S Gőbölös, N Bogdanchikova, Au/MgO catalysts modified with ascorbic acid for low temperature CO oxidation Catalysis Today. ,vol. 72, pp. 157- 169 ,(2002) , 10.1016/S0920-5861(01)00489-8
A.C Gluhoi, M.A.P Dekkers, B.E Nieuwenhuys, Comparative studies of the N2O/H2, N2O/CO, H2/O2 and CO/O2 reactions on supported gold catalysts: effect of the addition of various oxides Journal of Catalysis. ,vol. 219, pp. 197- 205 ,(2003) , 10.1016/S0021-9517(03)00185-4
L. M. Molina, B. Hammer, Active role of oxide support during CO oxidation at Au/MgO. Physical Review Letters. ,vol. 90, pp. 206102- 206102 ,(2003) , 10.1103/PHYSREVLETT.90.206102
Stephan Link, Mostafa A. El-Sayed, Size and temperature dependence of the plasmon absorption of colloidal gold nanoparticles Journal of Physical Chemistry B. ,vol. 103, pp. 4212- 4217 ,(1999) , 10.1021/JP984796O
Ioannis N. Remediakis, Nuria Lopez, Jens K. Nørskov, CO oxidation on rutile-supported au nanoparticles. Angewandte Chemie. ,vol. 44, pp. 1824- 1826 ,(2005) , 10.1002/ANIE.200461699
M. Haruta, Gold as a low-temperature oxidation catalyst: factors controlling activity and selectivity Studies in Surface Science and Catalysis. ,vol. 110, pp. 123- 134 ,(1997) , 10.1016/S0167-2991(97)80974-3
Susumu Tsubota, Toshiko Nakamura, Koji Tanaka, Masatake Haruta, Effect of calcination temperature on the catalytic activity of Au colloids mechanically mixed with TiO2 powder for CO oxidation Catalysis Letters. ,vol. 56, pp. 131- 135 ,(1998) , 10.1023/A:1019069315071