Migration of potassium on iron and alumina surfaces as studied by Auger electron spectroscopy
作者： Glen Connell , JA Dumesic
DOI: 10.1016/0021-9517(85)90233-7
关键词:
摘要: Abstract The migration of potassium on model iron and alumina surfaces was studied with Auger electron spectroscopy. extent at 670 K found to be dependent the gasphase composition during treatment. In particular, mobility greater in hydrogen than oxygen, either gas increased by addition H2O. kinetics are consistent a surface-stabilized species. After initial vaporphase transport volatile, bulk species, surface diffusion controls migration. Potassium appears bonded comparable strengths surfaces.
elsevier.com
sci-hub.se 参考文章(14)
Hughes D, Davies P, STEAM REFORMING CATALYSTS ,(1973)
Anders Nielsen, An investigation on promoted iron catalysts for the synthesis of ammonia Gjellerups. ,(1956)
J VANOMMEN, The nature of the potassium compound acting as a promoter in iron-alumina catalysts for ammonia synthesis Journal of Catalysis. ,vol. 38, pp. 120- 127 ,(1975) , 10.1016/0021-9517(75)90069-X
H CHEN, Studies of a triply promoted ammonia synthesis catalyst with an electron probe microanalyzer Journal of Catalysis. ,vol. 28, pp. 161- 173 ,(1973) , 10.1016/0021-9517(73)90190-5
Thomas K. Sherwood, Robert E. Street, Robert C. Reid, The Properties of Gases and Liquids ,(1977)
G Ertl, D Prigge, R Schloegl, M Weiss, Surface characterization of ammonia synthesis catalysts Journal of Catalysis. ,vol. 79, pp. 359- 377 ,(1983) , 10.1016/0021-9517(83)90330-5
E Ruckenstein, ML Malhotra, Splitting of platinum crystallites supported on thin, nonporous alumina films Journal of Catalysis. ,vol. 41, pp. 303- 311 ,(1976) , 10.1016/0021-9517(76)90345-6
W. D. Mross, Alkali Doping in Heterogeneous Catalysis Catalysis Reviews-science and Engineering. ,vol. 25, pp. 591- 637 ,(1983) , 10.1080/01614948308078057
DC Silverman, M Boudart, Surface composition of promoted iron catalysts Journal of Catalysis. ,vol. 77, pp. 208- 220 ,(1982) , 10.1016/0021-9517(82)90161-0
G. Ertl, S.B. Lee, M. Weiss, Adsorption of nitrogen on potassium promoted Fe(111) and (100) surfaces Surface Science. ,vol. 114, pp. 527- 545 ,(1982) , 10.1016/0039-6028(82)90703-8