Abstract
The local environments about the rhenium atoms in a Co–Re/γ-Al2O3 catalyst after different reduction periods have been studied by X-ray absorption spectroscopy (EXAFS). The bimetallic catalyst containing 4.6 wt% cobalt and 2 wt% rhenium has been compared with a corresponding monometallic sample with 2 wt% rhenium on the same support. The rhenium LIII EXAFS analysis shows that bimetallic particles are formed after reduction at 450 ○C with the average particle size being less than 15 Å. More than 6 h reduction at 450 ○C is required for complete reduction of accessible rhenium.
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References
H. Schulz, Appl. Catal. A 186 (1999) 3.
J.J.C. Geerlings,J.H. Wilson,G.J. Kramer,H.P.C.E. Kuipers,A. Hoek andH.M. Huisman, Appl. Catal. A 186 (1999) 27.
S. Eri and J.G. Goodwin, US Patent 4 857 599 (1989).
S. Eri, J.G. Goodwin and T. Riis, US Patent 4 801 573 (1989).
S. Eri, J.G. Goodwin and T. Riis, US Patent 4 880 763 (1989).
Y. Borodko andG.A. Somorjai, Appl. Catal. A 186 (1999) 355.
E. Iglesia, Appl. Catal. A 161 (1997) 59.
E. Iglesia,S.L. Soled,R.A. Fiato andG.H. Via, J. Catal. 143 (1993) 345.
G.P. Huffman,N. Shah,J. Zhao,F.E. Huggins,T.E. Hoost,S. Halvorsen andJ.G. Goodwin, Jr., J. Catal. 151 (1995) 17.
B. Ernst,A. Bensaddik,L. Hilaire,P. Chaumette andA. Kiennemann, Catal. Today 39 (1998) 329.
L. Chin andD.M. Hercules, J. Phys. Chem. 86 (1982) 360.
D. Schanke,A.M. Hilmen,E. Bergene,K. Kinnari,E. Rytter,E. Ådnanes andA. Holmen, Catal. Lett. 34 (1995) 269.
A. Moen,D.G. Nicholson,M. Rønning andH. Emerich, J. Mater. Chem. 8 (1998) 2533.
F.B. Noronha,M. Schmal,R. Frety,G. Bergeret andB. Moraweck, J. Catal. 186 (1999) 20.
Z. Zsoldos andL. Guczi, J. Phys. Chem. 96 (1992) 9393.
B. Moraweck,R. Frety,G. Pecchi,M. Morales andP. Reyes, Catal. Lett. 43 (1997) 85.
H.C. Yao andM. Shelef, J. Catal. 44 (1976) 392.
R. Prestvik,B. Tøtdal,C.E. Lyman andA. Holmen, J. Catal. 176 (1998) 246.
A.S. Fung,M.J. Kelley,D.C. Koningsberger andB.C. Gates, J. Am. Chem. Soc. 119 (1997) 5877.
International Tables for X-ray Crystallography, Vol. 3 (Kynoch Press, Birmingham, 1962) p. 175.
F.W. Lytle,R.B. Greegor,E.C. Marques,D.R. Sandstrom,G.H. Via andJ.H. Sinfelt, J. Catal. 95 (1985) 546.
N. Binsted,J.W. Campbell,S.J. Gurman andP.C. Stephenson, EXCALIB, EXBACK and EXCURV90 programs, SERC Daresbury Laboratory (1990).
S.J. Gurman,N. Binsted andI. Ross, J. Phys. C 17 (1984) 143.
F.W.H. Kampers,C.W.R. Engelen,J.H.C. van Hooff andD.C. Koningsberger, J. Phys. Chem. 94 (1990) 8574.
D.C. Koningsberger andR. Prins, ed. X-ray Absorption: Principles, Applications, Techniques of EXAFS, SEXAFS and XANES (Wiley, New York, 1988).
F.W. Lytle,D.E. Sayers andE.A. Stern, eds., Physica B 158 (1989) 701; Chichester, 1991).
M. Vaarkamp, Catal. Today 39 (1998) 271.
International Tables of X-ray Crystallography, Vol. 3 (Kynock Press, Birmingham, 1962) p. 281.
R.J.C. Brown,S.L. Segel andG. Dolling, Acta Crystallogr. B 36 (1980) 2195.
K. Meisel, Z. Anorg. Allg. Chem. 207 (1932) 121.
S. Vada,A. Hoff,E. Ådnanes,D. Schanke andA. Holmen, Topics Catal. 2 (1995) 155.
D. Schanke,S. Vada,E.A. Blekkan,A.M. Hilmen,A. Hoff andA. Holmen, J. Catal. 155 (1995) 85.
S.M. Augustine andW.M.H. Sachtler, J. Catal. 116 (1989) 184.
B.J. Kip,F.B.M. Duivenvoorden,D.C. Koningsberger andR. Prins, J. Catal. 105 (1987) 26.
B.S. Clausen,H. Topsøe,L.B. Hansen,P. Stolze andJ.K. Nørskov, J. Catal. 114 (1994) 463.
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Rønning, M., Nicholson, D.G. & Holmen, A. In situ EXAFS study of the bimetallic interaction in a rhenium-promoted alumina-supported cobalt Fischer–Tropsch catalyst. Catalysis Letters 72, 141–146 (2001). https://doi.org/10.1023/A:1009005808189
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DOI: https://doi.org/10.1023/A:1009005808189