Abstract
The textural properties of non-irradiated and γ-irradiated Ni/Al2O3 and Co/Al2O3 systems with different chemical compositions were determined from the adsorption of nitrogen at 77 K. Chemisorption of hydrogen at 320 K and hydrogenation of benzene at 400 K were studied on the reduced catalysts.
The surface areas of γ-irradiated catalysts are higher than those of their non-irradiated equivalents. γ-Irradiation also increases the hydrogen uptake, the metallic surface area and the percentage dispersion of the metal on the support. The hydrogenation activity also increases upon irradiation with γ-rays. All these changes are more pronounced in catalysts with a high metal loading.
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References
1.
Abou-Kais
A.
(1985 ) Acta Phys. 31 , 109 .
2.
Amin
N.H.
El-Shobaky
G.A.
Fagal
G.A.
(1994 ) J. Radioanal. Nucl. Chem., Art. 177 , 211 .
3.
Anderson
J.R.
(1957a ) Structure of Metallic Catalysts , Academic Press , London, UK , pp. 307 , 347 .
4.
Anderson
J.R.
(1957b ) Structure of Metallic Catalysts , Academic Press , London, UK , p. 296 .
5.
Anderson
J.R.
Kemball
C.
(1957 ) Adv. Catal. 9 ,51 .
6.
Brunauer
S.
Emmett
P.H.
Teller
E.
(1938 ) J. Am. Chem. Soc. 60 , 309 .
7.
del Angel
G.
Coq
B.
Ferrat
G.
Figueras
F.
Fuentes
S.
(1985 ) Surf. Sci. 156 , 943 .
8.
El-Shobaky
G.A.
El-Nabarawy
Th.
Dessouki
A.M.
(1989 ) J. Radiat. Phys. Chem. 33 , 23 .
9.
Kambell
V.H.
Gupta
N.M.
Natarajan
V.
Iyer
R.M.
(1990 ) J. Mol. Catal. 61 , 269 .
10.
Klyuer
M.V.
Nasibulin
A.A.
(1990 ) Kinet. Katal. 31 , 987 .
11.
Molt
A.
(1987 ) Collect. Czech. Chem. Commun. 52 , 2383 .
12.
Roberts
M.W.
Sykes
K.W.
(1958 ) Trans. Faraday Soc. 54 , 548 .
13.
Schuit
G.C.A.
de Boer
N.H.
(1951 ) Recl. Trav. Chim. Pays-Bas 70 , 1067 .
14.
Schuit
G.C.A.
de Boer
N.H.
(1954 ) Nature (London) 168 , 1040 .
15.
Sing
K.S.W.
Everett
D.H.
Haul
R.A.W.
Moscou
L.
Pierotti
R.A.
Roquerol
J.
Siemieniewska
T.
(1985 ) Pure Appl. Chem. 57 , 604 .
16.
Sivaraj
C.
Kantarao
P.
(1988 ) Appl. Catal. 45 , 103 .
17.
Sternberg
A.
Rubulis
A.
Shebanov
L.R.
Dindun
S.
Ulmanis
U.
(1989 ) Ferroelectrics 90 , 89 .
18.
Tompkins
F.C.
(1952 ) Z. Elektrochem. 56 , 360 .
19.
Venkataraman
V.M.
Sangaiah
R.
Gutala
S.
Sankarasubbier
N.
(1991 ) J. Chem. Soc., Faraday Trans. 1 87 , 3449 .
20.
Yao
H.C.
Japar
S.
Shelef
M.
(1977 ) J. Catal. 50 , 407 .
21.
Youssef
A.M.
El-Nabarawy
Th.
(1988 ) J. Serbian Chem. Soc. 53 , 377 .
22.
Youssef
A.M.
Mostafa
M.R.
(1988 ) Bull. Soc. Chim. Fr. 807 .
23.
Youssef
A.M.
Ahmed
A.I.
Samra
S.E.
(1991 ) Indian J. Chem. 30A , 557 .
24.
Youssef
A.M.
El-Hakam
S.E.
El-Shobaky
G.A.
(1992a ) J. Radiat. Phys. Chem. 40 , 575 .
25.
Youssef
A.M.
El-Kherbawy
M.A.
Samra
S.A.
(1992b ) J. Radiat. Phys. Chem. 40 , 559 .
26.
Youssef
A.M.
El-Nabarawy
Th.
Mostafa
M.R.
(1990 ) J. Radiat. Phys. Chem. 36 , 349 .
27.
Youssef
A.M.
Hamada
M.A.
Nawar
N.
(1993 ) Mater. Lett. 15 , 386 .
28.
Youssef
A.M.
Hassan
S.M.
Ahmed
A.I.
(1984 ) Egypt. J. Chem. 27 , 219 .
29.
Youssef
A.M.
Kira
A.I.
Selim
M.M.
(1981 ) Egypt. J. Chem. 24 , 357 .