Ch. Yoon et al., REACTIONS OF 1-BUTENE AND CIS-2-BUTENE ON PLATINUM SURFACES - STRUCTURE SENSITIVITY OF CIS-2-BUTENE ISOMERIZATION, Journal of catalysis, 176(1), 1998, pp. 35-41
The hydrogenation and isomerization of 1-butene and cis-2-butene molec
ules are studied on platinum foil and single crystal (111), (100), and
the stepped (755) surfaces at 300-350 K. In the presence of hydrogen,
1-butene and cis-2-butene are hydrogenated to butane. In addition, 1-
butene is isomerized to cis-and trans-2-butenes, while cis-2-butene is
converted to trans-2-butene. With a hydrogen pressure between 7 and 5
00 Torr, and a butene pressure of 3.5-70 Torr, both butene hydrogenati
on and isomerization rates exhibit a near-first-order dependence on th
e hydrogen pressure and a zero-order dependence on the hydrocarbon pre
ssures. For both 1-butene and cis-2-butene molecules, the hydrogenatio
n rates are insensitive to surface structures. The isomerization rate,
however, is doubled for cis-2-butene molecules on the stepped platinu
m surface (Pt(755)). (C) 1998 Academic Press.