Silica Nanocomposites: A New Class

network. This material combines the excellent solid acid catalyst properties of Nafion resin with the ... resins represent one class of potential soli...
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7708

J. Am. Chem. Soc. 1996, 118, 7708-7715

High Surface Area Nafion† Resin/Silica Nanocomposites: A New Class of Solid Acid Catalyst Mark A. Harmer,* William E. Farneth, and Qun Sun Contribution from Central Research and DeVelopment, DuPont Company, Wilmington, Delaware 19880-0356 ReceiVed December 14, 1995. ReVised Manuscript ReceiVed June 8, 1996X

Abstract: Nafion resin, a perfluorinated ion-exchange polymer, has been used as a heterogeneous strong acid catalyst for a range of reactions; however, in nonpolar solvents or for gas phase reactions the activity is limited due to the extremely low surface area of the polymer beads (