Nickel(II) Phosphate VSB-5: A Magnetic Nanoporous Hydrogenation Catalyst with 24-Ring Tunnels A.K.C. thanks the Fondation de l'Ecole Normale Supérieure and the Région de l'Ile de France for a Chaire Internationale de Recherche, Blaise Pascal. We also thank the CNRS for financial support and for providing a Poste Rouge for Q.G. and a PICS to the two groups for cooperation. The authors are indebted to D. S. Kim for his support with pore size analysis. We thank the Korean Ministry of Science and Technology (Key Research Program, KK-0005-F0) for supporting this work, and the Korea Science and Engineering Foundation (KOSEF) Fellowship for J.S.C. is gratefully acknowledged. J.S.C. was partially supported by the U.S. Department of Energy under grant DE-FG03-96ER14672. P.M.F. was supported by the National Science Foundation under the MRSEC Program (NSF-DMR-96-32716).