Single-Step, Highly Active, and Highly Selective Nanoparticle Catalysts for the Hydrogenation of Key Organic Compounds We gratefully acknowledge the support (by a rolling grant to J.M.T. and an award to B.F.G.J.) of EPSRC (UK), of the Cambridge Overseas Trust (Schlumberger research), and ICI (for T.K.), and the award of a research fellowship (for S.H.) from Newnham College, Cambridge.