1 23 Catalysis Letters ISSN 1011-372X Volume 142 Number 10 Catal Lett (2012) 142:1180-1189 DOI 10.1007/s10562-012-0882-5 Hydroisomerization of n-Hexadecane Over Anion Modified Pt/HfO 2 Catalysts Muthu Kumaran Gnanamani, Linda Z. Linganiso, Gary Jacobs, Robert A. Keogh, Wilson D. Shafer & Burtron H. Davis