title: Effect of electronic structures on catalytic properties of CuNi alloy and Pd in MeOH-related reactions.
abstract: We investigated the catalytic properties of a CuNi solid solution and Pd for methanol-related reactions and associated valence electronic structures. Calculations and X-ray photoelectron spectroscopy measurements revealed that the CuNi alloy has a similar valence electronic structure to Pd and hence they exhibited similar CO selectivities in steam reforming of methanol and decomposition of methanol. Samples prepared by various processes were found to have similar CO selectivities. We conjecture that alloying of Cu and Ni dramatically alters the valence electronic structures, making it similar to that of Pd so that the alloy exhibits similar catalytic properties to Pd. First-principles slab calculations of surface electronic structures support this conjecture.
authors: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors: An-Pang
authors: AP
authors: Tsai
authors: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors: Tomofumi
authors: T
authors: Kimura
authors: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors: Yukinori
authors: Y
authors: Suzuki
authors: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors: Satoshi
authors: S
authors: Kameoka
authors: National Institute for Materials Science, Tsukuba 305-0047, Japan.
authors: Masahiko
authors: M
authors: Shimoda
authors: Department of Physics, Chuo University, Kasuga, Tokyo 112-8551, Japan.
authors: Yasushi
authors: Y
authors: Ishii