Hydrogen on and in Selected Overlayer Near-Surface Alloys and the Effect of Subsurface Hydrogen on the Reactivity of Alloy Surfaces
- 268 Downloads
The interaction of hydrogen with the close-packed facets of seventeen transition metals overlaid with 1 ML of five transition metals (Au, Ag, Cu, Pt, and Pd) has been studied using periodic self-consistent (GGA-PW91) density functional theory (DFT) calculations. For noble metal overlayers (Au, Ag, and Cu), hydrogen at the host-metal/overlayer interface (subsurface hydrogen) is more stable than subsurface hydrogen in the pure host. For certain Au and Ag overlayers, subsurface hydrogen is more stable than surface hydrogen in the same system. The presence of subsurface hydrogen was found to have a significant effect on the electronic structure of the overlayer, resulting in its modified surface reactivity.
KeywordsDFT Hydrogen Alloys
All three authors have greatly benefited from interactions with Prof. Jens K. Nørskov over the past several years and wish to congratulate him on his 2009 ACS Gabor A. Somorjai award for Creative Research in Catalysis. Financial support by the DOE-BES, Chemical Sciences Division, is greatly appreciated. Research was performed in part using supercomputing resources at the following institutions: (1) EMSL, a national scientific user facility located at Pacific Northwest National Laboratory; (2) the National Center for Computational Sciences (NCCS) at Oak Ridge National Laboratory; (3) the Center for Nanoscale Materials (CNM) at Argonne National Laboratory; and (4) the National Energy Research Scientific Computing Center (NERSC). EMSL is sponsored by the US Department of Energy’s Office of Biological and Environmental Research. NCCS, CNM, and NERSC are supported by the Office of Science of the US Department of Energy under Contract No. DE-AC05-00OR22725, DE-AC02-06CH11357, and DE-AC02-05CH11231, respectively.
- 1.Satterfield CN (1996) Heterogeneous catalysis in industrial practice, 2nd edn. Krieger Publishing Company, Malabar, FLGoogle Scholar
- 3.Somorjai GA (1994) Introduction to surface chemistry and catalysis. Wiley, New YorkGoogle Scholar
- 6.Forsberg CW (2005) Chem Eng Prog 101:20Google Scholar
- 28.Okada M, Moritani K, Kasai T, Dino WA, Kasai H, Ogura S, Wilde M, Fukutani K (2005) Phys Rev B 71Google Scholar
- 35.Bhatia B, Sholl DS (2005) J Chem Phys 122Google Scholar
- 45.Jonsson H, Mills G, Jacobsen KW (1998) In: Beme BJ, Ciccotti G, Coker DF (eds) Classical and quantum dynamics in condensed phase simulations. World Scientific, SingaporeGoogle Scholar
- 47.Hammer B, Nørskov JK (1997) NATO ASI Series, Series E: Applied Sciences: 331 (Chemisorption and Reactivity on Supported Clusters and Thin Films) 285Google Scholar
- 49.Kitchin JR, Nørskov JK, Barteau MA, Chen JG (2004) Phys Rev Lett 93Google Scholar
- 54.Ferrin P, Kandoi S, Nilekar A, Mavrikakis M (in preparation)Google Scholar