Structure and Bonding of Water on Pt(111)
Hirohito OgasawaraFYSIKUM, Stockholm University, Albanova University Center, S-10691 Stockholm, SwedenBarbara BrenaFYSIKUM, Stockholm University, Albanova University Center, S-10691 Stockholm, SwedenDennis NordlundDepartment of Physics, Uppsala University, Box 530, S-75121 Uppsala, SwedenM. NybergFYSIKUM, Stockholm University, Albanova University Center, S-10691 Stockholm, SwedenAlexander PelmenschikovFYSIKUM, Stockholm University, Albanova University Center, S-10691 Stockholm, SwedenLars G. M. PetterssonFYSIKUM, Stockholm University, AlbaNova University Center, S-10691 Stockholm, SwedenAnders NilssonStanford Synchrotron Radiation Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025
2002en
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We address the adsorption of water on Pt(111) using x-ray absorption, x-ray emission, and x-ray photoelectron spectroscopy along with calculations in the framework of density functional theory. Using the direct relationship between the electronic structure and adsorbate geometry, we show that in the first layer all the molecules bind directly to the surface and to each other through the in-layer H bonds without dissociation, creating a nearly flat overlayer. The water molecules are adsorbed through alternating metal-oxygen (M-O) and metal-hydrogen (M-HO) bonds.
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