We present the results of high-resolution electron energy loss experiments on (CO/O)/Ni(100) and (CO/H)/Ni(100) systems. Oxygen and hydrogen interact differently with Ni(100) surface, nevertheless, both species do not affect to a great extent the vibrational properties of CO. A phase of CO molecules weakly bonded to the surface and unaffected by coadsorbed oxygen and hydrogen, is found. Coverage of 0.5 ML of predosed oxygen chemically passivates the Ni(100) surface and inhibits any CO adsorption at room temperature. CO sites are unambiguously determined for each predosed Ni(100) surface. (c) 2006 Elsevier B.V. All rights reserved.
We present the results of high-resolution electron energy loss experiments on (CO/O)/Ni(100) and (CO/H)/Ni(100) systems. Oxygen and hydrogen interact differently with Ni(100) surface, nevertheless, both species do not affect to a great extent the vibrational properties of CO. A phase of CO molecules weakly bonded to the surface and unaffected by coadsorbed oxygen and hydrogen, is found. Coverage of 0.5 ML of predosed oxygen chemically passivates the Ni(100) surface and inhibits any CO adsorption at room temperature. CO sites are unambiguously determined for each predosed Ni(100) surface. (c) 2006 Elsevier B.V. All rights reserved.
Effects of predosed oxygen and hydrogen on CO adsorption on Ni(100)
CHIARELLO, Gennaro;FORMOSO, Vincenzo;AGOSTINO, Raffaele Giuseppe;
2007-01-01
Abstract
We present the results of high-resolution electron energy loss experiments on (CO/O)/Ni(100) and (CO/H)/Ni(100) systems. Oxygen and hydrogen interact differently with Ni(100) surface, nevertheless, both species do not affect to a great extent the vibrational properties of CO. A phase of CO molecules weakly bonded to the surface and unaffected by coadsorbed oxygen and hydrogen, is found. Coverage of 0.5 ML of predosed oxygen chemically passivates the Ni(100) surface and inhibits any CO adsorption at room temperature. CO sites are unambiguously determined for each predosed Ni(100) surface. (c) 2006 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
