Spectroscopic studies of surface and subsurface hydrogen/metal systems

Lynch, D. L.; Rick, Steven W.; Gomez, M. A.; Spath, B. W.; Doll, J. D.; Pratt, L. R.
October 1992
Journal of Chemical Physics;10/1/1992, Vol. 97 Issue 7, p5177
Academic Journal
Recent experiments on the H/Ni(111) system have demonstrated that high-resolution electron-energy-loss spectra of subsurface absorbate species can be observed. We report here molecular-dynamics simulations for both the H/Ni(111) and H/Pd(111) systems. The necessary atomic forces are obtained from embedded atom method (EAM) potentials. From such calculations we have obtained the power spectra and compare our results to the available experimental data. These calculations reasonably reproduce the observed shifts upon embedding the H subsurface and we comment on the possibility of subsurface absorbates interfering with surface adsorbate assignments. Lastly, we illustrate the sensitivity of our results to the parametrization of the EAM potential.


Related Articles

  • Molecule-substrate interaction channels of metal-phthalocyanines on graphene on Ni(111) surface. Dou, Weidong; Huang, Shuping; Zhang, R. Q.; Lee, C. S. // Journal of Chemical Physics;3/7/2011, Vol. 134 Issue 9, p094705 

    Molecule-substrate interaction channels of metal-phthalocyanines (MPcs, including NiPc, CuPc, ZnPc, FePc, and CoPc) on graphene on Ni(111) were investigated by employing high-resolution electron energy loss spectroscopy (HREELS). Except the expected IR-active modes, some Raman-active modes were...

  • Collective Electronic Excitations in Thin Ag Films on Ni(111) Politano, Antonio; Formoso, Vincenzo; Chiarello, Gennaro // Plasmonics;Dec2013, Vol. 8 Issue 4, p1683 

    The collective electronic excitations in thin Ag films deposited onto the Ni(111) surface were studied by high-resolution electron energy loss spectroscopy. A broad loss peak at 7.7 eV was assigned to the Ag multipole plasmon, in excellent agreement with calculations based on s- d...

  • Reduction of nickel oxide particles by hydrogen studied in an environmental TEM. Jeangros, Q.; Hansen, T.; Wagner, J.; Damsgaard, C.; Dunin-Borkowski, R.; Hébert, C.; Van herle, J.; Hessler-Wyser, A. // Journal of Materials Science;Apr2013, Vol. 48 Issue 7, p2893 

    In situ reduction of nickel oxide (NiO) particles is performed under 1.3 mbar of hydrogen gas (H2) in an environmental transmission electron microscope (ETEM). Images, diffraction patterns and electron energy-loss spectra (EELS) are acquired to monitor the structural and chemical evolution of...

  • Effect of atomic hydrogen and oxygen on diamond growth. Sun, Biwu; Zhang, Xiaopin; Zhang, Qinzhe; Lin, Zhangda // Journal of Applied Physics;5/1/1993, Vol. 73 Issue 9, p4614 

    Presents a study that used high-resolution electron energy loss spectroscopy to investigate the effect of atomic hydrogen and oxygen on diamond growth. Experimental details; Results of the study; Conclusion.

  • On the chemical mechanism of surface enhanced Raman scattering: Experiment and theory. Kambhampati, Patanjali; Child, C.M. // Journal of Chemical Physics;3/22/1998, Vol. 108 Issue 12, p5013 

    Examines the mechanism of surface enhanced Raman scattering on an atomically smooth metal surface. Application of the electron energy loss spectroscopy (EELS) and molecular spectroscopy simulations; Effect of crystal face and chemisorption on EELS; Impact of metal surface on the transition...

  • Kinetics of unimolecular decomposition on surfaces: Methanol on Ni(110). Richter, Lee J.; Ho, W. // Journal of Chemical Physics;9/1/1985, Vol. 83 Issue 5, p2569 

    The decomposition of methanol on a clean Ni(110) surface has been studied with temperature programmed reaction spectroscopy, low energy electron diffraction and temperature programmed electron energy loss spectroscopy: a new technique for the characterization of surface dynamic properties....

  • Electron stimulated oxidation of the Ni(111) surface: Dependence on substrate temperature and incident electron energy. Stirniman, M. J.; Li, Wei; Sibener, S. J. // Journal of Chemical Physics;7/1/1995, Vol. 103 Issue 1, p451 

    The effect of surface temperature on the rate of oxidation of the Ni(111) surface with and without electron irradiation has been determined for temperatures between 120 and 340 K. The oxidation rate in the presence of an electron beam demonstrates an inverse dependence on the substrate...

  • Vibrational measurements of Na/Ni(111) and (Na + CO)/Ni(111). Politano, A.; Agostino, R. G.; Colavita, E.; Formoso, V.; Tenuta, L.; Chiarello, G. // Journal of Materials Science;May2008, Vol. 43 Issue 10, p3447 

    The vibrational properties of Na atoms and of Na coadsorbed with CO on Ni(111) have been studied by high-resolution electron energy loss spectroscopy. Loss measurements showed a significant weakening of the alkali–substrate bond as a function of the alkali coverage. Moreover, we found...

  • Mechanism of the reaction NO + H2 on the Pt(100)-hex surface under conditions of the spatially nonuniform distribution of reacting species. M. Yu. Smirnov; D. Yu. Zemlyanov; E. I. Vovk // Kinetics & Catalysis;Nov2007, Vol. 48 Issue 6, p853 

    The interaction of hydrogen with NOads/1 � 1 islands produced by NO adsorption on the reconstructed surface Pt(100)-hex was studied by high-resolution electron energy loss spectroscopy (HREELS) and the temperature-programmed reaction (TPR) method. The islands are areas of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics