Adsorption of Carbon Monoxide on Ni(110) Above Atmospheric Pressure Investigated with Surface X-Ray Diffraction

Abstract

The crystallographic structure of CO adsorbed on Ni(110) has been investigated with x-ray diffraction at ambient pressures of CO ranging from 2.3 to ${10}^{-10\mathrm{}}\mathrm{bars}$. At room temperature, the high pressure and vacuum structures are identical. Above room temperature $\left(\sim 130°\mathrm{C}\right)$, the high pressure of CO induces a restructuring of the Ni substrate that develops strained (111) microfacets.