Surface X-ray scattering of high index plane of platinum containing kink atoms in solid-liquid interface: Pt(310) = 3(100)-(110)

摘要

Surface structure of Pt(310) = 3(100)-(110), which contains kink atoms in the step, has been determined with the use of in situ surface X-ray scattering (SXS) in the double layer region (0.50 V(RHE)) in 0.1 M HClO{sub}4. Clean Pt(310) surface has pseudo (1 × 1) structure on which lateral displacements of 2-9% and 0.3-1% are found along a and b directions, respectively, whereas the surfaces of Pt(110) = 2(111)-(111) and Pt(311) = 2(100)-(111) are reconstructed to (1 × 2) according to previous reports. Interlayer spacing between the first and the second layers d{sub}12 is contracted about 5% compared with the bulk spacing, whereas those between underlying layers are expanded down to fourth layer. Fully adsorbed CO has no effect on the surface structure of Pt(310). This result differs from that on Pt(111), where d{sub}12 is expanded after CO adsorption.