Surface X-ray scattering of high index plane of platinum containing kink atoms in solid–liquid interface: Pt(3 1 0) = 3(1 0 0)–(1 1 0)

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• 作者：Nagahiro Hoshi ; Akira Nakahara ; Masashi Nakamura ; Kazushi Sumitani ; Osami Sakata
• 关键词：Surface X-ray scattering ; Solid&#x2013 ; liquid interface ; n(1 0 0)&#x2013 ; (1 1 0) Series of Pt ; Kink atoms ; Adsorbed CO
• 刊名：Electrochimica Acta
• 出版年：2008
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 September 2008
• 卷：53
• 期：21
• 页码：6070-6075
• 文件大小：490 K

摘要

Surface structure of Pt(3 1 0) = 3(1 0 0)–(1 1 0), 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 HClO₄. Clean Pt(3 1 0) 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(1 1 0) = 2(1 1 1)–(1 1 1) and Pt(3 1 1) = 2(1 0 0)–(1 1 1) are reconstructed to (1 × 2) according to previous reports. Interlayer spacing between the first and the second layers d₁₂ 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(3 1 0). This result differs from that on Pt(1 1 1), where d₁₂ is expanded after CO adsorption.