Lucas Christopher A, Cormack Michael, Gallagher Mark E, Brownrigg Alexander, Thompson Paul, Fowler Ben, Gründer Yvonne, Roy Jerome, Stamenković Vojislav, Marković Nenad M
Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, UK L69 7ZE.
Faraday Discuss. 2008;140:41-58; discussion 93-112. doi: 10.1039/b803523g.
In-situ surface X-ray scattering (SXS) has become a powerful probe of the atomic structure at the metal-electrolyte interface. In this paper we describe an experiment in which a Pt(111) sample is prepared under ultra-high vacuum (UHV) conditions to have a p(2 x 2) oxygen layer adsorbed on the surface. The surface is then studied using SXS under UHV conditions before successive transfer to a bulk water environment and then to the electrochemical environment (0.1 M KOH solution) under an applied electrode potential. The Pt surface structure is examined in detail using crystal truncation rod (CTR) measurements under these different conditions. Finally, some suggestions for future experiments on alloy materials, using the same methodology, are proposed and discussed in relation to previous results.
原位表面X射线散射（SXS）已成为研究金属-电解质界面原子结构的有力手段。在本文中，我们描述了一个实验，即在超高真空（UHV）条件下制备一个Pt(111)样品，使其表面吸附有p(2×2)氧层。然后在超高真空条件下使用SXS对该表面进行研究，之后依次将其转移至本体水环境，再在施加电极电势的情况下转移至电化学环境（0.1 M KOH溶液）。在这些不同条件下，使用晶体截断棒（CTR）测量对Pt表面结构进行了详细研究。最后，针对未来使用相同方法对合金材料进行实验提出了一些建议，并结合先前的结果进行了讨论。
