Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany.
Phys Chem Chem Phys. 2010 Sep 7;12(33):9801-10. doi: 10.1039/c003368e. Epub 2010 Jun 12.
The coadsorption of CO and hydrogen on a structurally well-defined Pt(35)Ru(65)/Ru(0001) monolayer surface alloy and, for comparison, on Ru(0001) were investigated by temperature programmed desorption (TPD) and infrared reflection absorption spectroscopy (IRAS). The data reveal distinct modifications in the hydrogen adsorption behavior and also in the CO adsorption properties compared to adsorption of the individual components both on the mono-metallic and on the bimetallic surface. These modifications are discussed on an atomic scale, in a picture that involves adsorbate-adsorbate interactions and site-specific variations in the (local) adsorption properties of the bimetallic surface, due to electronic ligand and strain effects and geometric ensemble effects.
通过程序升温脱附（TPD）和红外反射吸收光谱（IRAS）研究了 CO 和氢气在结构上明确的 Pt(35)Ru(65)/Ru(0001)单层表面合金上的共吸附，以及为了进行比较，在 Ru(0001)上的共吸附。数据表明，与在单金属和双金属表面上吸附单个组分相比，氢的吸附行为以及 CO 的吸附性质都有明显的变化。这些变化在原子尺度上进行了讨论，在这个图像中，涉及到吸附物-吸附物相互作用以及由于电子配体和应变效应以及几何集合效应，双金属表面（局部）吸附性质的特定位置变化。
