通过程序升温脱附（TPD）和高分辨电子能量损失谱（HREELS）研究水与Ni(111)以及H/Ni(111)的相互作用。

The interaction of water with Ni(111) and H/Ni(111) studied by TPD and HREELS.

作者信息

Shan Junjun, Aarts Jacques F M, Kleyn Aart W, Juurlink Ludo B F

机构信息

Leiden Institute of Chemistry, Gorlaeus Laboratories, PO Box 9502, 2300 RA, Leiden, the Netherlands.

出版信息

Phys Chem Chem Phys. 2008 Apr 28;10(16):2227-32. doi: 10.1039/b718266j. Epub 2008 Feb 29.

DOI:10.1039/b718266j

PMID:18404230

Abstract

We have used temperature-programmed desorption in combination with specular and off-specular high resolution electron energy loss spectroscopy to study the interaction of H(2)O and D(2)O with the bare and hydrogen-covered Ni(111) surface. Our results for the bare metal surface agree with previous reports and we are able to relate two prominent features in vibrational spectra to nuclear motions at the surface. Pre-covering Ni(111) with hydrogen alters both adsorption and desorption of water significantly. The strong H-Ni bond does not allow for isotopic exchange with co-adsorbed D(2)O. Strong resemblance of desorption traces and vibrational spectra of submonolayer coverages on H-covered Ni(111) and multilayers on bare Ni(111) suggests that adsorption of hydrogen makes this nickel surface hydrophobic.

摘要

我们采用程序升温脱附结合镜面反射和非镜面反射高分辨率电子能量损失谱，来研究H₂O和D₂O与裸露的以及氢覆盖的Ni(111)表面之间的相互作用。我们对裸露金属表面的研究结果与先前的报道一致，并且能够将振动光谱中的两个显著特征与表面的核运动联系起来。预先用氢覆盖Ni(111)会显著改变水的吸附和解吸。强H-Ni键不允许与共吸附的D₂O进行同位素交换。在氢覆盖的Ni(111)上亚单层覆盖度的脱附轨迹和振动光谱与在裸露的Ni(111)上多层覆盖度的脱附轨迹和振动光谱有很强的相似性，这表明氢的吸附使该镍表面具有疏水性。