来自Ag(111)的重组解吸氧的超热速度分布。

Dorst Arved C, Dissanayake Rasika E A, Schauermann Daniel, Knies Sofie, Wodtke Alec M, Killelea Daniel R, Schäfer Tim

Institute of Physical Chemistry, University of Göttingen, Göttingen, Germany.

Max-Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.

Front Chem. 2023 Aug 2;11:1248456. doi: 10.3389/fchem.2023.1248456. eCollection 2023.

This study presents velocity-resolved desorption experiments of recombinatively-desorbing oxygen from Ag (111). We combine molecular beam techniques, ion imaging, and temperature-programmed desorption to obtain translational energy distributions of desorbing O. Molecular beams of NO are used to prepare a (4 × 4)-O adlayer on the silver crystal. The translational energy distributions of O are shifted towards hyperthermal energies indicating desorption from an intermediate activated molecular chemisorption state.

本研究展示了从Ag(111)表面通过重组解吸方式解吸氧的速度分辨解吸实验。我们结合了分子束技术、离子成像技术和程序升温脱附技术，以获得解吸氧的平动能量分布。使用NO分子束在银晶体上制备了一个(4×4)-O吸附层。氧的平动能量分布向超热能量方向移动，这表明氧是从一个中间活化分子化学吸附态解吸出来的。