Steric effects in the adsorption of O2 on a Cu(111) surface

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-02-12 DOI:10.1039/d4cp04595e

Lok Yiu Wu, Maksymilian Jakub Roman, Brianna R Heazlewood, Mitsunori Kurahashi

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Abstract

Probing the stereodynamics of a gas-surface interaction is a useful tool to investigate the mechanisms responsible for adsorption. Experimental results are provided on the adsorption of alignment-controlled O₂ interacting with a Cu(111) surface for the first time, across a range of incident energies (65–550 meV) and angles of incidence (0–60°). Molecules of O₂ in a supersonic beam are prepared in a single spin-rotational state, and aligned with a Cu(111) surface so that the rotational angular momentum of O₂ is either parallel or perpendicular to the surface. A strong steric effect is observed, where the initial sticking probability is higher in case of a "side-on" (or "broadside") collision, with measurable adsorption appearing at normal incident energies of 100 meV. The onset of sticking occurs at incident energies of approximately 200 meV in case of an "end-on" collision. The results also indicate that the adsorption of O₂ on Cu(111) is predominantly due to an activated process in the energy range probed, corroborating previous experimental and theoretical results

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.