Ensemble and ligand effects on the acetylene adsorption on ordered PdxAg1−x/Pd(100) surface alloys investigated by periodic DFT study

Literature Information

Publication Date 2013-10-04
DOI 10.1039/C3CP52504J
Impact Factor 3.676
Authors

Qiang Li, Lihong Pan, Xinling Zhuang, Mingli Ling, Linhai Duan


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Abstract

The interactions of acetylene with structurally ordered PdxAg1−x/Pd(100) (x = 1, 0.75, 0.5, 0.25) surface alloys, in which Ag is presented only in the first layer as the computational model system, were investigated by gradient corrected periodic density functional calculations to unravel and understand contributions from electronic strain, electronic ligand and geometric ensemble effects. The calculated adsorption energies indicate that the hollow sites are always found to be more stable than any others and more sensitive to the Ag atoms because of the strong ensemble effect. However, the ligand effect plays a significant role in both the top and bridge adsorption sites. The electrons transferred to the acetylene molecules from the surface increase with increasing concentration of the surface atomic Ag.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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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.

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