Free-standing and substrate-supported 2D noble metals

In this research, the primary hypothesis centers on investigating the potential of 2D noble metals (Ag, Au, Ir, Os, Pd, Pt, Rh, Ru) as efficient catalysts for the hydrogen evolution reaction (HER). This study encompasses four distinct scenarios:
1. Free-Standing 2D Noble Metals: The intrinsic properties of standalone 2D noble metal layers are examined.
2. 2D Noble Metals on 4H-SiC: The influence of 4H-SiC as a substrate on the properties of these 2D noble metal layers is explored.
3. 2D Noble Metals on Buffer Layer/4H-SiC: A buffer layer is introduced between the 2D noble metals and 4H-SiC to investigate its impact on catalytic properties.
4. 2D Noble Metals on Epitaxial Graphene/4H-SiC: The use of epitaxial graphene as an additional layer between 2D noble metals and 4H-SiC is considered to study its effects.
To gain insights into the structure, electronic properties, and catalytic capabilities of these configurations, extensive Density Functional Theory (DFT) calculations were conducted employing the SIESTA package. The calculations utilized the vdW-BH functional in conjunction with a double-ζ polarized (DZP) basis set, ensuring accuracy in the results.
The research dataset presented encompasses a range of critical information:
1. XSF Structure Files: These files provide the atomic coordinates and structural details of the optimized configurations of 2D noble metals both before and after hydrogen adsorption, facilitating a deep understanding of their geometric transformations during catalysis.
2. Vesta-Generated TIFF Files (Side and Top Views): These images depict the optimized structures of 2D noble metals before and after hydrogen adsorption, offering visual insights into the morphological changes these materials undergo during the catalytic process.
3. Txt and MATLAB-Generated TIFF Files: These files contain essential data, including the xy-plane-averaged 1D charge density difference (CDD) for all considered structures. This data is invaluable for understanding the interfacial charge transfer. Additionally, the results of charge population analyses using Hirshfeld and Voronoi schemes are included, aiding in the characterization of charge distribution.
4. GaussView 6-Generated Cube and Vesta-Generated TIFF Files: These files contain the 3D charge density difference (CDD) information for all considered structures. This data enables researchers to delve into the spatial distribution of charge density changes.
The research dataset serves as a comprehensive resource for those interested in exploring the electronic and catalytic properties of 2D noble metals in various configurations. It not only offers detailed structural and electronic information but also provides the foundation for further investigations and the development of efficient catalysts. Researchers can use this dataset to replicate the findings, build upon the work, and contribute to advancements in catalysis science.