Revealing 3-dimensional core-shell interface structures at the single-atom level
arXiv:2207.06677 · doi:10.1038/s41467-022-33236-6
Abstract
Nanomaterials with core-shell architectures are prominent examples of strain-engineered materials, where material properties can be designed by fine-tuning the misfit strain at the interface. Here, we elucidate the full 3D atomic structure of Pd@Pt core-shell nanoparticles at the single-atom level via atomic electron tomography. Full 3D displacement fields and strain profiles of core-shell nanoparticles were obtained, which revealed a direct correlation between the surface and interface strain. It also showed clear Poisson effects at the scale of the full nanoparticle as well as the local atomic bonds. The strain distributions show a strong shape-dependent anisotropy, whose nature was further corroborated by molecular statics simulations. From the observed surface strains, the surface oxygen reduction reaction activities were predicted. These findings give a deep understanding of structure-property relationships in strain-engineerable core-shell systems, which could pave a new way toward direct control over the resulting catalytic properties.
arXiv commentMain manuscript: 30 pages, 4 figures, 73 references || Supplementary info: 26 pages, 26 figures, 1 table, 15 references
References in corpus (7)
- Deciphering chemical order/disorder and material properties at the single-atom level
- Three-dimensional coordinates of individual atoms in materials revealed by electron tomography
- High Entropy Alloy Nanoparticles Decorated, p-type 2D-Molybdenum Disulphide (MoS2) and Gold Schottky Junction Enhanced Hydrogen Sensing
- Lattice strain measurement of core@shell electrocatalysts with 4D-STEM nanobeam electron diffraction
- Effects of strain on the electronic structure, superconductivity, and nematicity in FeSe studied by angle-resolved photoemission spectroscopy
- Elasticity of nanometer-sized objects
- Direct observation of three-dimensional atomic structure of twinned metallic nanoparticles and their catalytic properties
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- Atomic-scale 3D structural dynamics and functional degradation of Pt alloy nanocatalysts during the oxygen reduction reaction
- Advanced Techniques in Automated High Resolution Scanning Transmission Electron Microscopy
- Advancing atomic electron tomography with neural networks
- Spatial correlations of charge density wave order across the transition in 2H-NbSe2