Work

In Situ Gas-Phase 4D-STEM for Strain Mapping during Hydride Formation in Palladium Nanocubes

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The uptake and release of hydrogen are key parameters for hydrogen storage materials. Lattice strain offers a powerful way to tune hydride formation in metal nanoparticles. However, the role of strain on hydride formation is difficult to assess on a single nanoparticle level due to the lack of in situ characterization tools to quantify strain in the presence of a gas. Here, we achieve a dynamic, in situ study on the reversible hydride formation in individual palladium nanocubes by applying 4D scanning transmission electron microscopy (4D-STEM) in the presence of 1 bar H 2 and quantitatively assess the lattice strain with subnanometer resolution. Upon hydride formation at 125 °C, the Pd lattice expands by ∼3.1% and relaxes back upon hydrogen desorption at 200 °C. Our in situ 4D-STEM approach is relevant to a wide range of nanoparticle systems and applications, including catalyst- and gas-sensing materials.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.5c00702

Authors: Marta Perxés Perich, Jan-Willem Lankman, Claudia J. Keijzer, Jessi E. S. van der Hoeven

Institution: Utrecht University

Language: English

Topic: Hydrogen Storage and Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: Universiteit Utrecht, Nederlandse Organisatie voor Wetenschappelijk Onderzoek