Autocatalytic Formation of High-Entropy Alloy Nanoparticles

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

High-entropy alloy (HEA) nanoparticles hold great promise as tunable catalysts. Despite the fact that alloy formation is typically difficult in oxygen-rich environments, we found that Pt-Ir-Pd-Rh-Ru nanoparticles can be synthesized under benign low-temperature solvothermal conditions. In situ X-ray scattering and transmission electron microscopy reveal the solvothermal formation mechanism of Pt-Ir-Pd-Rh-Ru nanoparticles. For the individual metal acetylacetonate precursors, formation of single metal nanoparticles takes place at temperatures spanning from ca. 150 °C for Pd to ca. 350 °C for Ir. However, for the mixture, homogenous Pt-Ir-Pd-Rh-Ru HEA nanoparticles can be obtained around 200 °C due to autocatalyzed metal reduction at the (111) facets of the forming crystallites. The autocatalytic formation mechanism suggests that many types of HEA nanocatalysts should accessible with scalable solvothermal reactions, thereby providing broad availability and tunability.

Original languageEnglish
JournalAngewandte Chemie - International Edition
Volume59
Issue49
Pages (from-to)21920-21924
Number of pages5
ISSN1433-7851
DOIs
Publication statusPublished - Dec 2020

    Research areas

  • alloys, autocatalysis, nanocatalysts, nanoparticles, X-ray scattering, CATALYSIS, GROWTH, HYDROGEN STORAGE

See relations at Aarhus University Citationformats

ID: 201770057