Journal Article

PUBDB-2020-04611

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Autocatalytic Formation of High‐Entropy Alloy Nanoparticles

Broge, N. L. N.Extern* ; Bondesgaard, M. ; Søndergaard-Pedersen, F. ; Roelsgaard, M.Extern* ; Iversen, B. B. (Corresponding author)

2020
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/anie.202009002  doi:10.3204/PUBDB-2020-04611

Abstract: 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)
2. PETRA Beamline P21.1 (PETRA III)

Appears in the scientific report 2020

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Database coverage:
; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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