Autocatalytic Formation of High-Entropy Alloy Nanoparticles

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Autocatalytic Formation of High-Entropy Alloy Nanoparticles. / Broge, Nils L.N.; Bondesgaard, Martin; Søndergaard-Pedersen, Frederik; Roelsgaard, Martin; Iversen, Bo Brummerstedt.

In: Angewandte Chemie - International Edition, Vol. 59, No. 49, 12.2020, p. 21920-21924.

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

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Broge, Nils L.N. et al. "Autocatalytic Formation of High-Entropy Alloy Nanoparticles". Angewandte Chemie - International Edition. 2020, 59(49). 21920-21924. https://doi.org/10.1002/anie.202009002

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@article{6e72e28871f84dcebd30ca51fc30d623,
title = "Autocatalytic Formation of High-Entropy Alloy Nanoparticles",
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.",
keywords = "alloys, autocatalysis, nanocatalysts, nanoparticles, X-ray scattering, CATALYSIS, GROWTH, HYDROGEN STORAGE",
author = "Broge, {Nils L.N.} and Martin Bondesgaard and Frederik S{\o}ndergaard-Pedersen and Martin Roelsgaard and Iversen, {Bo Brummerstedt}",
note = "{\textcopyright} 2020 Wiley-VCH GmbH.",
year = "2020",
month = dec,
doi = "10.1002/anie.202009002",
language = "English",
volume = "59",
pages = "21920--21924",
journal = "Angewandte Chemie International Edition",
issn = "1433-7851",
publisher = "Wiley-VCH",
number = "49",

}

RIS

TY - JOUR

T1 - Autocatalytic Formation of High-Entropy Alloy Nanoparticles

AU - Broge, Nils L.N.

AU - Bondesgaard, Martin

AU - Søndergaard-Pedersen, Frederik

AU - Roelsgaard, Martin

AU - Iversen, Bo Brummerstedt

N1 - © 2020 Wiley-VCH GmbH.

PY - 2020/12

Y1 - 2020/12

N2 - 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.

AB - 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.

KW - alloys

KW - autocatalysis

KW - nanocatalysts

KW - nanoparticles

KW - X-ray scattering

KW - CATALYSIS

KW - GROWTH

KW - HYDROGEN STORAGE

UR - http://www.scopus.com/inward/record.url?scp=85091360644&partnerID=8YFLogxK

U2 - 10.1002/anie.202009002

DO - 10.1002/anie.202009002

M3 - Journal article

C2 - 32820603

AN - SCOPUS:85091360644

VL - 59

SP - 21920

EP - 21924

JO - Angewandte Chemie International Edition

JF - Angewandte Chemie International Edition

SN - 1433-7851

IS - 49

ER -