A general flame aerosol route to high-entropy nanoceramics

Liu, Shuo; Pao, Chih-Wen; Chen, Jeng-Lung; Li, Sichi; Chen, Kaiwen; Xuan, Zhengxi; Song, Chengyu; Urban, Jeffrey J.; Swihart, Mark T.; Dun, Chaochao

doi:10.1016/j.matt.2024.07.019

A general flame aerosol route to high-entropy nanoceramics

Journal Article · Tue Aug 27 00:00:00 EDT 2024 · Matter (Online)

DOI:https://doi.org/10.1016/j.matt.2024.07.019· OSTI ID:2480414

Liu, Shuo ^[1]; Pao, Chih-Wen ^[2]; Chen, Jeng-Lung ^[2]; Li, Sichi ^[3]; Chen, Kaiwen ^[1]; Xuan, Zhengxi ^[1]; Song, Chengyu ^[4]; Urban, Jeffrey J. ^[4]; Swihart, Mark T. ^[1]; ^[4]

State Univ. of New York (SUNY), Buffalo, NY (United States)
National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

High-entropy ceramics are an emerging class of materials with fascinating characteristics. However, elemental immiscibility and crystal complexity limit the development of a general synthesis strategy, and common methods yield bulk materials. Here, we introduce a transformative non-equilibrium flame aerosol technique for synthesizing high-entropy nanoceramics. This scalable, one-step process enables the production of high-entropy oxide nanoceramics with an unprecedented diversity of crystal structures, including fluorite-phase materials that integrate up to 22 distinct cation elements. The method’s capacity for entropic stabilization and grain refinement significantly improves the thermal stability of these nanostructures. In a representative application, a Pt-(MgCoNiCuZn)O high-entropy single-atom catalyst showed superior activity and long-term stability, maintaining constant CO₂ conversion over 670 h and dramatically outperforming conventional catalysts. Finally, the general approach opens a vast composition and structure space for the creation of high-entropy oxide nanomaterials for application across diverse fields, including catalysis, energy storage, sensing, and thermal management.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231; AC52-07NA27344; EE0008675; FE0032209

OSTI ID:: 2480414

Alternate ID(s):: OSTI ID: 2476428

Report Number(s):: LLNL--JRNL-2001444

Journal Information:: Matter (Online), Journal Name: Matter (Online) Journal Issue: 11 Vol. 7; ISSN 2590-2385

Publisher:: Cell Press/ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
CO2 hydrogenation
catalysis
flame aerosol process
high-entropy nanoceramics
multi-element mixing
non-equilibrium synthesis
single-atom dispersion
structure diversity
thermal stability

A general flame aerosol route to high-entropy nanoceramics

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