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Title: Entropy‐Maximized Synthesis of Multimetallic Nanoparticle Catalysts via a Ultrasonication‐Assisted Wet Chemistry Method under Ambient Conditions

Journal Article · · Advanced Materials Interfaces
 [1];  [2];  [2];  [3];  [4]; ORCiD logo [5]
  1. School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China, Department of Chemistry The University of Tennessee, Knoxville Knoxville TN 37996 USA
  2. Department of Chemistry The University of Tennessee, Knoxville Knoxville TN 37996 USA
  3. Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
  4. School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
  5. Department of Chemistry The University of Tennessee, Knoxville Knoxville TN 37996 USA, Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA

Abstract A facile ultrasonication‐assisted wet chemistry method for preparing multicomponent alloy nanoparticles (NPs) including high‐entropy alloys (HEAs) is reported. PtAuPdRhRu alloy (HEA), quaternary PtAuPdRh alloy, and ternary PtAuPd alloy NPs are produced with ≈3 nm in diameter. Taking advantage of the acoustic cavitation phenomenon in ultrasonication process, noble metal precursors could be co‐reduced by chemical reductants and transform to alloy structures under operation at room conditions. The instantaneous massive energy (≈5000 °C, 2000 atm) occurring in momentary timespans (≤10 −9 s) contributes to the formation of multimetallic mixed nanomaterials driven by entropy maximization. Owing to strong synergistic effects, the catalysts with the HEA NPs supported on carbons exhibit prominent electrocatalytic activities for hydrogen evolution reaction.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012704
OSTI ID:
1496655
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 7 Vol. 6; ISSN 2196-7350
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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