Journal
ADVANCED MATERIALS INTERFACES
Volume 6, Issue 7, Pages -Publisher
WILEY
DOI: 10.1002/admi.201900015
Keywords
alkaline HER; high-entropy alloy; nanoparticles; ultrasonication-assisted; wet chemistry method
Funding
- U.S. Department of Energy, Basic Energy Science, Chemical, Geoscience, and Bioscience Division
- DOE, Office of Basic Energy Science [DE-SC0012704]
- National Natural Science Foundation of China [21776090]
- China Scholarship Council
- Oak Ridge National Laboratory
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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 approximate to 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 (approximate to 5000 degrees 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.
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