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Joule-heating empowers solid-state diffusion toward Au-based nanoalloys with optimal ensemble effect for efficient electrocatalysis.

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Τίτλος: Joule-heating empowers solid-state diffusion toward Au-based nanoalloys with optimal ensemble effect for efficient electrocatalysis.
Συγγραφείς: Zheng, Zhong1,2 (AUTHOR), Ma, Mengyuan1,3 (AUTHOR), Chen, Dong1 (AUTHOR), Qi, Xiwei2 (AUTHOR), Tian, Shaonan1 (AUTHOR) sntian@ipe.ac.cn, Liu, Hui1 (AUTHOR) sntian@ipe.ac.cn, Yang, Jun1,3 (AUTHOR) sntian@ipe.ac.cn
Πηγή: Applied Physics Reviews. Mar2026, Vol. 13 Issue 1, p1-13. 13p.
Θεματικοί όροι: *Self-diffusion (Solid state physics), *Electrocatalysis, *Catalysts, *Alcohol oxidation, *Oxygen reduction, *Gold nanoparticles, *Nanoparticle synthesis, *Resistance heating
Περίληψη: Conventional wet-chemistry synthesis of Au-based nanoalloys often suffers from core–shell/segregated structures or incomplete alloying due to mismatched metal redox kinetics, limiting their structural uniformity and electrocatalytic performance. To address this challenge, we herein develop a robust, versatile strategy for fabricating carbon-supported Au-based nanoalloys by coupling rapid Joule-heating with the basic solid-state diffusion theory. This method offers distinct advantages: Joule-heating enables ultrafast, controllable high-temperature generation, which efficiently drives rapid solid-state diffusion of metal atoms; meanwhile, pre-synthesized ∼1.5 nm Au clusters (as seeds) ensure homogeneous elemental mixing by shortening diffusion distances and promoting substitutional diffusion. It successfully produces well-dispersed, crystalline AuPd nanoalloys with uniform Au/Pd distribution. Moreover, the strategy is universal, extending to binary AuM/C (M = Fe, Ni, Cu, Rh, Pt) and multi-component nanoalloys (e.g., ternary AuCuPd/C, quaternary AuCuPtPd/C). Electrocatalytic tests show that Au1Pd1/C outperforms commercial Pd/C in the alkaline oxygen reduction reaction and ethanol oxidation reaction, confirming the strategy's value for developing high-performance electrocatalysts. [ABSTRACT FROM AUTHOR]
Βάση Δεδομένων: Academic Search Index
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  Data: Joule-heating empowers solid-state diffusion toward Au-based nanoalloys with optimal ensemble effect for efficient electrocatalysis.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Conventional wet-chemistry synthesis of Au-based nanoalloys often suffers from core–shell/segregated structures or incomplete alloying due to mismatched metal redox kinetics, limiting their structural uniformity and electrocatalytic performance. To address this challenge, we herein develop a robust, versatile strategy for fabricating carbon-supported Au-based nanoalloys by coupling rapid Joule-heating with the basic solid-state diffusion theory. This method offers distinct advantages: Joule-heating enables ultrafast, controllable high-temperature generation, which efficiently drives rapid solid-state diffusion of metal atoms; meanwhile, pre-synthesized ∼1.5 nm Au clusters (as seeds) ensure homogeneous elemental mixing by shortening diffusion distances and promoting substitutional diffusion. It successfully produces well-dispersed, crystalline AuPd nanoalloys with uniform Au/Pd distribution. Moreover, the strategy is universal, extending to binary AuM/C (M = Fe, Ni, Cu, Rh, Pt) and multi-component nanoalloys (e.g., ternary AuCuPd/C, quaternary AuCuPtPd/C). Electrocatalytic tests show that Au1Pd1/C outperforms commercial Pd/C in the alkaline oxygen reduction reaction and ethanol oxidation reaction, confirming the strategy's value for developing high-performance electrocatalysts. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1063/5.0315778
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      – Code: eng
        Text: English
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        PageCount: 13
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      – SubjectFull: Self-diffusion (Solid state physics)
        Type: general
      – SubjectFull: Electrocatalysis
        Type: general
      – SubjectFull: Catalysts
        Type: general
      – SubjectFull: Alcohol oxidation
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      – SubjectFull: Oxygen reduction
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      – SubjectFull: Gold nanoparticles
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      – SubjectFull: Nanoparticle synthesis
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      – SubjectFull: Resistance heating
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      – TitleFull: Joule-heating empowers solid-state diffusion toward Au-based nanoalloys with optimal ensemble effect for efficient electrocatalysis.
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              Text: Mar2026
              Type: published
              Y: 2026
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