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<p>Direct Alcohol Fuel Cells are a promising, sustainable technology for energy generation that use renewable fuels like long and short-chain alcohols derived from biomass. These fuels are low in toxicity and easy to transport and store. A major challenge, however, is finding efficient electrocatalysts. The most common catalyst, platinum, is expensive, scarce, and prone to poisoning. This study introduces a new catalyst based on a gold-copper (AuCu) alloy. The synthesized AuCu nanocubes (NCs) were characterized for their structural properties. UV–Vis spectroscopy confirmed the alloy’s formation, while X-ray diffraction revealed its face-centered cubic crystalline structure. Scanning electron microscopy showed a homogeneous distribution of NCs, with an average size of 30–50&#xa0;nm. The study evaluated the electrocatalytic performance of AuCu/C and AuCu-Pd/C catalysts for ethanol electro-oxidation. The AuCu-Pd/C catalyst demonstrated superior stability, efficiency, and resistance to poisoning, showing promise as a viable alternative to traditional platinum-based catalysts.</p> Graphical abstract <p></p>

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Synthesis and physicochemical and electrochemical characterization of AuCu and AuCu-Pd nanoparticles for the electro-oxidation of alcohols

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月22日

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  • F. Mares-Briones,
  • Y. Medrano,
  • O. Villalobos-Izquierdo,
  • J. L. López-Miranda,
  • M. Estevez,
  • R. Esparza

摘要

Direct Alcohol Fuel Cells are a promising, sustainable technology for energy generation that use renewable fuels like long and short-chain alcohols derived from biomass. These fuels are low in toxicity and easy to transport and store. A major challenge, however, is finding efficient electrocatalysts. The most common catalyst, platinum, is expensive, scarce, and prone to poisoning. This study introduces a new catalyst based on a gold-copper (AuCu) alloy. The synthesized AuCu nanocubes (NCs) were characterized for their structural properties. UV–Vis spectroscopy confirmed the alloy’s formation, while X-ray diffraction revealed its face-centered cubic crystalline structure. Scanning electron microscopy showed a homogeneous distribution of NCs, with an average size of 30–50 nm. The study evaluated the electrocatalytic performance of AuCu/C and AuCu-Pd/C catalysts for ethanol electro-oxidation. The AuCu-Pd/C catalyst demonstrated superior stability, efficiency, and resistance to poisoning, showing promise as a viable alternative to traditional platinum-based catalysts.

Graphical abstract