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<p>Long-lasting catalysts are essential for advancing the industrial application of catalysis. Catalyst performance decreased over time with increased usage. This study investigated the electrocatalytic performance and structural evolution of porous Cu/Cu<sub><i>x</i></sub>O during CH<sub>3</sub>OH oxidation. Results indicate the catalyst undergoes oxidation during CH<sub>3</sub>OH electrocatalysis, maintaining effectiveness for 200&#xa0;cycles. Increased oxide content in porous Cu/Cu<sub><i>x</i></sub>O leads to coarsened ligaments, reduced pore size, and improved corrosion resistance. These structural modifications inhibit the diffusion of OH<sub>ads</sub> and reduce the generation of CuOOH. Meanwhile, they impair the replenishment of lattice oxygen in Cu<sub>2</sub>O, and ultimately attenuate the catalytic activity of the oxidizable regions. Mechanical stirring alleviates these issues by changing the reaction control from electrochemical to diffusion, thereby prolonging the effective catalytic reaction to 500&#xa0;cycles. Additionally, regularly replacing the electrolyte helps slow the decline in electrocatalytic performance. We summarize and analyze the electrocatalytic performance related to various morphologies to elucidate the mechanism behind the morphology evolution of porous Cu/Cu<sub><i>x</i></sub>O. The findings highlight that pore size and corrosion resistance were key factors affecting its use as a battery catalyst.</p>

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Performance evolution of porous Cu/CuxO(x = 2,1) in the whole life cycle for methanol oxidation

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Rong Liu,
  • Qing Yang,
  • Jie Zhang,
  • Yingxin Geng,
  • Shaodong Sun

摘要

Long-lasting catalysts are essential for advancing the industrial application of catalysis. Catalyst performance decreased over time with increased usage. This study investigated the electrocatalytic performance and structural evolution of porous Cu/CuxO during CH3OH oxidation. Results indicate the catalyst undergoes oxidation during CH3OH electrocatalysis, maintaining effectiveness for 200 cycles. Increased oxide content in porous Cu/CuxO leads to coarsened ligaments, reduced pore size, and improved corrosion resistance. These structural modifications inhibit the diffusion of OHads and reduce the generation of CuOOH. Meanwhile, they impair the replenishment of lattice oxygen in Cu2O, and ultimately attenuate the catalytic activity of the oxidizable regions. Mechanical stirring alleviates these issues by changing the reaction control from electrochemical to diffusion, thereby prolonging the effective catalytic reaction to 500 cycles. Additionally, regularly replacing the electrolyte helps slow the decline in electrocatalytic performance. We summarize and analyze the electrocatalytic performance related to various morphologies to elucidate the mechanism behind the morphology evolution of porous Cu/CuxO. The findings highlight that pore size and corrosion resistance were key factors affecting its use as a battery catalyst.