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<p>Styrene epoxidation is a crucial reaction in the chemical industry. However, low Faradaic efficiency (FE) and product selectivity severely limit the efficiency of (photo)electrocatalytic styrene epoxidation processes. This study designs an efficient photothermal catalytic system based on an Au/NiCo<sub>2</sub>O<sub>4</sub> photoanode, which achieves the product selectivity of 98% and FE of 96% for bromide-mediated styrene epoxidation when the styrene conversion reaches 94%, surpassing most current reports on photoelectrocatalytic styrene epoxidation. A comprehensive mechanistic study reveals that the photothermal effect of the Au/NiCo<sub>2</sub>O<sub>4</sub> photoanode enhances local temperature, which facilitates bromine species mass transfer, reduces reaction activation energy and accelerates the oxidation kinetics of Br<sup>−</sup>. This study elucidates the photothermal-driven reaction mechanism of styrene epoxidation, providing guidelines for designing efficient and stable photothermal catalytic technologies.</p>

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Plasmon-assisted photothermal catalysis for efficient styrene epoxidation on Au/NiCo2O4 photoanodes

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Zongjun Yu,
  • Jiaming Wang,
  • Zhenlin Chen,
  • Siqin Liu,
  • Yuchao Zhang,
  • Jincai Zhao

摘要

Styrene epoxidation is a crucial reaction in the chemical industry. However, low Faradaic efficiency (FE) and product selectivity severely limit the efficiency of (photo)electrocatalytic styrene epoxidation processes. This study designs an efficient photothermal catalytic system based on an Au/NiCo2O4 photoanode, which achieves the product selectivity of 98% and FE of 96% for bromide-mediated styrene epoxidation when the styrene conversion reaches 94%, surpassing most current reports on photoelectrocatalytic styrene epoxidation. A comprehensive mechanistic study reveals that the photothermal effect of the Au/NiCo2O4 photoanode enhances local temperature, which facilitates bromine species mass transfer, reduces reaction activation energy and accelerates the oxidation kinetics of Br−. This study elucidates the photothermal-driven reaction mechanism of styrene epoxidation, providing guidelines for designing efficient and stable photothermal catalytic technologies.