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<p>AuPd nanoalloys are shown to offer significantly enhanced catalytic performance for both the direct synthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and the in-situ oxidative degradation of phenol. Under conditions where limited phenol conversion is observed using commercial H<sub>2</sub>O<sub>2</sub>, the bimetallic Au–Pd system facilitates efficient in-situ generation of H<sub>2</sub>O<sub>2</sub> and associated reactive oxygen species (ROS), enabling phenol conversion rates exceeding 70%. By optimizing key reaction parameters, near-complete phenol degradation was achieved, alongside the effective breakdown of intermediate phenolic by-products. Notably, unlike earlier reported systems, the optimized 0.5%Au-0.5%Pd/TiO<sub>2</sub> catalyst exhibited excellent stability, maintaining consistent performance over 50&#xa0;h of continuous operation, highlighting the potential to apply the in-situ approach for long-term application in advanced water treatment processes.</p> Graphical Abstract <p></p>

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Oxidative Degradation of Phenol via In-situ Generation of H2O2 in a Flow Reactor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月23日

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  • Rong-Jian Li,
  • Richard J. Lewis,
  • Nicholas F. Dummer,
  • David J. Morgan,
  • Ella Kitching,
  • Thomas Slater,
  • Graham J. Hutchings

摘要

AuPd nanoalloys are shown to offer significantly enhanced catalytic performance for both the direct synthesis of hydrogen peroxide (H2O2) and the in-situ oxidative degradation of phenol. Under conditions where limited phenol conversion is observed using commercial H2O2, the bimetallic Au–Pd system facilitates efficient in-situ generation of H2O2 and associated reactive oxygen species (ROS), enabling phenol conversion rates exceeding 70%. By optimizing key reaction parameters, near-complete phenol degradation was achieved, alongside the effective breakdown of intermediate phenolic by-products. Notably, unlike earlier reported systems, the optimized 0.5%Au-0.5%Pd/TiO2 catalyst exhibited excellent stability, maintaining consistent performance over 50 h of continuous operation, highlighting the potential to apply the in-situ approach for long-term application in advanced water treatment processes.

Graphical Abstract