Oxidative degradation of phenol via in-situ generation of H2O2 in a flow reactor

Li, Rongjian, Lewis, Richard J., Dummer, Nicholas F. ORCID: https://orcid.org/0000-0002-0946-6304, Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731, Kitching, Ella, Slater, Thomas ORCID: https://orcid.org/0000-0003-0372-1551 and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 2025. Oxidative degradation of phenol via in-situ generation of H2O2 in a flow reactor. Catalysis Letters 155 (11) , 373. 10.1007/s10562-025-05221-3

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Abstract

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:

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Research Institutes & Centres > Cardiff Catalysis Institute (CCI) Schools > Chemistry
Publisher:	Springer
ISSN:	1011-372X
Funders:	EPSRC
Projects:	EP/Y023587/1, EP/Y023609/1, EP/Y023536/1, EP/Y023552/1, EP/Y023544/1
Date of First Compliant Deposit:	29 October 2025
Date of Acceptance:	12 October 2025
Last Modified:	25 Aug 2026 22:10
URI:	https://orca.cardiff.ac.uk/id/eprint/181969

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