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Enhancement of chlorine on Pd catalyst for H2O2 in-situ synthesis in electro-Fenton system: Kinetics and Mechanism
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  • Linhui Lu,
  • Qingli Shu,
  • Guiru Zhang,
  • Qi Zhang,
  • Ping Du,
  • Xuedong Zhu
Linhui Lu
East China University of Science and Technology

Corresponding Author:15957149112@163.com

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Qingli Shu
East China University of Science and Technology
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Guiru Zhang
Shanghai Jiao Tong University
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Qi Zhang
East China University of Science and Technology
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Ping Du
Chinese Research Academy of Environmental Sciences
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Xuedong Zhu
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Palladium-based catalyst has been widely employed in electro-Fenton process for in-situ generation of H2O2. However, the selectivity to H2O2 achieved so far is still far below application level. In this work, a series of Cl-FePd/γ-Al2O3/Al catalysts were prepared by a three-step-impregnation method, exhibiting excellent activity in H2O2 in-situ synthesis and high efficiency in phenol degradation. The characterization results showed that the Cl could assist in increasing the content of Pd0 and reducing the isoelectric point of catalyst, leading to the dramatic promotion in synthesis of H2O2. Moreover, theoretical calculation and kinetics further demonstrated that the Cl doping could facilitate the main reaction in H2O2 synthesis, as well as inhibit side reactions, including the dissociation of O-O bond, hydrogenation and decomposition. Furthermore, plausible mechanism and degradation pathways were elaborated based on ESR and GC-MS results. These findings illustrate the value of palladium-based Cl-FePd/γ-Al2O3/Al catalyst in its application in electro-Fenton process.
19 Oct 2021Submitted to AIChE Journal
20 Oct 2021Submission Checks Completed
20 Oct 2021Assigned to Editor
28 Oct 2021Reviewer(s) Assigned
09 Feb 2022Editorial Decision: Revise Major
25 Mar 20221st Revision Received
27 Mar 2022Submission Checks Completed
27 Mar 2022Assigned to Editor
29 Mar 2022Reviewer(s) Assigned
06 May 2022Editorial Decision: Revise Minor
10 May 20222nd Revision Received
14 May 2022Submission Checks Completed
14 May 2022Assigned to Editor
24 May 2022Editorial Decision: Accept