Unraveling multi-channel oxygen species activation pathways on spinel catalysts: From surface redox dynamics to reactivity modulation in VOCs oxidation processes

Abstract

Reactive oxygen species (ROS) play a central role in redox catalysis over spinel oxides, contributing to both thermal and electrochemical oxidation processes, especially in the removal of volatile organic compounds (VOCs). Species such as lattice oxygen (O_latt) and adsorbed oxygen (O_ads) govern catalytic performance through structure-dependent activation and regeneration pathways. This review critically evaluates three major strategies for tuning ROS behavior: surface defect engineering, lattice doping and interface construction. This study delves into the activation and migration mechanisms of diverse oxygen species at the surface and bulk phases of metal oxides from an electronic perspective. Using spinel oxides renowned for their complex and abundant surface-active oxygen species as research object, we systematically synthesized the molecular dynamics (MD) and density functional theory (DFT) calculations reported in existing literature to elucidate the intrinsic correlations between oxygen species and the reaction rates of the catalytic oxidation processes of various VOCs. Based on existing research, this work proposes rational design principles for spinel-based catalysts in oxidation reactions, aiming to advance the rational development of next-generation VOCs oxidation catalysts.

Keywords

Reactive oxygen species / VOCs oxidation / Spinel oxides / Catalyst design / Reaction mechanism

CRediT authorship contribution statement

Sheng Zhang: Writing – review & editing, Writing – original draft. Kaihang Zhang: Supervision. Bin Wang: Writing – review & editing. Yanjie Liang: Writing – review & editing. Hongyuan Ma: Writing – review & editing. Sunwen Xia: Writing – review & editing. John Crittenden: Supervision. Dong Wang: Supervision.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (U23A2099, 22276111, and 52400134), the National Key R&D Program of China (2023YFC3710300), the Natural Science Foundation of Shandong Province (ZR2024JQ010, and 2023HWYQ-024), the Taishan Scholar Project of Shandong Province (TSQN 202306031), and the Youth Innovation Team Project of Shandong Provincial Education Department (2022KJ028). The views and ideas expressed herein are solely those of the authors and do not represent the opinions of the funding agencies in any form.

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