Quenching-lnduced Defect-Rich Platinum/Metal Oxide Catalysts Promote Catalytic Oxidation

Yanan Chong; Tingyu Chen; Yifei Li

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Quenching-lnduced Defect-Rich Platinum/Metal Oxide Catalysts Promote Catalytic Oxidation

机译：Quenching-lnduced Defect-Rich Platinum/Metal Oxide Catalysts Promote Catalytic Oxidation

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Enhancing oxygen activation through defect engineering is an effective strategy for boosting catalytic oxidation performance.Herein, we demonstrate that quenching is an effective strategy for preparing defect-rich Pt/metal oxide catalysts with superior catalytic oxidation activity.As a proof of concept, quenching of a-Fe2O3 in aqueous Pt(NO3)2 solution yielded a catalyst containing Pt single atoms and clusters over defect-rich a-Fe2O3 (Pt/Fe2O3-Q), which possessed state-of-the-art activity for toluene oxidation.Structural and spectroscopic analyses established that the quenching process created abundant lattice defects and lattice dislocations in the a-Fe2O3 support, and stronger electronic interactions between Pt species and Fe2O3 promote the generation of higher oxidation Pt species to modulate the adsorption/desorption behavior of reactants.In situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) characterization studies and density functional theory (DFT) calculations determined that molecular oxygen and Fe2O3 lattice oxygen were both activated on the Pt/Fe2O3-Q catalyst.Pt/CoMn2O4, Pt/ MnO2 and Pt/LaFeO3 catalysts synthesized by the quenching method also offered superior catalytic activity for toluene oxidation.Results encourage the wider use of quenching for the preparation of highly active oxidation catalysts.

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《Environmental Science & Technology: ES&T》 |2023年第14期|5831-5840|共10页
作者
Yanan Chong; Tingyu Chen; Yifei Li;
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作者单位

School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510000 Guangdong China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
quenching; lattice defects; activation of oxygen; electronic metal—support interaction; toluene oxidation;

Quenching-lnduced Defect-Rich Platinum/Metal Oxide Catalysts Promote Catalytic Oxidation

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