Surface Lattice-Embedded Pt Single-Atom Catalyst on Ceria-Zirconia with Superior Catalytic Performance for Propane Oxidation

Wei Tan; Shaohua Xie; Yandi Cai

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Surface Lattice-Embedded Pt Single-Atom Catalyst on Ceria-Zirconia with Superior Catalytic Performance for Propane Oxidation

机译：Surface Lattice-Embedded Pt Single-Atom Catalyst on Ceria-Zirconia with Superior Catalytic Performance for Propane Oxidation

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Tuning the metal—support interaction and coordination environment of single-atom catalysts can help achieve satisfactory catalytic performance for targeted reactions. Herein, via the facile control of calcination temperatures for Pt catalysts on pre-stabilized Ce09Zr01O2 (CZO) support, Pt single atoms (Pt,) with different strengths of Pt- CeO2 interaction and coordination environment were successfully constructed. With the increase in calcination temperature from 350 to 750 0C, a stronger Pt-CeO2 interaction and higher Pt-O-Ce coordination number were achieved due to the reaction between PtO1 and surface Ce + species as well as the migration of Pt1 into the surface lattice of CZO. The Pt/CZO catalyst calcined at 750 0C (Pt/CZO-750) exhibited a surprisingly higher C3H8 oxidation activity than that calcined at 550 0C (Pt/CZO-550). Through systematic characterizations and reaction mechanism study, it was revealed that the higher concentration of surface Ce3+ species/oxygen vacancies and the stronger Pt-CeO2 interaction on Pt/CZO-750 could better facilitate the activation of oxygen to oxidize C3H8 into reactive carbonate/carboxyl species and further promote the transformation of these intermediates into gaseous CO2. The Pt/CZO-750 catalyst can be a potential candidate for the catalytic removal of hydrocarbons from vehicle exhaust.

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《Environmental Science & Technology: ES&T》 |2023年第33期|12501-12512|共12页
作者
Wei Tan; Shaohua Xie; Yandi Cai;
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作者单位

Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States;

Department of Civil, Environmental, and Construction Engineering Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States;

State Key Laboratory of Pollution Control and Resource Reuse, School of Environment;

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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
Pt single atom; calcination temperature; C3H8 oxidation reaction; Pt-CeO2 interaction; coordination environment;

Surface Lattice-Embedded Pt Single-Atom Catalyst on Ceria-Zirconia with Superior Catalytic Performance for Propane Oxidation

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