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

被引：30

作者：

Chong, Yanan ^{[1
]}

Chen, Tingyu ^{[1
]}

Li, Yifei ^{[1
]}

Lin, Jiajin ^{[1
]}

Huang, Wei-Hsiang ^{[2
,3
]}

Chen, Chi-Liang ^{[2
,3
]}

Jin, Xiaojing ^{[4
]}

Fu, Mingli ^{[1
]}

Zhao, Yun ^{[1
]}

Chen, Guangxu ^{[1
]}

Wei, Jiake ^{[8
]}

Qiu, Yongcai ^{[1
]}

Waterhouse, Geoffrey I. N. ^{[5
]}

Ye, Daiqi ^{[1
]}

Lin, Zhang ^{[6
]}

Guo, Lin ^{[7
]}

机构：

[1] South China Univ Technol, Sch Environm & Energy, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Atmospher Environm & Pollut, Guangzhou 510000, Guangdong, Peoples R China

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[3] Natl Taiwan Univ Sci & Technol NTUST, Grad Inst Appl Sci & Technol, Taipei 10607, Taiwan

[4] Shunde Polytech, Coll Light Chem Ind & Mat Engn, Foshan 528333, Peoples R China

[5] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand

[6] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

[7] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China

[8] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2023年 / 57卷 / 14期

基金：

中国国家自然科学基金;

关键词：

quenching; lattice defects; activation of oxygen; electronic metal-support interaction; toluene oxidation; HEMATITE NANORODS; ACTIVE-SITES; METAL-OXIDES; OXYGEN; EVOLUTION;

D O I：

10.1021/acs.est.2c09795

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 alpha-Fe2O3 in aqueous Pt(NO3)2 solution yielded a catalyst containing Pt single atoms and clusters over defect-rich alpha- 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 alpha-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.

引用

页码：5831 / 5840

页数：10

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