Elucidating the Nature of the Cu(I) Active Site in CuO/TiO2 for Excellent Low-Temperature CO Oxidation

被引：69

作者：

Fang, Yarong ^{[1
]}

Chi, Xiao ^{[3
]}

Li, Li ^{[1
]}

Yang, Ji ^{[1
]}

Liu, Shoujie ^{[1
]}

Lu, Xingxu ^{[2
]}

Xiao, Wen ^{[4
]}

Wang, Liming ^{[5
]}

Luo, Zhu ^{[1
]}

Yang, Weiwei ^{[1
]}

Hu, Siyu ^{[1
]}

Xiong, Juxia ^{[1
]}

Hoang, Son ^{[1
]}

Deng, Hongtao ^{[1
]}

Liu, Fudong ^{[6
]}

Zhang, Lizhi ^{[1
]}

Gao, Puxian ^{[2
]}

Ding, Jun ^{[4
]}

Guo, Yanbing ^{[1
]}

机构：

[1] Cent China Normal Univ, Inst Environm & Appl Chem, Coll Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China

[2] Univ Connecticut, Dept Chem Mat & Biomol Engn, Inst Mat Sci, Storrs, CT 06269 USA

[3] Natl Univ Singapore, Singapore Synchrotron Light Source, Singapore 117603, Singapore

[4] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[5] Chinese Acad Sci, CAS Key Lab Biomed Effects Nanomat & Nanosafety, Inst High Energy Phys, Dept Mat Sci & Engn, Beijing 100049, Peoples R China

[6] Univ Cent Florida, NanoSci Technol Ctr, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 06期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Ti-doped CuO; Ti-O-Cu hybridization; stabilized Cu+; CO adsorption; activated O; CATALYTIC-ACTIVITY; MANGANESE OXIDE; HIGH-EFFICIENCY; SURFACE SITES; MIXED OXIDES; CU2+ SITES; COPPER; OXYGEN; EPR; REDUCTION;

D O I：

10.1021/acsami.9b18264

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Stabilized Cu+ species have been widely considered as catalytic active sites in composite copper catalysts for catalytic reactions with industrial importance. However, few examples comprehensively explicated the origin of stabilized Cu+ in a low-cost and widely investigated CuO/TiO2 system. In this study, mass producible CuO/TiO2 catalysts with interface-stabilized Cu+ were prepared, which showed excellent low-temperature CO oxidation activity. A thorough characterization and theoretical calculations proved that the strong charge-transfer effect and Ti-O-Cu hybridization in Ti-doped CuO(111) at the CuO/TiO2 interface contributed to the formation and stabilization of Cu+ species. The CO molecule adsorbed on Cu+ and reacted directly with Ti doping-promoted active lattice oxygen via a Mars-van Krevelen mechanism, leading to the enhanced low-temperature activity.

引用

页码：7091 / 7101

页数：11

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