Engineering CuOx-ZrO2-CeO2nanocatalysts with abundant surface Cu species and oxygen vacancies toward high catalytic performance in CO oxidation and 4-nitrophenol reduction

被引:27
作者
Liu, Baolin [1 ]
Li, Yizhao [1 ,2 ]
Qing, Shaojun [3 ]
Wang, Kun [1 ]
Xie, Jing [1 ]
Cao, Yali [1 ]
机构
[1] Xinjiang Univ, Inst Appl Chem, Key Lab Energy Mat Chem, Key Lab Adv Funct Mat,Minist Educ, Urumqi 830046, Xinjiang, Peoples R China
[2] Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Xinjiang, Peoples R China
[3] Chinese Acad Sci, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
WATER-GAS SHIFT; PREFERENTIAL OXIDATION; CUO-CEO2; CATALYSTS; TRANSITION-METALS; FACILE SYNTHESIS; SOLID-SOLUTIONS; CEO2; NANORODS; CERIA; COPPER; OXIDE;
D O I
10.1039/d0ce00588f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Highly dispersed surface Cu species and oxygen vacancies are important for CuOx-CeO(2)catalysts in many reactions, but it is difficult to increase the concentrations of highly dispersed Cu species and oxygen vacancies simultaneously by only adding a Cu component. Herein, CuOx-ZrO2-CeO2(CZC) nanocatalysts with different ratios of Cu/Zr have been effectively produced by a simple solvent-free synthetic strategy. The effect of Zr doping on the structure and reactivity of the CuOx-CeO(2)catalysts has been investigated with the help of carbon monoxide (CO) oxidation and 4-nitrophenol (4-NP) reduction as model reactions. It is revealed that the introduction of Zr relieved the agglomeration of surface Cu species, produced more oxygen vacancies in the interior and Cu(+)species on the surface of the catalyst, and increased the reducibility of CuOx-CeO2. The CZC catalysts show remarkably enhanced catalytic activity due to the abundant surface active sites and the improved redox properties provided by the suitable doping of Zr into CuOx-CeO2. This work not only offers a practicable way to reconstruct the distribution of active metals on the metal oxide support but also provides a high-efficiency strategy to prepare oxide catalysts with excellent catalytic performance.
引用
收藏
页码:4005 / 4013
页数:9
相关论文
共 55 条
[1]   Ionic Liquid-Assisted Sonochemical Preparation of CeO2 Nanoparticles for CO Oxidation [J].
Alammar, Tarek ;
Noei, Heshmat ;
Wang, Yuemin ;
Gruener, Wolfgang ;
Mudring, Anja-Verena .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2015, 3 (01) :42-54
[2]   Three-dimensional Cu/C porous composite: Facile fabrication and efficient catalytic reduction of 4-nitrophenol [J].
Bai, Yaowen ;
Wang, Qinzhi ;
Du, Chunbao ;
Bu, Tong ;
Liu, Yingnan ;
Sun, Xinyu ;
Luo, Weifang ;
Li, Rui ;
Zhao, Yijian ;
Zheng, Xiaohan ;
Wang, Li .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2019, 553 :768-777
[3]   Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Sc, Ti, V, Cu and Zn [J].
Biesinger, Mark C. ;
Lau, Leo W. M. ;
Gerson, Andrea R. ;
Smart, Roger St. C. .
APPLIED SURFACE SCIENCE, 2010, 257 (03) :887-898
[4]   Fractional-hydrolysis-driven formation of nonuniform dopant concentration catalyst nanoparticles of Cr/CexZr1-xO2 and their catalysis in oxidation of NO [J].
Cai, Wei ;
Zhong, Qin ;
Zhang, Shule ;
Zhao, Wei .
CHEMICAL ENGINEERING JOURNAL, 2014, 236 :223-232
[5]   Chemistry - Oxygen vacancies and catalysis on ceria surfaces [J].
Campbell, CT ;
Peden, CHF .
SCIENCE, 2005, 309 (5735) :713-714
[6]   Preferential oxidation of CO in H2 stream over Au/MnO2-CeO2 catalysts [J].
Chang, Li-Hsin ;
Sasirekha, Natarajan ;
Chen, Yu-Wen ;
Wang, Wei-Jye .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2006, 45 (14) :4927-4935
[7]   Facile and Mild Strategy to Construct Mesoporous CeO2-CuO Nanorods with Enhanced Catalytic Activity toward CO Oxidation [J].
Chen, Guozhu ;
Xu, Qihui ;
Yang, Ying ;
Li, Cuncheng ;
Huang, Taizhong ;
Sun, Guoxin ;
Zhang, Shuxiang ;
Ma, Dongling ;
Li, Xu .
ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (42) :23538-23544
[8]   Optimum Preferential Oxidation Performance of CeO2-CuOx-RGO Composites through Interfacial Regulation [J].
Ding, Junfang ;
Li, Liping ;
Li, Huixia ;
Chen, Shaoqing ;
Fang, Shaofan ;
Feng, Tao ;
Li, Guangshe .
ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (09) :7935-7945
[9]   Surface engineering on CeO2 nanorods by chemical redox etching and their enhanced catalytic activity for CO oxidation [J].
Gao, Wei ;
Zhang, Zhiyun ;
Li, Jing ;
Ma, Yuanyuan ;
Qu, Yongquan .
NANOSCALE, 2015, 7 (27) :11686-11691
[10]   Influence of the copper coverage on the dispersion of copper oxide and the catalytic performance of CuO/CeO2(rod) catalysts in preferential oxidation of CO in excess hydrogen [J].
Guo, Xiaolin ;
Mao, Jianxin ;
Zhou, Renxian .
JOURNAL OF POWER SOURCES, 2017, 371 :119-128