A new insight on surface chemistry and redox species of transition metal (Fe, Mn) doped CeO2-SnO2/Al2O3 nanocomposites for automobile emission control

被引：0

作者：

Jayachandran, Varuna ^{[1
]}

Palanisami, Sanjeevi ^{[1
]}

Paneerselvam, Janardhanan ^{[1
]}

Elango, M. ^{[1
]}

Chakrabortty, Sabyasachi ^{[2
]}

Ghosh, Siddhartha ^{[3
]}

Albaqami, Munirah D. ^{[4
]}

Mohammad, Saikh ^{[4
]}

Sangaraju, Sambasivam ^{[5
]}

机构：

[1] PSG Coll Arts & Sci, Dept Phys, Coimbatore 641014, India

[2] SRM Univ AP Andhra Pradesh, Dept Chem, Amaravati 522502, Andhra Prades, India

[3] SRM Univ AP Andhra Pradesh, Dept Phys, Amaravati 522502, Andhra Prades, India

[4] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

[5] United Arab Emirates Univ, Natl Water & Energy Ctr, Al Ain 15551, U Arab Emirates

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 05期

关键词：

Ceria-tin/alumina; Transition metal; Catalysts; Air pollution; Diesel exhaust treatment; SELECTIVE CATALYTIC-REDUCTION; MIXED OXIDES; CERIUM OXIDE; STRUCTURAL-CHARACTERIZATION; REVERSED MICROEMULSION; SOOT COMBUSTION; NO REDUCTION; CO; OXIDATION; OXYGEN;

D O I：

10.1016/j.jece.2024.113896

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The ceria-tin/alumina mixed metal oxides (Ce/Sn =1) with different proportions of Fe & Mn dopants were synthesized and investigated in detailed approach for diesel emission reduction. The dopants created structural defects enhancing the oxygen ion mobility for exhaust treatment. The existence of surface-active oxygen sites and oxygen ion vacancy sites generated for charge compensation due to reduction of Ce4+, Sn4+ and dopants incorporation evidenced from XPS analysis. The Mn doped sample holds better physicochemical properties than Fe doped sample. The Mn doped sample with higher surface area of about 101.32 m(2) g(- 1) exhibits greater active sites for better catalytic activity. The redox couples in the Mn-doped sample Ce4+/Ce3+, Sn4+/Sn2+, and Mn3+/ Mn2+ helps in oxygen regeneration to contribute to exhaust treatment by oxygen ion conduction from bulk to the surface. This sample exhibited the 92 % of NOx reduction and proved to be a dynamic candidate for diesel emission reduction.

引用

页数：12

共 21 条

[21] Use of surface photovoltage spectroscopy to probe energy levels and charge carrier dynamics in transition metal (Ni, Cu, Fe, Mn, Rh) doped SrTiO3 photocatalysts for H2 evolution from water
Ma, Xiaoqing
Cui, Xiaoli
Zhao, Zeqiong
Melo, Mauricio A., Jr.
Roberts, Emily J.
Osterloh, Frank E.
JOURNAL OF MATERIALS CHEMISTRY A, 2018, 6 (14) : 5774 - 5781

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