Effects of La incorporation in catalytic activity of Ag/La-CeO2 catalysts for soot oxidation

Lee, Jae-Sung; Lee, Min Woo; Kim, Min June; Lee, Jae‐Hwan; Lee, Eun Jun; Jung, Chang Ho; Choung, Jin Woo; Kim, Chang Hwan; Lee, Kwan Young

doi:10.1016/j.jhazmat.2021.125523

Cited by 44 publications

(12 citation statements)

References 49 publications

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“…In the past literature, the results had showed that the noble and base metals, rare earth elements, transition metals, and mixed oxides with perovskite and spinel structures had a positive catalytic effect on the oxidation of fumes (Sacco et al 2022 ). The oxides of Pt, Ce, Pd, Zr, La, Pr, Mn, Cu, Ag, Ca, Y, Al, K, Ti, and other materials had been used as candidate materials for catalysts for DPF regeneration in the laboratory (Chen et al 2022 ) (Zhou et al 2015 ) (Ura et al 2011 ) (Lee et al 2021a ) (Serve et al 2019 ).…”

Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

“…It is worth noting that the calculation of catalyst oxygen vacancy formation energy by density functional theory (DFT) method plays a key role in the description of catalyst. For example, Lee et al (Lee et al 2021a ) introduced the generalized gradient approximation (GGA) of the Perdew Burke Ernzerhof (PBE) functional to determine the catalyst exchange correlation and used the projection enhanced wave (PAW) method to describe the core and valence electrons. DFT calculation confirmed that the interaction between Ag and La was weaker than that between Ag and Ce, and Ag adsorbed on La was easy to migrate to the Ce domain, while Ag and Ce were strongly bound.…”

Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

See 1 more Smart Citation

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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Diesel particulate filter (DPF) is considered as an effective method to control particulate matter (PM) emissions from diesel engines, which is included in the mandatory installation list by more and more national/regional laws and regulations, such as CHINA VI, Euro VI, and EPA Tier3. Due to the limited capacity of DPF to contain PM, the manufacturer introduced a method of treating deposited PM by oxidation, which is called regeneration. This paper comprehensively summarizes the most advanced regeneration technology, including filter structure, new catalyst formula, accurate soot prediction, safe and reliable regeneration strategy, uncontrolled regeneration and its control methods. In addition, due to the change of working conditions in the regeneration process, the additional emissions during regeneration are discussed in this paper. The DPF is not only the aftertreatment device but also can be combined with diesel oxidation catalyst (DOC), selective catalytic reduction (SCR) and exhaust recirculation (EGR). In addition, the impact of DPF modification on the original system of some old models has been reasonably discussed in order to achieve emission targets.

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Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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“…Lee et al examined the effect of varying La concentrations in Ag/La-CeO 2 catalysts for soot oxidation. 106 The incorporation of La was found to enhance the formation of surface oxygen vacancies on the Ag/CeO 2 catalyst. The incorporation of an optimal amount of La in Ag/La-CeO 2 catalysts resulted in superior performance in the oxidation of soot particles.…”

Section: Investigate the Crucial Role Of Specific Metals In Catalytic...mentioning

confidence: 97%

Recent Progress on Density Functional Theory Calculations for Catalytic Control of Air Pollution

Ma,

Xiong,

Zhang

et al. 2023

ACS EST Eng.

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With the urgent demand for environmental protection and sustainable development, the field of environmental catalysis has received increasing attention. The further development of environmental catalysis is limited by the understanding of reaction processes at the atomic and molecular levels. It has become a research tendency to apply theoretical calculations to assist research in the field of air pollution control. Density functional theory (DFT) calculations have been utilized to research the surface structural characteristics of catalysts, explore the mechanisms of catalytic reactions, and design suitable catalysts for environmental catalysis applications. This Review provides an overview of the basic approach of DFT calculations. Specific applications of DFT in environmental catalysis, focusing on oxide catalysts, are extensively explored, including CO oxidation, volatile organic compound (VOC) oxidation, NO x reduction, soot oxidation, and other reactions. Finally, we point out the challenges associated with DFT and potential future prospects in the battle to control air pollution. This Review paves the way for the further design of efficient and stable catalytic materials.

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“…Studies have shown that the use of rare-earth metals can also lead to good activity against soot oxidation. Lee's group 196 synthesized Ag/La-CeO 2 catalysts with various lanthanum contents, and their catalytic activity exhibited a volcano trend. When an appropriate amount of lanthanum was incorporated in Ag/CeO 2 , the peroxide generation and reducibility improved, thereby enhancing the soot oxidation performance.…”

Section: Cerium-based Oxide Catalysts For Soot Eliminationmentioning

confidence: 99%

Construction of cerium-based oxide catalysts with abundant defects/vacancies and their application to catalytic elimination of air pollutants

Gao,

Yu,

Zhou

et al. 2023

J. Mater. Chem. A

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Effects of La incorporation in catalytic activity of Ag/La-CeO2 catalysts for soot oxidation

Cited by 44 publications

References 49 publications

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Recent Progress on Density Functional Theory Calculations for Catalytic Control of Air Pollution

Construction of cerium-based oxide catalysts with abundant defects/vacancies and their application to catalytic elimination of air pollutants

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