NO Oxidation on Lanthanum-Doped Ceria Nanoparticles with Controlled Morphology

Fernández-García, Susana; Tinoco, Miguel; Hungría, Ana B.; Chen, Xiaowei; Calvino, José J.; Martínez-Munuera, Juan Carlos; Giménez-Mañogil, Javier; Garcı́a-Garcı́a, Avelina

doi:10.3390/catal13050894

Cited by 3 publications

(2 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This results in the formation of Ce–La oxides solid solution without altering the face-centered cubic crystal structure of CeO 2 . It is also noteworthy that the Ce-La21- x samples show an overall shift toward lower diffraction angles, a phenomenon attributed to the incorporation of La into the crystal structure, resulting in increased crystal spacing . Furthermore, increasing the pH of the complexing-precipitation process by using NH 3 ·H 2 O leads to weaker and less defined XRD diffraction peaks.…”

Section: Resultsmentioning

confidence: 97%

Synthesis of a Ce–La Adsorbent with Large Adsorption Capacity for Efficient Fluoride Removal from Leaching Solution of Spent Lithium-Ion Batteries

Xu,

Gao,

Wang

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

The presence of fluoride in the leaching solution of spent lithium-ion batteries (LIBs) can harm product purity and the environment and potentially lead to the corrosion of recycling equipment. However, the development of fluoride adsorbents face challenges due to their limited adsorption capacity. Herein, flaky porous Ce−La oxides adsorbent with high metal content, synthesized using ammonia as a complexing and precipitating agent in a continuous stirred tank reactor (CSTR), are employed for fluoride removal. The maximum adsorption capacity of the Ce−La oxides adsorbent reaches up to 662.25 mg/g, greatly exceeding that of other reported adsorbents. Furthermore, the adsorbtent can be easily regenerated through desorption in NaOH solution in 0.5 h, with only an 8.4% decrease in adsorption capacity after four cycles. The F − concentration in the leaching solution of spent LiNi x Co y Mn 1−x−y O 2 (NCM)-based batteries can be reduced from 336.5 to 0.6 mg/L by the Ce−La oxides adsorbent, meeting the requirements for the production of battery grade Ni/Co/Mn sulfate solution. These results demonstrate that Ce−La oxides adsorbent with superior fluoride adsorption performance can be produced via a straightforward method that is suitable for large-scale production.

show abstract

Section: Resultsmentioning

confidence: 97%

Synthesis of a Ce–La Adsorbent with Large Adsorption Capacity for Efficient Fluoride Removal from Leaching Solution of Spent Lithium-Ion Batteries

Xu,

Gao,

Wang

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…At the same time, A. García-García et al also modified the Ce/spinel-based lean NO x -trapping (LNT) compositions with and without Ba with MnO x by initial wet impregnation. [45] By studying the effect of adding MnO x to the LNT composition based on MgAl 2 O 4 /CeO 2 at the adsorption temperature of 300 °C on the NO x storage/release performance, it can be found that the formation of MnO x layer on the spinel/ CeO 2 mixture can beneficially inhibit the formation of BaAl 2 O 4 and facilitate the formation of BaMnO 3 . In contrast to the previous study, the presence of Ba can inhibit the oxidation activity of NO, but this perovskite phase containing manganese (IV) has been shown to be very effective for NO x storage even at low NO 2 /NO ratios, which will also facilitate the catalytic process of soot oxidation.…”

Section: Other Structuresmentioning

confidence: 99%

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

Ma,

Guo,

Xiong

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

Environmental issues exert a significant influence on the human life. Soot particles have attracted attention as a major source of pollution. Significant progress has been made in the research of efficient soot combustion catalysts. The distinctive bonding properties on the 4f orbitals of rare earth elements exhibit excellent catalytic performance for soot combustion. This comprehensive review explores recent advancements in the design of catalysts based on rare earth oxides, with a specific focus on various catalytic materials (La‐based, Ce‐based, Pr‐based and other rare earth elements), synthesis methods, catalyst morphology, catalytic performance and the intricate mechanisms governing their performance in catalytic soot combustion. The activity and selectivity of different rare earth catalysts in various reaction atmospheres are also summarized in the article. Finally, the challenges associated with rare earth oxide‐based catalysts and their potential for future development in the soot combustion are highlighted. This review establishes a fundamental basis for the further design of catalytic materials that exhibit enhanced efficiency and stability.

show abstract

Atomistic insights from DFT calculations into the catalytic properties on ceria-lanthanum clusters for methane activation

Peraça,

Bittencourt,

Bezerra

et al. 2024

The Journal of Chemical Physics

View full text Add to dashboard Cite

Improving the catalytic performance of materials based on cerium oxide (CeO2) for the activation of methane (CH4) can be achieved through the following strategies: mixture of CeO2 with different oxides (e.g., CeO2–La2O3) and the use of particles with different sizes. In this study, we present a theoretical investigation of the initial CH4 dehydrogenation on (La2Ce2O7)n clusters, where n = 2, 4, and 6. Our framework relies on density functional theory calculations combined with the unity bond index–quadratic exponential potential approximation. Our results indicate that chemical species arising from the first dehydrogenation of CH4, that is, CH3 and H, bind through the formation of C–O and H–O bonds with the clusters, respectively. The coordination of the adsorption site and the chemical environment plays a crucial role in the magnitude of the adsorption energy; for example, species adsorb more strongly in the low-coordinated topO sites located close to the La atoms. Thus, it affects the activation energy barrier, which tends to be lower in configurations where the adsorption of the chemical species is stronger. During CH4 dehydrogenation, the CH3 radical can be present in a planar or tetrahedral configuration. Its conformation changes as a function of the charge transference between the molecule and the cluster, which depends on the CH3-cluster distance. Finally, we analyze the effects of the Hubbard effective parameter (Ueff) on adsorption properties, as the magnitude of localization of Ce f-states affects the hybridization of the interaction between the molecule and the clusters and hence the magnitude of the adsorption energies. We obtained a linear decrease in the adsorption energies by increasing the Ueff parameter; however, the activation energy is only slightly affected.

show abstract

NO Oxidation on Lanthanum-Doped Ceria Nanoparticles with Controlled Morphology

Cited by 3 publications

References 63 publications

Synthesis of a Ce–La Adsorbent with Large Adsorption Capacity for Efficient Fluoride Removal from Leaching Solution of Spent Lithium-Ion Batteries

Synthesis of a Ce–La Adsorbent with Large Adsorption Capacity for Efficient Fluoride Removal from Leaching Solution of Spent Lithium-Ion Batteries

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

Atomistic insights from DFT calculations into the catalytic properties on ceria-lanthanum clusters for methane activation

Contact Info

Product

Resources

About