Effect of A-site deficiency in LaMn0.9Co0.1O3 perovskites on their catalytic performance for soot combustion

Dinamarca, Robinson; Garcı́a, Ximena; Jiménez, Romel; Fierro, J.L.G.; Pecchi, Gina

doi:10.1016/j.materresbull.2016.05.007

Cited by 32 publications

(16 citation statements)

References 53 publications

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“…Additionally, the mapping of the surface of the catalyst containing La 0.75 Ag 0.25 FeO 3 shows that silver precipitations are present on the surface of the perovskite layer. Other researchers point to the low solubility of silver in LaMO 3 perovskites, where M = Mn, Co, Fe [4,15,[22][23][24][25]. XPS tests show that the metallic silver present on the surface of La 1−x Ag x FeO 3 perovskites, x = 0.1, 0.15, 0.25, is coated with a thin film of Ag x O, which suggests that Ag 0 undergoes superficial oxidation during perovskite preparation.…”

Section: Activity Of the Catalysts In Methane Oxidationmentioning

confidence: 99%

“…They show very good catalytic properties and are less expensive than noble metals, and they can be used as catalysts to oxidize hydrocarbons and carbon oxide, and as threeway catalysts (TWC) . Perovskites LaFeO 3 [12] and LaMn 0.9 Co 0.1 O 3 [23] show good properties, which are further improved by introducing Ag into the perovskite, for the oxidation of carbon black. R 1−x A x MnO 3 perovskite manganites (where R is a rare earth cation and A is a doping cation) exhibit great magnetoresistance and the magnetocaloric effect [24].…”

Section: Introductionmentioning

confidence: 99%

“…As a result of a cation deficit, an oxygen deficit or an oxygen excess in position A or B non-stoichiometry may arise in the perovskite [4,5,24,25]. Oxygen vacancies are more common than cation vacancies in the perovskite's structure [23].…”

Section: Introductionmentioning

confidence: 99%

“…However, there is no agreement between researchers as to the amount of silver which can be incorporated into the crystal lattice of perovskites. This may be due to the large number of different synthesis methods, co-precipitation [1,2,15,21,30,31], citrate-gel [3,4,23], sol-gel [5,27,29], such as solid-state reaction [26][27][28], flame pyrolysis [5], polyol [32], hydrothermal [33], combustion [24,25,34], spray decomposition [21] and microemulsion methods [35], used in the investigations. Hien et al [27] and Ye et al [28] found that using various methods to synthesize La 1−x Ag x MnO 3+δ perovskite, a single perovskite phase is obtained at x < 0.2.…”

Section: Introductionmentioning

confidence: 99%

“…When hydrothermal synthesis was used at x > 0.04, Ag 2 O 3 was found in addition to the perovskite [24]. In the case of La 1−x Ag x Mn 0.9 Co 0.1 O 3 prepared using the citrate method, an Ag 2 O phase, the amount of which increased with the Ag content in the perovskite, was observed [23]. A single phase of La 0.8 Ag 0.15 MnO 3 perovskite was obtained using rapid solution combustion synthesis and oxalyl dihydrazine as the fuel [24].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Silver Addition to LaFeO3 Perovskite on the Activity of Monolithic La1−xAgxFeO3 Perovskite Catalysts in Methane Hexane Oxidation

et al. 2019

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La 1−x Ag x FeO 3 (x = 0.05-0.25) perovskites deposited on a honeycomb-shaped monolithic metallic support were used as catalysts for the total oxidation of hydrocarbons. Monolithic catalysts were prepared by washcoating honeycomb substrates with lanthanum-stabilized γ-Al 2 O 3 , on which La 1−x Ag x FeO 3 was deposited. Catalysts with La 1−x Ag x FeO 3 perovskites show higher activity for methane oxidation at x ≥ 0.05 and hexane oxidation at x ≥ 0.1 than LaFeO 3 catalyst. The perovskite catalysts were characterized by XRD, XPS, SEM, TEM, TPR-H 2 , O 2-TPD and BET specific surface area measurement. Ag forms solid solutions with the La 1−x Ag x FeO 3 perovskite lattice for x = 0.05-0.1. In La 1−x Ag x FeO 3 perovskites (x ≥ 0.1), Ag 0 particles with average crystallite sizes from 31 to 41 nm were also identified. When Ag is introduced into the LaFeO 3 perovskite, both the changes occurring after some Ag is incorporated into its structure and the presence of large crystallites of metallic silver contribute to the catalysts' activity increase.

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Section: Activity Of the Catalysts In Methane Oxidationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Silver Addition to LaFeO3 Perovskite on the Activity of Monolithic La1−xAgxFeO3 Perovskite Catalysts in Methane Hexane Oxidation

et al. 2019

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Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

Yang

Sun

et al. 2022

Energy & Environ Materials

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Volatile organic compounds are a kind of important indoor and outdoor air pollutants. In recent years, more and more attention has been paid to the ways of volatile organic compound elimination because of its potential long‐term effects on human health. Among the various available methods for volatile organic compound elimination, the catalytic combustion is the most attractive method due to its high efficiency, low cost, simple operation, and easy scale‐up. Perovskite oxides, as a large family of metal oxides with their A‐site mainly of lanthanide element and/or alkaline earth metal element and B‐site of transition metal element, have been extensively investigated as active and stable catalysts for volatile organic compound removal reactions due to their abundant compositional elements, high thermal/chemical stability, and compositional/structural flexibility. The catalytic performance of perovskite oxides is strongly depended on its material composition, morphology, and surface/bulk properties, while the doping, tailored synthesis route, and composite construction may have a significant effect on the bulk (oxygen vacancy concentration, lattice structure), surface (oxygen species, defect) properties, and particulate morphology, consequently the catalytic activity and stability for volatile organic compound removal. Herein, a comprehensive review about the recent advances in perovskite oxides for volatile organic compound elimination reactions based on catalytic combustion is presented from different aspects with a special emphasis on the material design strategies, such as compositional tuning, morphology control, nanostructure building, hybrid construction, and surface modification. At last, some perspectives are presented on the development and design of perovskite oxide‐based catalysts for volatile organic compound removal applications by highlighgting the critical issues and challenges.

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Activity and Stability of Cu‐Based Spinel‐Type Complex Oxides for Diesel Soot Combustion

Zhang

Zhu

et al. 2021

ChemistrySelect

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A series of Cu‐based spinel‐type complex oxides (CuB2O4, B=Fe, Mn, Co and Cr) was synthesized via sol‐gel method for soot combustion. The soot combustion was accelerated in the presence of all prepared CuB2O4 catalysts compared to that without catalyst. The CuCo2O4 catalyst exhibited the best catalytic activity, with the soot combustion temperatures T10, T50 and T90 of 480 °C, 539 °C and 569 °C, respectively. XRD patterns showed that the catalysts were mainly in spinel phase. The H2‐TPR, XPS and O2‐TPD characterizations revealed that the interactions between cobalt and copper led to higher content of the Cu+ species, better redox properties and abundant adsorbed oxygen species than the other three catalysts, which contributed to soot combustion. In addition, the catalytic activity of the CuCo2O4 catalysts on soot combustion were facilitated in the presence of NO, while water vapor inhibited the catalytic activity. Besides, the cycle tests clarified that CuCo2O4 catalyst exhibited good stability.

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Effect of A-site deficiency in LaMn0.9Co0.1O3 perovskites on their catalytic performance for soot combustion

Cited by 32 publications

References 53 publications

Effect of Silver Addition to LaFeO3 Perovskite on the Activity of Monolithic La1−xAgxFeO3 Perovskite Catalysts in Methane Hexane Oxidation

Effect of Silver Addition to LaFeO3 Perovskite on the Activity of Monolithic La1−xAgxFeO3 Perovskite Catalysts in Methane Hexane Oxidation

Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

Activity and Stability of Cu‐Based Spinel‐Type Complex Oxides for Diesel Soot Combustion

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