A citric acid-assisted deposition strategy to synthesize mesoporous SiO2-confined highly dispersed LaMnO3 perovskite nanoparticles for n-butylamine catalytic oxidation

Chen, Huawei; Yang, Yanran; Liu, Qing; Cui, Mifen; Chen, Xian; Fei, Zhaoyang; Tao, Zuliang; Wang, Minghong; Qiao, Xu

doi:10.1039/c8ra10636c

Cited by 12 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the loading amount is 100%, the SSA of catalyst is still as large as 194.40 m 2 /g. Chen et al 22 dispersed LaMnO 3 perovskite catalyst on mesoporous SiO 2 with different method. The SSA of LaMnO 3 /SiO 2 synthesized by the sol–gel method is 205 m 2 /g, which is lower than the most of LM/HZSM‐5 catalyst in this work.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Zhou

et al. 2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Due to the large amounts of CO pollutant from iron ore sintering and vehicle emissions, the control of CO emission becomes more and more important for the environment. To control the emission of CO more effectively, the catalysts of LaMnO3 perovskite with HZSM‐5 zeolite as support were prepared by sol–gel method. The structure and catalytic activities of catalysts were characterized and analyzed. According to the results of X‐ray diffraction (XRD) and energy‐dispersive X‐ray spectroscopy (EDS), the LaMnO3 perovskite phase is successfully obtained in all the supported catalysts. The average particle sizes of supported catalysts are in the range of 15–38 μm. Compared with the perovskite catalysts loaded on other kinds of supports, LaMnO3 supported with HZSM‐5 has a larger specific surface area (SSA). The SSAs of supported catalysts with different loading amount are in the range of 190–300 m2/g. The HZSM‐5 support improves the catalytic activity of LaMnO3 catalyst by increasing the SSA. The activity of supported catalyst becomes higher when the loading amount increases from 20% to 60%. The catalyst with 60% perovskite loaded shows the best activity in CO catalytic oxidation. The CO conversion of 60LM/HZSM‐5 attains 50% and 90% at 172.7°C and 201.5°C, respectively. The activities of catalysts with 80% and 100% perovskite loaded decrease due to the accumulated pores formed by too much perovskite. The supported catalysts exhibit favorable activities in consecutive reaction cycles. It turns out that HZSM‐5 support is appropriate for the synthesis of active perovskite catalysts for CO oxidation.

show abstract

Section: Resultsmentioning

confidence: 99%

“…When the loading amount is 100%, the SSA of catalyst is still as large as 194.40 m 2 /g. Chen et al 22 The particle size distributions of HZSM-5 support and LM/HZSM-5 catalysts are shown in Figure 6. The results of average particle size are listed in Table 3.…”

Section: Catalytic Activitymentioning

confidence: 99%

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Zhou

et al. 2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…As proper candidates to precious metals, perovskite-type oxides (ABO 3 ) have attracted increasing attention due to their tunable structure. − However, the low specific surface area (less than 10 m 2 /g) and a trace of surface B-site cations over ABO 3 catalysts would restrain their catalytic activity. , Therefore, several methods were introduced to overcome the defect of ABO 3 catalysts. One method is synthesizing supported perovskite catalysts, which mainly dispersed perovskite-type oxides on different porous materials (mesoporous silica, Ce 1– x Zr x O 2 , Al 2 O 3 ). − The other methodology is to prepare large-surface-area ABO 3 materials used in the template strategy. To date, three-dimensionally ordered macroporous (3DOM) La 0.6 Sr 0.4 CoO 3 , Eu 0.6 Sr 0.4 FeO 3 , and other 3DOM-ABO 3 materials have been successfully prepared via the poly(methyl methacrylate) templating route. , Meanwhile, 3D-ABO 3 materials with different morphologies were also reported, such as La 1– x K x FeO 3−δ nanotubes and La 1– x Sr x Co 0.2 Fe 0.8 O 3−δ fibrous webs. , …”

Section: Introductionmentioning

confidence: 99%

Selectively Etching Lanthanum to Engineer Surface Cobalt-Enriched LaCoO₃ Perovskite Catalysts for Toluene Combustion

Chen

Cui

et al. 2020

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

As appropriate alternatives to precious metals in volatile organic compound (VOC) combustion, La-based perovskites have attracted increasing attention due to their tunable structure and sintering-resistance capacity. Herein, chemically tailored surface Co-enriched LaCoO3 perovskite oxides (LCO) with abundant surface defects were successfully constructed via a facile selective acid-etching method, in which lanthanum located at the A-site was preferentially dissolved and exsolved cobalt opportunely dispersed on the surface of the perovskite. The unique LCO catalysts could enhance the electron transfer and facilitate the activation of oxygen molecules through the interface Co2+/Co3+ redox cycles. Among all as-synthesized LCO catalysts, the LCO-20 sample (LaCoO3 treated with 1 M HNO3 for 20 min) revealed the optimum catalytic performance (T 50 and T 90 of 184 and 206 °C at a space velocity of 15 000 mL/(g h) with 1000 ppm toluene, respectively), stability, and durability (5 vol % water). The excellent activity of LCO-20 might be mainly ascribed to the accelerated activation and circulation of the oxygen species initiated by the surface defects and Co2+/Co3+ redox cycles.

show abstract

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO₂‐Confined Highly Dispersed LaMn_xCo_1‐xO₃ Perovskite Oxides in n‐Butylamine Combustion

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this study, highly‐dispersed perovskite‐type oxides LaMnxCo1‐xO3 supported on mesoporous SiO2 (LMxC1‐xO/SiO2) were synthesized by a citric acid‐assisted deposition method. For LMxC1‐xO/SiO2 catalysts, the double B‐site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn3++Co3+)/(Co2++Mn4+) redox cycle, both of which were able to improve the catalytic performance of LMxC1‐xO/SiO2 in n‐butylamine combustion. Strikingly, LM0.2C0.8O/SiO2 catalyst showed the optimum catalytic performance (T90%=210 °C at a space velocity of 15,000 mL gcat−1 h−1) and the lowest NOx yield among the LMxC1‐xO/SiO2 samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.

show abstract

A citric acid-assisted deposition strategy to synthesize mesoporous SiO₂-confined highly dispersed LaMnO₃ perovskite nanoparticles for n-butylamine catalytic oxidation

Abstract: A citric acid-assisted deposition strategy was applied to synthesize mesoporous SiO2-confined highly dispersed LaMnO3 perovskite nanoparticles with optimum catalytic performance and N2 selectivity.

Cited by 12 publications

References 49 publications

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Selectively Etching Lanthanum to Engineer Surface Cobalt-Enriched LaCoO₃ Perovskite Catalysts for Toluene Combustion

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO₂‐Confined Highly Dispersed LaMn_xCo_1‐xO₃ Perovskite Oxides in n‐Butylamine Combustion

Contact Info

Product

Resources

About

A citric acid-assisted deposition strategy to synthesize mesoporous SiO2-confined highly dispersed LaMnO3 perovskite nanoparticles for n-butylamine catalytic oxidation

Abstract: A citric acid-assisted deposition strategy was applied to synthesize mesoporous SiO2-confined highly dispersed LaMnO3 perovskite nanoparticles with optimum catalytic performance and N2 selectivity.

Cited by 12 publications

References 49 publications

Investigation of LaMnO3 catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Investigation of LaMnO3 catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Selectively Etching Lanthanum to Engineer Surface Cobalt-Enriched LaCoO3 Perovskite Catalysts for Toluene Combustion

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO2‐Confined Highly Dispersed LaMnxCo1‐xO3 Perovskite Oxides in n‐Butylamine Combustion

Contact Info

Product

Resources

About

A citric acid-assisted deposition strategy to synthesize mesoporous SiO₂-confined highly dispersed LaMnO₃ perovskite nanoparticles for n-butylamine catalytic oxidation

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Investigation of LaMnO₃ catalyst loaded on HZSM‐5 zeolite for CO catalytic oxidation

Selectively Etching Lanthanum to Engineer Surface Cobalt-Enriched LaCoO₃ Perovskite Catalysts for Toluene Combustion

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO₂‐Confined Highly Dispersed LaMn_xCo_1‐xO₃ Perovskite Oxides in n‐Butylamine Combustion