Catalytic oxidation of carbon monoxide over nanostructured CeO2–Al2O3 prepared by combustion method using polyvinyl alcohol

Nhiệm, Đào Ngọc; Đại, Lưu Minh; Văn, Nguyễn Đức; Lim, Duong Thi

doi:10.1016/j.ceramint.2012.08.069

Cited by 19 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SEM images of the CeO 2 -Fe 2 O 3 mixed oxides were shown in Figure 5 with the CF molar ratio of 1 : 1 which were calcined at temperatures of 450 °C, 650 °C, and 850 °C for 2 h. It is observed that the surface of the CF450 sample was porous. This is the characteristic of materials that are prepared by the combustion method using organic compounds to create gels (Figure 5(a)) [48]. For the CF650 sample, the porous property became clear to many honeycomb-like cavities.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Pham

Trinh²,

Dang

et al. 2022

Adsorption Science & Technology

View full text Add to dashboard Cite

In this study, the CeO2-Fe2O3 mixed oxide catalysts have been prepared by combustion method using gel-created tartaric acid. The ability of effective carbon monoxide (CO) oxidation to carbon dioxide (CO2) by CeO2-Fe2O3 catalyst under low-temperature conditions was also demonstrated. The calcined CeO2-Fe2O3 material has a porous honeycomb structure and good gaseous absorption-desorption ability. The solid solution of CeO2-Fe2O3 mixed oxides was formed by the substitution of Fe+3 ions at some Ce4+ ion sites within the CeO2 crystal lattice. The results also showed that the calcination temperature and the molar ratio of Ce3+ ions to Fe3+ ions (CF) affected the formation of the structural phase and the catalytic efficiency. The catalytic properties of the CeO2-Fe2O3 mixed oxide were good at the CF ratio of 1 : 1, the average crystal size was near 70 nm, and the specific surface area was about 20.22 m2.g-1. The full conversion of CO into CO2 has been accomplished at a relatively low temperature of 270 °C under insufficient O2 conditions.

show abstract

Section: Resultsmentioning

confidence: 96%

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Pham

Trinh²,

Dang

et al. 2022

Adsorption Science & Technology

View full text Add to dashboard Cite

show abstract

“…The pure ceria sample and 20Zr:CeO 2 sample show the largest total mass losses, of ~2.85%. The 10Zr:CeO 2 exhibits a slightly smaller total mass loss of 2%, while the sample 30Zr:CeO 2 exhibits a small mass loss (~0.37%) below 100 • C, which is followed by continuous mass gain (~2.25%) to 1000 • C. A small mass loss below 100 • C, present in all samples (Figure 4a) and followed by a small endothermic peak on the DTA curve (Figure 4b), corresponds to the loss of water and other volatile adsorbed species [23][24][25]. All samples except 30Zr:CeO 2 show the greatest mass loss in the range between 150 and 350 • C, after which the mass remains unchanged.…”

Section: Ceo2mentioning

confidence: 97%

Combustion Synthesis of Zirconium-Doped Ceria Nanocatalyst

Mužina,

Kurajica,

Bach-Rojecky

et al. 2024

Crystals

View full text Add to dashboard Cite

Zirconium-doped ceria is a promising and extensively researched catalytic material with notable use in three-way catalytic converters, the oxidation of volatile organic compounds and solid oxide fuel cells. In this work, pure and zirconium-doped ceria nanoparticles (Ce1−xZrxO2, where x = 0, 0.1, 0.2, and 0.3) were prepared by combustion synthesis using glycine as the fuel and cerium and zirconium nitrate as oxidants. The obtained powders were characterized using X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, differential thermal and thermogravimetric analysis, UV–Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The combustion temperature increases with the increase in zirconium content in the samples, but the XRD patterns exclusively show ceria diffraction peaks. The crystallite sizes are in the range from 25.2 to 11.7 nm, and do not vary substantially after thermal treatment, indicating the good thermal stability of the prepared nanocatalysts. XPS analysis showed that the surface amount of zirconium is lower than the nominal and that the ceria sample with 10 mol. % of zirconium has a higher amount of oxygen vacancies than the 30 mol. % Zr-doped sample. The 10 mol. % Zr-doped sample displays the best catalytic activity in the BTEX (benzene, toluene, ethylbenzene, and o-xylene) oxidation process.

show abstract

“…The temperature corresponding to 50% CO conversion (T 50 ) is about 142 • C. By using the citric acid-nitrate spontaneous combustion method, Mahnaz et al [14] prepared LaMnO 3 catalysts with calcination temperatures of 600 • C and 900 • C and discovered that the CO conversion rate reached 90% at 162 • C and 228 • C, respectively. Cerium oxide exhibits remarkable catalytic performance due to its fluorite-type structure, good oxygen storage capacity, and ability to undergo reversible transformation into Ce 3+ and Ce 4+ [15]. Venkataswamy et al [16] employed the hydrothermal method, coprecipitation method, and gel sol method to fabricate catalysts with a fixed Ce:Mn ratio of 0.7:0.3.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ce-MnOx Composite Oxides via Coprecipitation and Their Catalytic Performance for CO Oxidation

Yang

Kang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Ce-MnOx composite oxide catalysts with different proportions were prepared using the coprecipitation method, and the CO-removal ability of the catalysts with the tested temperature range of 60–140 °C was investigated systematically. The effect of Ce and Mn ratios on the catalytic oxidation performance of CO was investigated using X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), H2 temperature programmed reduction (H2-TPR), CO-temperature programmed desorption (CO-TPD), and in situ infrared spectra. The experimental results reveal that under the same test conditions, the CO conversion rate of pure Mn3O4 reaches 95.4% at 170 °C. Additionally, at 140 °C, the Ce-MnOx series composite oxide catalyst converts CO at a rate of over 96%, outperforming single-phase Mn3O4 in terms of catalytic performance. With the decrement in Ce content, the performance of Ce-MnOx series composite oxide catalysts first increase and then decrease. The Ce MnOx catalyst behaves best when Ce:Mn = 1:1, with a CO conversion rate of 99.96% at 140 °C and 91.98% at 100 °C.

show abstract

Catalytic oxidation of carbon monoxide over nanostructured CeO2–Al2O3 prepared by combustion method using polyvinyl alcohol

Cited by 19 publications

References 11 publications

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Combustion Synthesis of Zirconium-Doped Ceria Nanocatalyst

Preparation of Ce-MnOx Composite Oxides via Coprecipitation and Their Catalytic Performance for CO Oxidation

Contact Info

Product

Resources

About

Catalytic oxidation of carbon monoxide over nanostructured CeO2–Al2O3 prepared by combustion method using polyvinyl alcohol

Cited by 19 publications

References 11 publications

Synthesis of CeO2-Fe2O3 Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Synthesis of CeO2-Fe2O3 Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Combustion Synthesis of Zirconium-Doped Ceria Nanocatalyst

Preparation of Ce-MnOx Composite Oxides via Coprecipitation and Their Catalytic Performance for CO Oxidation

Contact Info

Product

Resources

About

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation

Synthesis of CeO₂-Fe₂O₃ Mixed Oxides for Low-Temperature Carbon Monoxide Oxidation