Study of Fe–Co mixed metal oxide nanoparticles in the catalytic low-temperature CO oxidation

Biabani-Ravandi, Abolfazl; Rezaei, Mehran; Fattah, Zohreh

doi:10.1016/j.psep.2012.10.015

Cited by 45 publications

(17 citation statements)

References 19 publications

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“…This is consistent with increasing cobalt content in the samples. This peak was expected at around 280 • C as reported by Biabani-Ravandi et al [29] and Del Arco et al [33], but the shift of this peak to about 340 • C is probably due to the strong interaction of Co and Fe and also the presence of CoFe 2 O 4 . The broad peaks with a small shoulder at about 430 • C in Co-Fe and 2Co-Fe indicates three reduction steps.…”

Section: Thermal Effectssupporting

confidence: 74%

“…3 shows the high magnification and diffraction patterns of both oxides. The selected area electron diffraction (SAED) pattern suggests that the oxides are polycrystalline, which is supported by low peak intensities obtained in the XRD diffactograms [29]. Table 1 shows a summary of the textural properties of the catalysts.…”

Section: Electron Microscopymentioning

confidence: 73%

“…The broad peaks with a small shoulder at about 430 • C in Co-Fe and 2Co-Fe indicates three reduction steps. Initially, Fe 2 O 3 is reduced to Fe 3 O 4 at about 410 • C, then CoO is reduced to Co 0 at about 570 • C and finally, Fe 3 O 4 is reduced to Fe 0 at about 720 • C [28,29]. The hydrogen consumption recorded at about 410 • C was 51, 18 and 10.2 mL/g for Co-Fe, 2Co-Fe and 3Co-Fe, respectively.…”

Section: Thermal Effectsmentioning

confidence: 95%

See 2 more Smart Citations

Preferential oxidation of CO in a hydrogen rich feed stream using Co–Fe mixed metal oxide catalysts prepared from hydrotalcite precursors

Qwabe

Friedrich

Singh

2015

Journal of Molecular Catalysis A: Chemical

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Section: Thermal Effectssupporting

confidence: 74%

Section: Electron Microscopymentioning

confidence: 73%

Section: Thermal Effectsmentioning

confidence: 95%

See 1 more Smart Citation

Preferential oxidation of CO in a hydrogen rich feed stream using Co–Fe mixed metal oxide catalysts prepared from hydrotalcite precursors

Qwabe

Friedrich

Singh

2015

Journal of Molecular Catalysis A: Chemical

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“…activation energy and order of reaction) (Royer and Duprez, 2011). In our previous work (Biabani-Ravandi et al, 2013b), XRD patterns of Fe-Co mixed oxides calcined at 500 ºC pretreated under reductive condition reveal that using H 2 -pretreat condition affected the crystalline structure of FC-500 and decreased the oxygen state of the catalyst. With passing H 2 flow over sample at 300 °C for 1h, the Co 3 O 4 crystalline phase of FC-500 was completely reduced to the CoO and metallic Co phases that have lower activity than the Co 3 O 4 toward CO oxidation.…”

Section: Operational Parameter Effects On the Catalytic Performancementioning

confidence: 85%

“…This might be due to the presence of hard agglomerates in the powders (Biabani-Ravandi et al, 2013b).…”

Section: Downloaded By [Gebze Yuksek Teknoloji Enstitïsu ] At 07:15 2mentioning

confidence: 99%

Synthesis, Characterization and Application of Co–MgO Mixed Oxides in Oxidation of Carbon Monoxide

Fattah

Rezaei

Biabani-Ravandi

et al. 2014

Chemical Engineering Communications

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The present work deals with the synthesis of nanostructured Co-MgO mixed oxides with different weight ratios of Cobalt by a facile co-precipitation method as a catalyst for low temperature CO oxidation. The prepared samples were characterized by X-ray diffraction (XRD), N 2 adsorption/desorption (BET), Fourier transform infrared spectroscopy (FTIR) and Transmission and scanning electron microscopies (TEM and SEM) techniques. The results revealed that inexpensive cobalt-magnesium mixed metal oxide nanoparticles have a high potential as catalyst in low temperature CO oxidation. The Co-MgO mixed oxide with 30 wt.% cobalt had the highest activity. The results showed that the catalysts pretreated under O 2 containing atmosphere possessed higher activity compared to the catalyst pretreated under H 2 atmosphere. Co-MgO catalyst showed a good repeatability in reaction condition. The stability test exhibited that the Co-MgO mixed oxides were highly stable for CO oxidation over a 30 h time on stream in the feed gas containing high amount of moisture and CO 2 . Downloaded by [Gebze Yuksek Teknoloji Enstitïsu ] at 07:15 23 December 2014 2

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Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

2014

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Methane dry reforming was studied over nanostructure bimetallic Ni‐Co‐MgO catalysts. The catalysts were prepared by coprecipitation with different Ni‐Co contents and characterized by XRD, BET, N2 adsorption/desorption, temperature‐programmed reduction (TPR), SEM, and temperature‐programmed oxidation (TPO) techniques. XRD results let conclude that all samples contained MgO crystallite phases. With a higher Ni content the intensity of the diffraction peaks became stronger, indicating growth of the crystallite size of the prepared solid solutions. BET analysis demonstrated that a higher Ni‐Co content decreased the surface area. The optimal catalyst could be determined which had the highest activity and a good stability in dry reforming reaction.

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Study of Fe–Co mixed metal oxide nanoparticles in the catalytic low-temperature CO oxidation

Cited by 45 publications

References 19 publications

Preferential oxidation of CO in a hydrogen rich feed stream using Co–Fe mixed metal oxide catalysts prepared from hydrotalcite precursors

Preferential oxidation of CO in a hydrogen rich feed stream using Co–Fe mixed metal oxide catalysts prepared from hydrotalcite precursors

Synthesis, Characterization and Application of Co–MgO Mixed Oxides in Oxidation of Carbon Monoxide

Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

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