Direct decomposition of methane over SBA-15 supported Ni, Co and Fe based bimetallic catalysts

Pudukudy, Manoj; Yaakob, Zahira; Akmal, Zubair Shamsul

doi:10.1016/j.apsusc.2015.01.032

Cited by 139 publications

(48 citation statements)

References 62 publications

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“…It is reported that, the presence of carbon oxides in the hydrogen feed has a detrimental effect on the performance of proton exchange membrane (PEM) and alkaline fuel cells due to its poisonous effect. The purification of hydrogen is a high cost and a complicated process, since it uses several advanced technologies including membrane reactors [11].…”

Section: Introductionmentioning

confidence: 99%

Thermocatalytic decomposition of methane to COx-free hydrogen and carbon over Ni–Fe–Cu/Al2O3 catalysts

Bayat

Meshkani

Rezaei

2016

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

Thermocatalytic decomposition of methane to COx-free hydrogen and carbon over Ni–Fe–Cu/Al2O3 catalysts

Bayat

Meshkani

Rezaei

2016

International Journal of Hydrogen Energy

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“…To face this challenge, bimetallic catalysts, with the participation of small amounts of a dopant, were studied in order to improve the methane conversion and extend the catalyst lifetime. A wide variety of metals, such as Cu, Pt, Pd, Co, Fe, or Mo, have been explored as promoters of Ni-based catalysts in order to improve their activity under more appropriate operating conditions to obtain hydrogen and/or their yield to better quality carbon nanofilaments [12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

2018

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The catalytic decomposition of methane (CDM) process produces hydrogen in a single stage and avoids CO 2 emission thanks to the formation of high added value carbon nanofilaments as a by-product. In this work, Ni monometallic and Ni-Co, Ni-Cu, and Ni-Fe bimetallic catalysts are tested in the CDM reaction for the obtention of fishbone carbon nanofibers (CNF). Catalysts, in which Al 2 O 3 is used as textural promoter in their formulation, are based on Ni as main active phase for the carbon formation and on Co, Cu, or Fe as dopants in order to obtain alloys with improved catalytic behaviour. Characterization of bimetallic catalysts showed the formation of particles of Ni alloys with a bimodal size distribution. For the doping content studied (5 mol. %), only Cu formed an alloy with a lattice constant high enough to be able to favor the carbon diffusion through the catalytic particle against surface diffusion, resulting in higher carbon formations, longer activity times, and activity at 750 • C; whereas Ni, Ni-Co, and Ni-Fe catalysts were inactive. On the other hand, Fe also improved the undoped catalyst performance presenting a higher carbon formation at 700 • C and the obtention of narrow carbon nanofilaments from active Ni 3 Fe crystallites.

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“…At the same time, the most important role is played by the composition and structure of catalysts which determine the morphology and microstructure of the nanotubes grown over their surface. Metals, such as iron, cobalt, and nickel, and their compositions are commonly used as catalysts for the synthesis of MWCNTs . It is known that the addition of a promoter to the catalyst can enhance the yield of nanotubes and affect their morphology.…”

Section: Introductionmentioning

confidence: 99%

Fe–Mo and Co–Mo Catalysts with Varying Composition for Multi‐Walled Carbon Nanotube Growth

Kazakova

Кузнецов

Bokova‐Sirosh

et al. 2017

Physica Status Solidi (b)

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The formation of active component of Fe-Mo and Co-Mo catalysts for carbon nanotube growth with variable Mo content is studied with in situ XRD, XPS, and STEM&EDX. The activation of bimetallic Fe-Mo catalysts under the growth conditions leads to the formation of Fe-Mo alloy particles in contrast to Co-containing catalysts in which active alloy incorporates only a small portion of Mo (<2-3 at.%). The stable carbide formation for these systems is not detected. The effect of Mo content in Fe-Mo and Co-Mo catalysts on the properties of MWCNTs is additionally investigated using the Raman spectroscopy in combination with measurements of the temperature dependence of conductivity. It is shown that MWCNT defectiveness depends on the active component composition for both Fe-Mo and Co-Mo catalysts. The current carrier concentration for the MWCNTs grown on Fe-Mo catalysts slightly increases with the Mo content. The opposite effect is observed for the tubes grown on Co-Mo catalysts, showing a decrease in the current carrier concentration with the increase of Mo concentration.

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Direct decomposition of methane over SBA-15 supported Ni, Co and Fe based bimetallic catalysts

Cited by 139 publications

References 62 publications

Thermocatalytic decomposition of methane to COx-free hydrogen and carbon over Ni–Fe–Cu/Al2O3 catalysts

Thermocatalytic decomposition of methane to COx-free hydrogen and carbon over Ni–Fe–Cu/Al2O3 catalysts

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

Fe–Mo and Co–Mo Catalysts with Varying Composition for Multi‐Walled Carbon Nanotube Growth

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