A high efficient two phase CuO/Cu2(OH)3NO3(Co2+/Fe3+) composite catalyst for CO-PROX reaction

Veselovs’kyi, V. L.; Ischenko, Elena V.; Gaidai, Snizhana V.; Lisnyak, Vladyslav V.

doi:10.1016/j.catcom.2011.11.024

Cited by 24 publications

(3 citation statements)

References 22 publications

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“…Consequently, the strong chemisorption inhibits the CO conversion to intermediates of the formate series and methane. The same situation was observed earlier for the CO-PROX and CO oxidation reactions [24][25][26].…”

Section: Resultssupporting

confidence: 84%

“…A series of bimetallic Co100-xNix catalysts, where x is the mass percentage of metal, was obtained by wet route reported elsewhere in [23,24]. To prepare Co100-xNix catalysts, where x = 0, 10, 15, 20, 25, 40, 65, 70, 80, 85, 90, and 100 mass%, the calculated amounts of powdered Co and Ni metals (99.95%, Aldrich) were mixed and dissolved completely in concentrated nitric acid (55 vol.% HNO3).…”

Section: Methodsmentioning

confidence: 99%

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CO₂ methanation over Co–Ni catalysts

et al. 2020

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One of the major goals when creating new energy systems is to provide clean and affordable energy. Currently, there is an excessive increase in the cost of fossil fuels and natural gas because of increased energy consumption and the inability to meet demand. That is why it is necessary to find reliable renewable energy sources and processes that will produce energy materials without toxic by-products in order to preserve the environment and to ensuring sustainable development and a strong economy. From environmental safety reasons, this need has led to the development of the catalytic synthesis of energetic materials from greenhouse gases; in particular, this paper proposes an efficient approach to producing methane by hydrogenation of carbon dioxide over Co-Ni catalysts.

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Section: Resultssupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

CO₂ methanation over Co–Ni catalysts

et al. 2020

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“…However, owing to the limited activity of current WGS catalysts for complete CO conversion, a thermodynamically favored reaction at a low temperature, approximately 0.5–1.0 vol % of residual CO still remains in H 2 ‐stream and requires to be lowered to less than 100 ppm to avoid poisoning the anode of PEMFC . CO PROX reaction has been considered to be a straightforward and effective protocol for eliminating trace CO to purify hydrogen . The CO PROX reaction unit can be attached to a PEMFC (typically working at 80–100°C) or to a WGS reactor (typically working at 200–250°C), or it can also be a medium unit between a Fuel Cell and a WGS reactor for immobile electricity‐production station .…”

Section: Introductionmentioning

confidence: 99%

Novel Co‐Mn‐O nanosheet catalyst for CO preferential oxidation toward hydrogen purification

et al. 2014

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Co-Mn-O composite oxide nanosheet catalyst was successfully prepared using a facile urea-assisted one-step hydrothermal method in the absence of organic or organic templating reagent. Co-Mn-O nanosheet catalyst was optimized by varying hydrothermal process parameters such as molar ratio of Co-Mn to urea, hydrothermal temperature, and hydrothermal time. Various characterization techniques including scanning electron microscopy, X-ray diffraction, nitrogen adsorption, X-ray photoelectron spectroscopy, Raman spectroscopy, and H 2 temperature-programmed reduction were used to reveal the relationship between catalyst nature and catalytic performance in CO preferential oxidation (CO PROX) in excess H 2 . The developed Co-Mn-O nanosheet catalyst have demonstrated much superior catalytic performance to Co-Mn-O nanoparticle, particularly in the low temperature range, and 100% CO conversion over the developed Co-Mn-O nanosheet can be achieved in temperature range of 50 to 150 C at 10,000 mL g 21 h 21 of gas hourly space velocity in the standard feed. Furthermore, the almost complete CO removal over Co-Mn-O nanosheet at 125 C of low temperature with 94.9% selectivity can be achieved even in the simulated reformed gas. The excellent catalytic performance is ascribed to nanosheet morphology, more surface Co 31 , smaller average crystallite size, higher reducibility, and strong Co-Mn interaction. Catalytic stability investigation indicates the developed nanostructured catalyst exhibits high catalytic stability for CO PROX reaction in simulated gas. The developed Co-Mn-O nanosheet catalyst can be a potential candidate for catalytic elimination of trace CO from H 2 -rich gas for Proton exchange membrane fuel cell applications. Reaction conditions: 100 mg catalyst, GHSV 5 15,000 mL h 21 g 21 , 1.0 vol % CO, 1.0 vol % O 2 , 50 vol % H 2 , Ar balance. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] 242 Figure 8. The CO conversion (a) and O 2 selectivity to CO 2 (b) over the Co-Mn-O-ns samples prepared with diverse n Co-Mn/Urea . Reaction conditions: GHSV 5 15,000 mL h 21 g 21 , 1.0 vol % CO, 1.0 vol % O 2 , 50 vol % H 2 , Ar balance. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]

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Comparative study of magnesia‐supported highly‐dispersed CuO solids prepared by different methods in CO oxidation

et al. 2017

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Magnesia‐supported highly‐dispersed CuO solids were prepared by impregnation and mechanical mixing of CuO nanopowders with MgO. Additionally, ultrasound and mechanochemical treatment of CuO nanopowders mixed with MgO was performed. TEM and XRD studies indicate that the size of the CuO nanoparticles in solids depends on the method of preparation. Catalytic tests of these solids in the CO oxidation show that varying the method of catalyst preparation changes the temperature of the 100 % conversion CO by more than 130 °C. Fabrication of the CuO‐MgO catalysts via an easy mixing process using CuO nanopowder and cubic MgO gives the most active catalyst. Mechanochemical and/or ultrasound treatments lead to catalyst deactivation. Our results show that method of the catalyst preparation influences the catalyst performance mainly through varying the CuO nanoparticle size and CuO‐support interaction.

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A high efficient two phase CuO/Cu2(OH)3NO3(Co2+/Fe3+) composite catalyst for CO-PROX reaction

Cited by 24 publications

References 22 publications

CO₂ methanation over Co–Ni catalysts

CO₂ methanation over Co–Ni catalysts

Novel Co‐Mn‐O nanosheet catalyst for CO preferential oxidation toward hydrogen purification

Comparative study of magnesia‐supported highly‐dispersed CuO solids prepared by different methods in CO oxidation

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A high efficient two phase CuO/Cu2(OH)3NO3(Co2+/Fe3+) composite catalyst for CO-PROX reaction

Cited by 24 publications

References 22 publications

CO2 methanation over Co–Ni catalysts

CO2 methanation over Co–Ni catalysts

Novel Co‐Mn‐O nanosheet catalyst for CO preferential oxidation toward hydrogen purification

Comparative study of magnesia‐supported highly‐dispersed CuO solids prepared by different methods in CO oxidation

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CO₂ methanation over Co–Ni catalysts

CO₂ methanation over Co–Ni catalysts