Co–Mn-oxide spinel catalysts for CO and propane oxidation at mild temperature

Faure, Benjamin; Alphonse, Pierre

doi:10.1016/j.apcatb.2015.07.019

Cited by 113 publications

(3 citation statements)

References 46 publications

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“…Mn-and Co-based spinel oxides are excellent catalysts for VOC combustion. Benjamin et al successfully prepared Co-Mn-oxide spinel catalysts for CO oxidation at ambient temperature [23]. It has been reported that high-valence Mn in the cubic phase, including Mn 3+ and Mn 4+ , facilitated the adsorption and dissociation of oxygen and electron migration, thus showing better oxygen reduction performance.…”

Section: Introductionmentioning

confidence: 99%

A Low-Noble-Metal Ru@CoMn2O4 Spinel Catalyst for the Efficient Oxidation of Propane

Cui,

Zeng,

Hou

et al. 2024

Molecules

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Noble metals have become a research hotspot for the oxidation of light alkanes due to their low ignition temperature and easy activation of C-H; however, sintering and a high price limit their industrial applications. The preparation of effective and low-noble-metal catalysts still presents profound challenges. Herein, we describe how a Ru@CoMn2O4 spinel catalyst was synthesized via Ru in situ doping to promote the activity of propane oxidation. Ru@CoMn2O4 exhibited much higher catalytic activity than CoMn2O4, achieving 90% propane conversion at 217 °C. H2-TPR, O2-TPD, and XPS were used to evaluate the catalyst adsorption/lattice oxygen activity and the adsorption and catalytic oxidation capacity of propane. It could be concluded that Ru promoted synergistic interactions between cobalt and manganese, leading to electron transfer from the highly electronegative Ru to Co2+ and Mn3+. Compared with CoMn2O4, 0.1% Ru@CoMn2O4, with a higher quantity of lattice oxygen and oxygen mobility, possessed a stronger capability of reducibility, which was the main reason for the significant increase in the activity of Ru@CoMn2O4. In addition, intermediates of the reaction between adsorbed propane and lattice oxygen on the catalyst were monitored by in situ DRIFTS. This work highlights a new strategy for the design of a low-noble-metal catalyst for the efficient oxidation of propane.

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Section: Introductionmentioning

confidence: 99%

A Low-Noble-Metal Ru@CoMn2O4 Spinel Catalyst for the Efficient Oxidation of Propane

Cui,

Zeng,

Hou

et al. 2024

Molecules

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“…Combustion using supported catalysts is utilized in many industrial and environmental applications primarily for fuel reforming or purification, heat energy generation from fuels and to reduce air pollutant emissions from industrial fumes, underground ventilation air in coalmines, etc. 1 – 7 . The principle of catalytic combustion is also used in some special applications, for example in catalytic gas sensors, in which the heat of reaction gives information about the concentration of a combustible gas 8 .…”

Section: Introductionmentioning

confidence: 99%

Differential thermal analysis techniques as a tool for preliminary examination of catalyst for combustion

Yurchenko

Pernau

Engel

et al. 2023

Sci Rep

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The need for more economical catalysts for various combustion reactions is continuously driving catalyst development. We present Differential Thermal Analysis (DTA) and Differential Scanning Calorimetry (DSC) as suitable techniques for fast examination of catalyst activity for combustion reactions. The heat of reaction ΔHr generated at the catalyst in a combustible atmosphere is the measure for estimating the capability of the catalyst. Present investigations verify the reliability of both methods for the pre-selection of catalysts for further extensive investigations. To simplify the measurements and the result evaluation, a new measurement routine is introduced which is more suitable for rapid catalyst investigation than the conventional approach. For initial investigations, oxidation of 1% methane on a cobalt oxide catalyst was used. First, DTA measurements were performed. The vessel size and the amount of catalyst are considered as factors influencing the thermal signal. Simultaneous mass spectrometry measurements were used to better understand the formation of the DTA response. Comparable DSC investigations were then conducted. Finally, the behavior of catalyst was compared with two commercial palladium/alumina catalysts using DTA and DSC. Our investigations show that DTA and DSC are powerful methods to identify potential catalysts in a fast and reproducible manner, provided that all parameters influencing the thermal signal are kept constant.

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“…It has been displayed that increasing the specific surface area or decreasing the particle size could ameliorate the activity of Co 3 O 4 (Zhu et al, 2013;Bai et al, 2013). Modification of catalyst also includes composite oxides with another metal oxide via the synergistic effects to enhance the activity (Faure and Alphonse, 2016;Xu et al, 2015) or doping the trace elements (Cai et al, 2018;Carabineiro et al, 2015) via the mutual interaction to get high dispersion of oxide phases.…”

Section: Introductionmentioning

confidence: 99%

Abatement of Harmful Carbon Monoxide Over the Nickle Doped Co3 O4 Catalyst

LIU¹,

Sie²,

Tang³

et al. 2023

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This work aimed at evaluating the effect of nickle (Ni) dopant on the catalytic performance of Co3 O4 catalyst for abatement of harmful carbon monoxide (CO), a resistance toward sintering and durability of catalytic activity were also pursued. Choose the Co(NO3 )2 ×6H2 O(aq) as precursor and NaOH as precipitant to prepare cobalt oxide (Co3 O4 ) with precipitation method, then calcined at 300 and 500 °C, separately (named as C3 and C5). The Ni dopant (0.1 ~ 5 wt%) was added by deposited precipitation through Ni(NO3)2 ×6H2 O(aq) with drop wisely added NaOH(aq) into suspended Co3 O4 solution, then put the NaOCl for oxidation to obtain series 0.1%Ni-Co3 O4 , 0.2%Ni-Co3 O4 , 1%Ni-Co3 O4 and 5%Ni-Co3 O4 catalysts. All catalysts were characterized through BET, XRD, TEM/SEM, Raman, ICP and TPR instruments, and evaluated the catalytic performance of CO oxidation with a self-devised fluidized micro-reactor. It was observed that the calcination temperature and loading of dopant remarkably influenced the physicochemical characteristics and catalytic performance of the catalysts. Preferential catalyst was obtained for calcination at 300 °C and loading of Ni dopant below 1%. The doping of Ni on the surface of Co3 O4 enhanced the performance due to the inducing of synergistic effect between Co3 O4 and NiO, while the excessive NiO incorporated to the surface constrained the activity due to the abundant NiO on the surface, overlaying the active sites caused the decreasing of surface area and reducible capacity. Among these series Ni-Co3 O4 catalysts, the 0.2%Ni-Co3 O4 (C3) catalyst behaved an eminent activity with T50 of 98 °C and durability without apparent deactivation for 50 hr reaction at 125 °C. The excellent performance is primarily attributed to the synergistic effect and formation of NiCo2 O4 composite oxide.

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Co–Mn-oxide spinel catalysts for CO and propane oxidation at mild temperature

Cited by 113 publications

References 46 publications

A Low-Noble-Metal Ru@CoMn2O4 Spinel Catalyst for the Efficient Oxidation of Propane

A Low-Noble-Metal Ru@CoMn2O4 Spinel Catalyst for the Efficient Oxidation of Propane

Differential thermal analysis techniques as a tool for preliminary examination of catalyst for combustion

Abatement of Harmful Carbon Monoxide Over the Nickle Doped Co3 O4 Catalyst

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