CO2 hydrogenation to methane over mesoporous Co/SiO2 catalysts: Effect of structure

Zhou, Guilin; Liu, Huiran; Xing, Yingzhi; Xu, Shiyu; Xie, Hongmei; Xiong, Kun

doi:10.1016/j.jcou.2018.04.023

Cited by 77 publications

(31 citation statements)

References 41 publications

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“…In view of this fact, Liu et al [48] demonstrated that Co showed more favorable thermodynamics and lower CO 2 decomposition barriers for CO 2 reduction compared to Cu. In a similar manner, a close relationship between the CO 2 and H 2 adsorption capacity of Co/KIT-6 catalysts and their CO 2 conversion/selectivity performance has been revealed [87]. In particular, high H 2 adsorption capacity can provide a large number of active H species for the further hydrogenation of intermediate species (such as HCOO − ) to methane, whereas the low H 2 adsorption and activation capacity is favorable to CO formation.…”

Section: Co 2 Hydrogenation Activitymentioning

confidence: 62%

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

et al. 2019

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In this work we report on the combined impact of active phase nature (M: Co or Cu) and ceria nanoparticles support morphology (nanorods (NR) or nanocubes (NC)) on the physicochemical characteristics and CO2 hydrogenation performance of M/CeO2 composites at atmospheric pressure. It was found that CO2 conversion followed the order: Co/CeO2 > Cu/CeO2 > CeO2, independently of the support morphology. Co/CeO2 catalysts demonstrated the highest CO2 conversion (92% at 450 °C), accompanied by 93% CH4 selectivity. On the other hand, Cu/CeO2 samples were very selective for CO production, exhibiting 52% CO2 conversion and 95% CO selectivity at 380 °C. The results obtained in a wide range of H2:CO2 ratios (1–9) and temperatures (200–500 °C) are reaching in both cases the corresponding thermodynamic equilibrium conversions, revealing the superiority of Co- and Cu-based samples in methanation and reverse water-gas shift (rWGS) reactions, respectively. Moreover, samples supported on ceria nanocubes exhibited higher specific activity (µmol CO2·m−2·s−1) compared to samples of rod-like shape, disclosing the significant role of support morphology, besides that of metal nature (Co or Cu). Results are interpreted on the basis of different textural and redox properties of as-prepared samples in conjunction to the different impact of metal entity (Co or Cu) on CO2 hydrogenation process.

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Section: Co 2 Hydrogenation Activitymentioning

confidence: 62%

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

et al. 2019

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“…The produced SNG is easy to store and can be transported in existing natural gas pipelines. A variety of transition metals such as Ni [44][45][46], Co [47][48][49], Pd [50,51], Ru [52][53][54], Rh [55,56] have been widely investigated as active components for CO 2 methanation.…”

Section: Co 2 + Hmentioning

confidence: 99%

“…Among these metals, Ni and Co are promising candidates due to its lower cost than Pd, Ru, and Rh. A variety of oxide supports have been used for the CO 2 methanation that includes Al 2 O 3 [57][58][59], SiO 2 [47,60,61], TiO 2 [52,53,62,63], CeO 2 [50,61,64], NiO [65], Co 3 O 4 [66].…”

Section: Co 2 + Hmentioning

confidence: 99%

Noble-metal-free and Pt nanoparticles-loaded, mesoporous oxides as efficient catalysts for CO2 hydrogenation and dry reforming with methane

Sápi

Rajkumar

Ábel

et al. 2019

Journal of CO2 Utilization

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“…Silica and alumina stand out as the most commonly used catalytic supports due to such properties as their high surface area and high thermal and mechanical stability. [1][2][3] These physicochemical properties determine the design of well-dispersed and effective catalytic systems. 4 SiO 2 and γ-Al 2 O 3 also allow to vary the chemical properties (such as affinity to metal ions or acidity) of the catalysts, which can be advantageous in many chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

XPS characterization of cobalt impregnated SiO₂ and γ‐Al₂O₃

Cañón

Teplyakov

2021

Surface & Interface Analysis

101

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SiO2 and γ‐Al2O3 impregnation with nominal 10 and 20% of cobalt was examined using wet impregnation method starting with Co(NO3)2·6H2O. The samples were dried and analyzed by XPS prior to calcination to study the surface species in the solids and the role of the support in the processing of supported cobalt catalysts. The results showed that cobalt introduction alters the few top nanometers of the support materials as there are significant changes recorded in the XPS spectra. Most importantly, there is a remarkable similarity between the O 1s XPS signal of SiO2 and γ‐Al2O3 following Co 20% impregnation, which suggests that these materials could have similar properties in terms of the oxidation ability and the general redox behavior. The shift of Al 2p peaks to higher binding energy (BE) in the XPS investigations and the shift of Si 2p peaks to lower BE were observed for high nominal cobalt loading. These results suggest that the choice of the support in cobalt‐based catalysts would tune the chemical characteristics of cobalt in the final materials.

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CO2 hydrogenation to methane over mesoporous Co/SiO2 catalysts: Effect of structure

Cited by 77 publications

References 41 publications

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

Noble-metal-free and Pt nanoparticles-loaded, mesoporous oxides as efficient catalysts for CO2 hydrogenation and dry reforming with methane

XPS characterization of cobalt impregnated SiO₂ and γ‐Al₂O₃

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CO2 hydrogenation to methane over mesoporous Co/SiO2 catalysts: Effect of structure

Cited by 77 publications

References 41 publications

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

CO2 Hydrogenation over Nanoceria-Supported Transition Metal Catalysts: Role of Ceria Morphology (Nanorods versus Nanocubes) and Active Phase Nature (Co versus Cu)

Noble-metal-free and Pt nanoparticles-loaded, mesoporous oxides as efficient catalysts for CO2 hydrogenation and dry reforming with methane

XPS characterization of cobalt impregnated SiO2 and γ‐Al2O3

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Product

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XPS characterization of cobalt impregnated SiO₂ and γ‐Al₂O₃