CO2 hydrogenation on Co/CeO2-δ catalyst: Morphology effect from CeO2 support

Xie, Fengqiong; Xu, Shiyu; Liu, Deng; Xie, Hongmei; Zhou, Guilin

doi:10.1016/j.ijhydene.2020.05.260

Cited by 39 publications

(13 citation statements)

References 41 publications

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“…Therefore, a suitable catalyst is developed, and CO 2 methanation is realized at a low reaction temperature, which is feasible to achieve high efficiency resource utilization of CO 2 . The supported catalysts, which mainly include VIII B group metal (e.g., Ni, 7–10 Co, 1,11 Rh, 12,13 Ru, 14–16 Pd, 17,18 etc.) as the active component, are widely used in CO 2 methanation reaction.…”

Section: Introductionmentioning

confidence: 99%

Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Zhou

Tian

et al. 2021

Greenhouse Gases

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Supported Co/KIT‐6 catalyst, which has high specific surface area and well‐developed ordered mesoporous structure, was prepared by wet impregnation method. Its physicochemical properties were characterized by transmission electron microscopy (TEM), Brunner–Emmet–Teller (BET), Low‐angle XRD, in situ X‐ray photoelectron spectroscopy (in situ XPS) and H2‐temperature program reduction (H2‐TPR), and its catalytic properties were investigated by CO2 hydrogenation. The in situ XPS and H2‐TPR results indicated that Co oxide species could be reduced by H2 to highly dispersed active metal Co species. The highly dispersed active metal Co species are the main CO2 hydrogenation active centers. CO2 molecules could be reduced by active metal Co species to generate CO molecules and promote CO2 methanation. The prepared Co catalyst presented high CO2 catalytic hydrogenation activities and stability. The CO2 conversion exceeds 47%, and CO and CH4 selectivity reaches 25.6% and 74.4% at 400°C within the range of reaction time of 500 min, respectively. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Zhou

Tian

et al. 2021

Greenhouse Gases

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“…However, the CeO 2 support of Ni/W mainly exposes (111) and (110) crystal faces with spacing of 0.31 and 0.19 nm, respectively (Figure 4G and H). The crystal plane spacing between the crystal planes is orderly and compact, and the crystal plane spacing is sound and balanced, which indicates that the Ni/CeO 2 catalysts has favorable crystallization property 29 . Previous literature has shown that the crystal plane energy of CeO 2 supports can follow the following order: (111) > (100) > (110) 30 .…”

Section: Resultsmentioning

confidence: 93%

“…On the TEM image with high magnification, fine Ni particles with size of around 1.4 nm can be seen over the reduced Ni/F catalyst (Figure 4B and Table 2). In addition, HRTEM results indicate that the CeO 2 ‐Flower material mainly exposes (111) and (100) crystal faces (Figure 4C, D, K, and L), with spacing of 0.31 and 0.27 nm, 29 respectively. However, the CeO 2 support of Ni/W mainly exposes (111) and (110) crystal faces with spacing of 0.31 and 0.19 nm, respectively (Figure 4G and H).…”

Section: Resultsmentioning

confidence: 99%

Ni/CeO₂ catalysts for low‐temperature CO₂ methanation: Identifying effect of support morphology and oxygen vacancy

et al. 2021

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In order to investigate the effect of support morphology and oxygen vacancy on the low temperature catalytic activity of Ni‐based catalyst for CO2 methanation, three Ni/CeO2 catalysts were prepared by impregnation method, in which CeO2 materials with different morphology of flowerlike, nanowire, and bulk were used. The characterization results showed that the morphology of CeO2 exhibited a significant effect on the preferential exposed crystal planes, which led to the change of oxygen vacancy concentration and metal dispersion, resulting in the enhancement of catalytic activity at low temperature. Among all catalysts, the nanowire‐like Ni/CeO2 catalyst (Ni/W) showed the highest CO2 conversion due to its enhanced oxygen vacancy concentration and CO2 adsorption capacity of the catalyst. In situ DRIFTS experiment showed that the intermediate product of Ni/W catalyst reaction route was formate. In a 100 h–400°C–lifetime test, Ni/W catalyst also showed excellent long‐term stability. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…The adsorption and desorption characteristics of hydrogen usually reflected the ability of the catalyst to adsorb and activate H 2 molecules, as well as the ability to provide active hydrogen species for the hydrogenation reaction. During the heat treatment, the increase of external energy leads to the breaking of chemical bonds and therefore drove the desorption of active hydrogen species from the catalyst surface 48 . The property of metallic Ni was calculated on the basis of adsorbed hydrogen, and the results were listed in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…During the heat treatment, the increase of external energy leads to the breaking of chemical bonds and therefore drove the desorption of active hydrogen species from the catalyst surface. 48 The property of metallic Ni was calculated on the basis of adsorbed hydrogen, and the results were listed in Table 3. When the NiO content continued increasing, the particle size of metallic Ni increased by more than 20% to 8.3 nm for 10Ni/CeO 2 , and 46% to 10.1 nm for 15NiCeO 2 , correspondingly, both the Ni dispersion and Ni surface decreased largely (more than 50%).…”

Section: Metallic Active Center Property By Chemisorptionmentioning

confidence: 99%

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst

Liu

Liang

Jing

et al. 2022

Intl J of Energy Research

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Summary A series of Ni/CeO2 catalysts with different Ni loadings was prepared by the impregnation method, and characterized by XRD, N2 adsorption/desorption isotherms, H2‐TPR, H2‐TPD, NH3‐TPD, Pyridine probed FT‐IR, TEM, XPS, EPR, and TG to study the crystalline phase, porosity, redox, dispersion of metal species, acid property, chemical state of surface and coke. The addition of Ni decreased efficiently the apparent activation energy by more than 14%. The correlation analysis revealed that the loading of NiO had profound influences on particle size and acidity which need to be well coordinated to get good catalytic performance. In the hydrogenation of levulinic acid using formic acid as the hydrogen source, the 5Ni/CeO2 catalyst with moderate Ni particle size of 6.9 nm and appropriate acidic strength distribution (Strong/Weak = ca. 2.8) demonstrated superior catalytic performance with a levulinic acid conversion of 73% and a γ‐valerolactone selectivity of 90%. The 5Ni/CeO2 among the bimetallic catalysts showed the best coke resistance (0.32 gC/gcat.) despite the fact that coke deposition was still inevitable during the reaction.

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CO2 hydrogenation on Co/CeO2-δ catalyst: Morphology effect from CeO2 support

Cited by 39 publications

References 41 publications

Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Ni/CeO₂ catalysts for low‐temperature CO₂ methanation: Identifying effect of support morphology and oxygen vacancy

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst

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CO2 hydrogenation on Co/CeO2-δ catalyst: Morphology effect from CeO2 support

Cited by 39 publications

References 41 publications

Role of Co species on Co/KIT‐6 catalyst surface in CO2 hydrogenation

Role of Co species on Co/KIT‐6 catalyst surface in CO2 hydrogenation

Ni/CeO2 catalysts for low‐temperature CO2 methanation: Identifying effect of support morphology and oxygen vacancy

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO 2 catalyst

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Product

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Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Ni/CeO₂ catalysts for low‐temperature CO₂ methanation: Identifying effect of support morphology and oxygen vacancy

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst