CO2 methanation over ordered mesoporous NiRu-doped CaO-Al2O3 nanocomposites with enhanced catalytic performance

Liu, Qing; Wang, Shengjia; Zhao, Guoming; Yang, Hongyuan; Meng, Yuan; An, Xia; Zhou, Haifeng; Qiao, Yingyun; Tian, Yuanyu

doi:10.1016/j.ijhydene.2017.11.052

Cited by 91 publications

(65 citation statements)

References 73 publications

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“…Transmission electron microscopy (TEM JEM‐2100F) with energy dispersive X‐ray spectrometry (EDS) was employed to analyze the microstructures of the synthesized products. The N 2 adsorption–desorption curves were determined with a V‐sorb 2800 series analyzer at 77 K …”

Section: Methodsmentioning

confidence: 99%

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Dong

Zhang

et al. 2018

Eur J Inorg Chem

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Cobalt phosphide/reduced graphene oxide (CoP/RGO) nanohybrid materials have been prepared by a simple chemical precipitation method and a low‐temperature phosphorization process. Ultrafine CoP nanoparticles are loaded uniformly onto RGO nanosheets. The diameter of the CoP particle decreases to about 6–8 nm. Sodium ion battery anodes based on the CoP/RGO nanohybrids display significantly improved sodium ion storage performance. These electrode materials demonstrate a large capacity of about 490 mA h g–1, at a current density of 100 mA g–1, after 100 cycles. They also deliver good rate performance, demonstrating about 381 mA h g–1 specific capacity when the current density reaches 2.0 A g–1. The ultrafine nanoparticles, interconnected porous structure, large surface area, and good electrical conductivity are the major reasons for the excellent electrochemical performance. The synthesis method presented here is general, easy, and efficient, and can be developed for other metal phosphide–graphene composites.

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Section: Methodsmentioning

confidence: 99%

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Dong

Zhang

et al. 2018

Eur J Inorg Chem

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“…Nitrogen adsorption analysis of the calcined catalyst was carried out to measure the porous structure. As can be seen from Figure A, the adsorption‐desorption isotherms of both samples demonstrate the typical type IV isotherm with H1 hysteresis loop, which is a typical characteristic of the ordered mesoporous material . The hysteresis loop is in the P/P 0 range of 0.68–0.96; however, that of 1T−N/OMA and 3T−N/OMA catalysts shift to the low pressure regions, and the slopes of the their adsorption and desorption branches of the hysteresis loop are relatively gentle, due to the addition of the structural modifier‐TMB, which can be clearly confirmed in Figure B.…”

Section: Resultsmentioning

confidence: 79%

“…Therefore, in order to ensure the high activity of the catalyst and the long‐range ordered mesoporous structure, 1T‐10 N/OMA and 1T‐20 N/OMA are not studied in the following work. Meanwhile, Figure d demonstrates the HRTEM image of the reduced 1T−N/OMA catalyst, lattice spacing of Ni about 0.21 nm belonging to (111) crystal plane, which is closely related to the active sites for the CO 2 methanation reaction. SEM elemental mapping of the selected 1T−N/OMA sample is demonstrated in Figure e and f. The maps of Al and Ni demonstrate the actual distributions of these elements separately, which confirms that all elements are homogeneously dispersed across the whole catalyst.…”

Section: Resultsmentioning

confidence: 85%

“…Previous studies discovered that transition metals such as Ru, Ni and Fe are active species for CO 2 methanation reaction. Among them, Ni‐based catalysts have been widely used because of their low cost and relatively high catalytic activity . However, this reaction is highly exothermic reaction, which can lead to Ni sintering and carbon formation and even deactivation of the catalyst at high temperatures .…”

Section: Introductionmentioning

confidence: 99%

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Organic Additive Assisted Ordered Mesoporous Ni/Al₂O₃ Catalyst for CO₂ Methanation

et al. 2020

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A trimethylbenzene (TMB) assisted ordered mesoporous Ni/ Al 2 O 3 catalysts were prepared by a one-pot evaporationinduced self-assembly (EISA) method for CO 2 methanation to solve the problems of high-temperature sintering of Ni particle and poor low-temperature activity of Ni-based catalysts. For comparison, we also prepared the catalysts without TMB or with different amount of NiO loadings. These samples were characterized by nitrogen adsorption, X-ray diffraction, H 2 temperature programmed reduction, scanning electron microscopy and transmission electron microscopy. The structure of the ordered mesoporous Ni/Al 2 O 3 catalyst was modified by TMB to obtain a high specific surface area and a smaller pore size, resulting in the smaller Ni particles size and the higher metal dispersion. These changes could increase the interaction between the Ni species and the support, which effectively solved the problem of high temperature Ni sintering and low temperature activity. The mesoporous TMB-assisted ordered mesoporous Ni/Al 2 O 3 catalysts catalyst reached the maximum CO 2 conversion and CH 4 yield of 74.61 and 88.27 %, respectively at 425°C, 0.1 MPa and a weight hourly space velocity of 60,000 mL g À 1 h À 1 . In addition, the catalyst showed excellent stability in 100 h-lifetime test at high space velocity owing to the confinement of the ordered mesoporous structure as well as the modification of catalyst structure by TMB.

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“…Great efforts have been made to improve Ni/Al 2 O 3 catalysts, such as the application of various preparation methods or the modification of Al 2 O 3 support . Zhao et al prepared Ni/Al 2 O 3 catalysts by a solution combustion method for syngas methanation and found that Ni particles were scattered and spatially isolated by Al 2 O 3 , which could prevent the sintering of Ni particles at high temperatures .…”

Section: Introductionmentioning

confidence: 99%

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Zhang

Liu

2019

Energy Tech

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To simultaneously inhibit Ni sintering and coke formation, while maintaining high catalytic activity, Ni–La2O3/Al2O3 catalysts are prepared by a modified deposition–precipitation (DP) method and applied for the CO methanation reaction. The activity of the catalyst prepared by the DP method is much higher than those prepared by the traditional impregnation and co‐impregnation methods due to the promotion of La2O3 as well as its unique dispersion on the surface of the catalyst. In the 100 h‐lifetime test under the conditions of 450 °C, 0.1 MPa, a weight hourly space velocity (WHSV) of 120 000 mL g−1 h−1, the Ni–La2O3/Al2O3 catalyst prepared by the DP method shows high catalytic stability. The characterization results show that La2O3 species can be deposited on the surface of the catalyst during the preparation process and can act as a physical barrier to prevent sintering of Ni particles and coke formation during high‐temperature reduction and reaction. La2O3 species can improve the reducibility of Ni particles and decrease the Ni particle sizes, resulting in larger H2 uptake and higher catalytic activity. Furthermore, the La3+/La2+ redox can also decrease coke formation by increasing the active oxygen species on the Ni surface.

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CO2 methanation over ordered mesoporous NiRu-doped CaO-Al2O3 nanocomposites with enhanced catalytic performance

Cited by 91 publications

References 73 publications

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Organic Additive Assisted Ordered Mesoporous Ni/Al₂O₃ Catalyst for CO₂ Methanation

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

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CO2 methanation over ordered mesoporous NiRu-doped CaO-Al2O3 nanocomposites with enhanced catalytic performance

Cited by 91 publications

References 73 publications

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Ultrafine CoP Nanoparticles Anchored on Reduced Graphene Oxide Nanosheets as Anodes for Sodium Ion Batteries with Enhanced Electrochemical Performance

Organic Additive Assisted Ordered Mesoporous Ni/Al2O3 Catalyst for CO2 Methanation

La2O3‐Promoted Ni/Al2O3 Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

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Product

Resources

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Organic Additive Assisted Ordered Mesoporous Ni/Al₂O₃ Catalyst for CO₂ Methanation

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability