Modulating CO2 methanation activity on Ni/CeO2 catalysts by tuning ceria facet-induced metal-support interaction

Lin, Shuangxi; Tang, Rui; Liu, Xudong; Gong, Longchen; Li, Zhenhua

doi:10.1016/j.ijhydene.2023.10.095

Cited by 14 publications

(1 citation statement)

References 57 publications

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“…As shown in Figure b, the peaks at 3710 and 3658 cm –1 were assigned to the vibration modes of *OH in bicarbonates. Peaks at 3230 and 3400 cm –1 were ascribed to *OH, contributing to the dissociation of b-HCOO*, explaining the observed peaks of bidentate formates (2944–2815 and 1050 cm –1 ). − The vibration peaks in the range of 2300–2400 cm –1 were assigned to gaseous *CO 2 , while that at 2137 cm –1 was attributed to CO. The peak at 1776 cm –1 was ascribed to *HOCO, suggesting that hydrogen adsorbed on the Fe surface reacted with CO 2 to form *HOCO, which further reacted with another H atom to form *CO and H 2 O.…”

Section: Resultsmentioning

confidence: 94%

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Gao,

Yuan,

Yang

et al. 2024

ACS Sustainable Chem. Eng.

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The urgent need to address global warming has led researchers to investigate various methods for capturing and utilizing CO 2 . One promising approach is the integration of calcium looping (CaL) and reverse water−gas shift (RWGS) reactions. Therefore, dual functional materials enriched with CaZrO 3 were introduced as effective catalysts, exhibiting a sustainable catalytic CO 2 conversion to 100% CO selectivity and a remarkable CO 2 adsorption capacity (16.69 mmol g DFM −1 ), CO yield (9.64 mmol g DFM −1), even under low hydrogen concentration (15% H 2 ) in CaL and RWGS processes. Surface chemistry analysis revealed that oxygen vacancies, acting adsorption sites, and lattice oxygen of CaZrO 3 can be activated by hydrogen. This activation, linked to the formation of strong basic sites with Zr 4+ -O 2− , significantly enhanced CO 2 conversion efficiency. The synergistic promotion mechanism was validated through in situ X-ray diffraction, DRIFTS, and Raman spectroscopy techniques. The bidentate formate mechanism was predominant, indicating that bicarbonates and hydroxyl synergistic promote CO 2 conversion in the high-temperature CaL−RWGS process. 10FCZ−5 showed good long-time stability, and the material maintained a high dispersion of Fe species after 10 cycles, demonstrating excellent absorbent capacity (11 mmol g DFM −1) and CO yield (6.2 mmol g DFM −1 ).

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Section: Resultsmentioning

confidence: 94%

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Gao,

Yuan,

Yang

et al. 2024

ACS Sustainable Chem. Eng.

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Auto‐Pressurized Multi‐Stage Tesla‐Valve Type Microreactors in Carbon Monoliths Obtained Through 3D Printing: Impact of Design on Fluid Dynamics and Catalytic Activity

Parra‐Marfil,

Aguilar‐Madera,

Pérez‐Cadenas

et al. 2024

Adv Funct Materials

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The present research exploits an innovative methodology for producing auto‐pressurized carbon microreactors with a precise and controlled structure analyzing the influence of their design on the fluid dynamics and their catalytic performance. Carbon monoliths with Tesla‐valve shape channels (Tesla, T, and modified Tesla, Tm) are synthesized through the combination of 3D printing and sol–gel process and further probed as Ni/CeO2 supports on CO2 methanation. The experimental results and mathematical modeling corroborated the improved performance obtained through the complex design compared to a conventional one. In addition to chaotic fluid flow induced by the deviation in flow direction, which improves the reagents‐active phase interaction, local pressure increases due to convergence of flows may enhance the Sabatier reaction according to Le Châtelier's principle. Conversely to straight channels, T and Tm are not affected by flow rate and presented chemical control. Tesla‐valve with curved angle (Tm) improved the mass transfer, achieving higher conversion and ≈30% reaction rate increase regarding right angle (T). Thus, this auto‐pressurized multi‐stage Tesla‐valve monolith opens the gate to design specific and advanced functional materials for multitude chemical reactions where not only the reactant‐active phase contact can be maximized but also the reaction conditions can be controlled to maximize the reaction kinetics.

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Tailoring metal-support interactions via spatial confinement of Ni/CeO2 interfaces on h-BN for efficient CO2 methanation

Lin,

Gong,

Zhao

et al. 2024

Chemical Engineering Journal

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Modulating CO2 methanation activity on Ni/CeO2 catalysts by tuning ceria facet-induced metal-support interaction

Cited by 14 publications

References 57 publications

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Auto‐Pressurized Multi‐Stage Tesla‐Valve Type Microreactors in Carbon Monoliths Obtained Through 3D Printing: Impact of Design on Fluid Dynamics and Catalytic Activity

Tailoring metal-support interactions via spatial confinement of Ni/CeO2 interfaces on h-BN for efficient CO2 methanation

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Modulating CO2 methanation activity on Ni/CeO2 catalysts by tuning ceria facet-induced metal-support interaction

Cited by 14 publications

References 57 publications

In Situ Capture and Conversion of CO2 to CO Using CaZrO3 Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO2 to CO Using CaZrO3 Promoted Fe–CaO Dual-Functional Material

Auto‐Pressurized Multi‐Stage Tesla‐Valve Type Microreactors in Carbon Monoliths Obtained Through 3D Printing: Impact of Design on Fluid Dynamics and Catalytic Activity

Tailoring metal-support interactions via spatial confinement of Ni/CeO2 interfaces on h-BN for efficient CO2 methanation

Contact Info

Product

Resources

About

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material