The Catalytic Performance of Ga2O3−CeO2 Composite Oxides over Reverse Water Gas Shift Reaction

Dai, Hui; Zhang, Anhang; Xiong, Siqi; Xiao, Xin; Zhou, Changjian; Pan, Yi

doi:10.1002/cctc.202200049

Cited by 15 publications

(9 citation statements)

References 39 publications

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“…The lower peak located at 534 °C is assigned to the chemisorption of H 2 and Ga 3+ species. The higher peak at 756 °C is attributed to the reduction of lattice oxygen of Ga 2 O 3 . , These findings support the notion that the selective cleavage of chemical bonds in intermediates is mainly influenced by the lattice oxygen mobility of catalysts.…”

Section: Resultssupporting

confidence: 81%

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

et al. 2023

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Restrained by the uncontrollable cleavage process of chemical bonds in methane molecules and corresponding formed intermediates, the target product in the reaction of methane selective oxidation to methanol would suffer from an inevitable overoxidation process, which is considered to be one of the most challenging issues in the field of catalysis. Herein, we report a conceptually different method for modulating the conversion pathway of methane through the selective cleavage of chemical bonds in the key intermediates to suppress the generation of peroxidation products. Taking metal oxides, typical semiconductors in the field of methane oxidation as model catalysts, we confirm that the cleavage of different chemical bonds in CH 3 O* intermediates could greatly affect the conversion pathway of methane, which has a vital role in product selectivity. Specifically, it is revealed that the formation of peroxidation products could be significantly prevented by the selective cleavage of C−O bonds in CH 3 O* intermediates instead of metal−O bonds, which is proved by the combination of density functional theory calculations and in situ infrared spectroscopy based on isotope labeling. By manipulating the lattice oxygen mobility of metal oxides, the electrons transferring from the surface to the CH 3 O* intermediates could directionally inject into the antibonding orbitals of the C−O bond, resulting in its selective cleavage. As a result, the gallium oxide with low lattice oxygen mobility shows a 3.8% conversion rate for methane with a high methanol generation rate (∼325.4 μmol g −1 h −1 ) and selectivity (∼87.0%) under room temperature and atmospheric pressure in the absence of extra oxidants, which is superior among the reported studies (reaction pressure: <20 bar).

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Section: Resultssupporting

confidence: 81%

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

et al. 2023

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“…In addition, virous rerio of Ga 2 O 3 /CeO 2 catalysts were designed for RWGS reaction by gel sol-gel method. [87] The solid solution phase and new active sites that Ga, Ce, O formed increase a number of oxygen vacancies, indicating high CO 2 hydrogenation ability (31 % CO 2 conversion and ~99 % CO selectivity under 500 °C, atmospheric pressure and a flow of reaction gas of CO 2 /H 2 = 1/3). Meanwhile, the mesoporous structure of GaÀ Ce composite oxides is more uniform and the pore volume is larger, which is more conducive to mass transfer in reaction.…”

Section: Other-based Catalystmentioning

confidence: 99%

Recent Advances in Hydrogenation of CO₂ to CO with Heterogeneous Catalysts Through the RWGS Reaction

Zhang,

Sun,

Wang

et al. 2024

Chemistry An Asian Journal

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With the continuous increase in CO2 emissions, primarily from the combustion of coal and oil, the ecosystem faces a significant threat. Therefore, as an effective method to minimize the issue, Reverse Water Gas Shift (RWGS) reaction which converts CO2 towards CO attracts much attention, is an environmentally‐friendly method to mitigate climate change and lessen dependence on fossil fuels. Nevertheless, the inherent thermodynamic stability and kinetic inertness of CO2 is a big challenge under mild conditions. In addition, it remains another fundamental challenge in RWGS reaction owing to CO selectivity issue caused by CO2 further hydrogenation towards CH4. Up till now, a series of catalysis systems have been developed for CO2 and H2 reduction reaction to produce CO. Herein, the research progress of the well‐performed heterogeneous catalysts for the RWGS reaction were summarized, including the catalyst design, catalytic performance and reaction mechanism. This review will provide insight into efficient utilization of CO2 and will promote the development of RWGS reaction.

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“…[34]. Copyright Elsevier, 2022), (b) Ga2O3−CeO2 (reprinted with permission from [9] Copyright Wiley, 2022), (c) Cu−CeO2 (reprinted with permission from [35]. Copyright American Chemical Society, 2022), and (d) Cu5In5−CeO2 (reprinted with permission from [35].…”

Section: Reaction Mechanism Of the Reverse Water-gas Conversion Reactionmentioning

confidence: 99%

“…In many CO 2 utilization technologies, CO 2 produces a variety of high−value basic chemicals through catalytic conversion, a process that has been widely studied by researchers. CO 2 catalytic conversion technology mainly includes thermal catalysis [6][7][8][9], photocatalysis [10,11], electrocatalysis [12,13], and so on. The research on CO 2 catalytic conversion mainly focuses on CO 2 catalytic hydrogenation.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Reverse Water–Gas Conversion Reaction

Zhou,

Zhang,

et al. 2023

Molecules

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The increase in carbon dioxide emissions has significantly impacted human society and the global environment. As carbon dioxide is the most abundant and cheap C1 resource, the conversion and utilization of carbon dioxide have received extensive attention from researchers. Among the many carbon dioxide conversion and utilization methods, the reverse water–gas conversion (RWGS) reaction is considered one of the most effective. This review discusses the research progress made in RWGS with various heterogeneous metal catalyst types, covering topics such as catalyst performance, thermodynamic analysis, kinetics and reaction mechanisms, and catalyst design and preparation, and suggests future research on RWGS heterogeneous catalysts.

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The Catalytic Performance of Ga₂O₃−CeO₂ Composite Oxides over Reverse Water Gas Shift Reaction

Cited by 15 publications

References 39 publications

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

Recent Advances in Hydrogenation of CO₂ to CO with Heterogeneous Catalysts Through the RWGS Reaction

Recent Advances in the Reverse Water–Gas Conversion Reaction

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The Catalytic Performance of Ga2O3−CeO2 Composite Oxides over Reverse Water Gas Shift Reaction

Cited by 15 publications

References 39 publications

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

Selective Cleavage of Chemical Bonds in Targeted Intermediates for Highly Selective Photooxidation of Methane to Methanol

Recent Advances in Hydrogenation of CO2 to CO with Heterogeneous Catalysts Through the RWGS Reaction

Recent Advances in the Reverse Water–Gas Conversion Reaction

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Product

Resources

About

The Catalytic Performance of Ga₂O₃−CeO₂ Composite Oxides over Reverse Water Gas Shift Reaction

Recent Advances in Hydrogenation of CO₂ to CO with Heterogeneous Catalysts Through the RWGS Reaction