Developmental trends in CO<sub>2</sub> methanation using various catalysts

Sreedhar, I.; Varun, Yaddanapudi; Singh, Satyapaul A.; Venugopal, A.; Reddy, Benjaram M.

doi:10.1039/c9cy01234f

Cited by 102 publications

(65 citation statements)

References 188 publications

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“…These are the hydrogenation reactions to methane and methanol and the reduction of carbon dioxide to carbon monoxide. Production of methane (the Sabatier reaction 10 ) directly produces the main component of natural gas. Methanol has a low cetane number which limits its use as a fuel, but it can be dehydrated to dimethyl ether which has a higher cetane number and which is a potential replacement for diesel oil.…”

Section: Carbon Dioxide Generation and Utilisationmentioning

confidence: 99%

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

2021

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Section: Carbon Dioxide Generation and Utilisationmentioning

confidence: 99%

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

2021

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“…Since some sodium was detected on the TiO 2 * support and that promoter effects of alkali metal cations on the CO 2 reduction have been reported, [ 80 ] we also investigated the doping of the CNT ox‐400 ‐supported catalysts with sodium. Ni SA ‐Na/CNT ox‐400 and Ru SA ‐Na/CNT ox‐400 were produced by NaOH doping (1:2 metal/Na) to evaluate the effect of Na addition.…”

Section: Resultsmentioning

confidence: 99%

Stabilization of Metal Single Atoms on Carbon and TiO₂ Supports for CO₂ Hydrogenation: The Importance of Regulating Charge Transfer

Rivera‐Cárcamo

Scarfiello

Garcı́a

et al. 2020

Adv Materials Inter

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Supported single atoms constitute excellent models for understanding heterogenous catalysis and have achieved breakthroughs during the past years. How to prevent the aggregation and modulate activity of these species via metal‐support interaction should be considered for practical applications. This work presents simple methods involving the creation of carbon‐ (on carbon nanotube (CNT)) or oxygen‐vacancies (on TiO2) to stabilize nickel and ruthenium single atoms. The defective supports and the resulting catalysts are characterized by a large variety of techniques. These analyses show that this strategy is efficient for the preparation of ultra‐dispersed catalysts. Comparison of the catalytic performances of these catalysts for the CO2 hydrogenation reaction is also reported. Catalysts supported on TiO2 are more active and sometimes more stable than those deposited on CNT. Nickel catalysts are very selective for the production of CO, and ruthenium catalysts are more selective for the production of methane. Most importantly, it is shown that, in the case of Ru, a direct correlation exists between the electronic density on the metal and the selectivity; electron‐rich species produce selectively methane, while electron‐deficient species orientate the selectivity toward CO. This work may figure a new way for the synthesis of ultra‐dispersed catalysts for various applications.

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“…36,37 In addition, the exothermic CO 2 methanation reaction (CO 2 + 4H 2 → CH 4 + 2H 2 O, DH = -165.0 kJ mol -1 ), also known as the Sabatier reaction, has attracted new interest because of the recent development of the power-to-gas concept. 38,39 This reaction is also recognized as an important approach to powering long-term space exploration missions. 40 In the present work, catalytic performance was evaluated based on monitoring the progress of atmospheric pressure CO 2 hydrogenation at temperatures from 300 to 400 ºC, with CO and CH 4 as the major products (Figure 4A).…”

Section: Catalytic Co 2 Hydrogenationmentioning

confidence: 99%

Hydrogen Spillover-Driven Low Temperature Synthesis of High-Entropy Alloy Nanoparticles as a Robust Catalyst

Mori

Hashimoto

Kamiuchi

et al. 2021

Preprint

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High-entropy alloys (HEAs) have been intensively pursued as potentially advanced materials because of their exceptional properties. However, the facile fabrication of nanometer-sized HEAs over conventional catalyst supports remains challenging, and the design of rational synthetic protocols would permit the development of innovative catalysts with a wide range of potential compositions. Herein, we demonstrate that titanium dioxide (TiO2) is a promising platform for the low-temperature synthesis of supported CoNiCuRuPd HEA nanoparticles (NPs) at 400°C. This process is driven by the pronounced hydrogen spillover effect on TiO2 in conjunction with coupled proton/electron transfer. In this process, Pd nuclei generated in the early stage act as uptake sites to enhance the migration of active hydrogen atoms, and the five component metals are simultaneously reduced by spilled hydrogen on the support rather than via direct reduction by gaseous H2. The CoNiCuRuPd HEA NPs on TiO2 produced in this work were found to be both active and extremely durable during the CO2 hydrogenation reaction. Characterization by means of various in situ techniques and theoretical calculations elucidated the specific mechanism by which the HEA NPs were formed and also established that a synergistic effect was obtained from this combination of elements.

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Developmental trends in CO₂ methanation using various catalysts

Abstract: Co2 methanation-two edged sword to counter global warming and energy crisis.

Cited by 102 publications

References 188 publications

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

Stabilization of Metal Single Atoms on Carbon and TiO₂ Supports for CO₂ Hydrogenation: The Importance of Regulating Charge Transfer

Hydrogen Spillover-Driven Low Temperature Synthesis of High-Entropy Alloy Nanoparticles as a Robust Catalyst

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Developmental trends in CO2 methanation using various catalysts

Abstract: Co2 methanation-two edged sword to counter global warming and energy crisis.

Cited by 102 publications

References 188 publications

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

Recent developments in organocatalysed transformations of epoxides and carbon dioxide into cyclic carbonates

Stabilization of Metal Single Atoms on Carbon and TiO2 Supports for CO2 Hydrogenation: The Importance of Regulating Charge Transfer

Hydrogen Spillover-Driven Low Temperature Synthesis of High-Entropy Alloy Nanoparticles as a Robust Catalyst

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Developmental trends in CO₂ methanation using various catalysts

Stabilization of Metal Single Atoms on Carbon and TiO₂ Supports for CO₂ Hydrogenation: The Importance of Regulating Charge Transfer