Green synthesis of transition metal nanocrystals encapsulated into nitrogen-doped carbon nanotubes for efficient carbon dioxide capture

Ghosh, Sreetama; Ramaprabhu, Sundara

doi:10.1016/j.carbon.2018.09.083

Cited by 54 publications

(32 citation statements)

References 47 publications

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“…Further, the carbon nanotubes were achieved as a proper adsorbent for CO 2 uptake (Abuilaiwi et al 2010;Srivastava and et al 2003). Recently, Ghosh and Ramaprabhu (2019) have studied transition metal (iron, cobalt and nickel) salt-encapsulated nitrogen-doped bamboo-like carbon nanotubes for CO 2 uptake across a broad range of temperature and pressure (Fig. 12).…”

Section: Carbonaceous Materials Adsorbentsmentioning

confidence: 99%

Recent advances in carbon capture storage and utilisation technologies: a review

et al. 2020

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Human activities have led to a massive increase in $$\hbox {CO}_{2}$$ CO 2 emissions as a primary greenhouse gas that is contributing to climate change with higher than $$1\,^{\circ }\hbox {C}$$ 1 ∘ C global warming than that of the pre-industrial level. We evaluate the three major technologies that are utilised for carbon capture: pre-combustion, post-combustion and oxyfuel combustion. We review the advances in carbon capture, storage and utilisation. We compare carbon uptake technologies with techniques of carbon dioxide separation. Monoethanolamine is the most common carbon sorbent; yet it requires a high regeneration energy of 3.5 GJ per tonne of $$\hbox {CO}_{2}$$ CO 2 . Alternatively, recent advances in sorbent technology reveal novel solvents such as a modulated amine blend with lower regeneration energy of 2.17 GJ per tonne of $$\hbox {CO}_{2}$$ CO 2 . Graphene-type materials show $$\hbox {CO}_{2}$$ CO 2 adsorption capacity of 0.07 mol/g, which is 10 times higher than that of specific types of activated carbon, zeolites and metal–organic frameworks. $$\hbox {CO}_{2}$$ CO 2 geosequestration provides an efficient and long-term strategy for storing the captured $$\hbox {CO}_{2}$$ CO 2 in geological formations with a global storage capacity factor at a Gt-scale within operational timescales. Regarding the utilisation route, currently, the gross global utilisation of $$\hbox {CO}_{2}$$ CO 2 is lower than 200 million tonnes per year, which is roughly negligible compared with the extent of global anthropogenic $$\hbox {CO}_{2}$$ CO 2 emissions, which is higher than 32,000 million tonnes per year. Herein, we review different $$\hbox {CO}_{2}$$ CO 2 utilisation methods such as direct routes, i.e. beverage carbonation, food packaging and oil recovery, chemical industries and fuels. Moreover, we investigated additional $$\hbox {CO}_{2}$$ CO 2 utilisation for base-load power generation, seasonal energy storage, and district cooling and cryogenic direct air $$\hbox {CO}_{2}$$ CO 2 capture using geothermal energy. Through bibliometric mapping, we identified the research gap in the literature within this field which requires future investigations, for instance, designing new and stable ionic liquids, pore size and selectivity of metal–organic frameworks and enhancing the adsorption capacity of novel solvents. Moreover, areas such as techno-economic evaluation of novel solvents, process design and dynamic simulation require further effort as well as research and development before pilot- and commercial-scale trials.

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Section: Carbonaceous Materials Adsorbentsmentioning

confidence: 99%

Recent advances in carbon capture storage and utilisation technologies: a review

et al. 2020

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“…The latter represents the formation of N-doped graphitic layers with (002) planes. [38] Consequently, the thick NC layer contains more than ten graphitic layers, and thus the electronic effect from Fe 5 C 2 to outer NC layer should be very feeble as compared to the reported case that single-shell carbon encapsulated iron particle. [39] Powder X-ray diffraction (XRD) of NC@Fe displays two diffraction peaks at 2θ values of 43.3°and 44.1°, assigning to (021) and (510) planes of Fe 2 C 5 (JCPDS no.…”

Section: Resultsmentioning

confidence: 92%

“…The lattice distance of the nanoparticle of Fe compound is 0.21 nm, and the lattice distance of NC layer is 0.34 nm. The latter represents the formation of N‐doped graphitic layers with (002) planes . Consequently, the thick NC layer contains more than ten graphitic layers, and thus the electronic effect from Fe 5 C 2 to outer NC layer should be very feeble as compared to the reported case that single‐shell carbon encapsulated iron particle .…”

Section: Resultsmentioning

confidence: 97%

Metal‐Modulated Nitrogen‐Doped Carbon Electrocatalyst for Efficient Carbon Dioxide Reduction

et al. 2020

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Carbon‐based catalysts have been increasingly studied for electrochemical CO2 reduction, and their design is mainly focused on modulation of heteroatom dopants, of which chemical states rely highly on the synthesis approach and precursor used. In this work, we present a nitrogen‐doped carbon (NC) catalyst with modulation of N assembled states by Fe particles. The synthetic NC@Fe electrocatalyst enabled efficient and durable CO2 reduction at the maximum CO Faradaic efficiency of 90.6 % and 93 % reservation of its initial activity after long‐term electrolysis. Studies from experiments and DFT calculations indicated that Fe particles induced formation of N‐doped carbon layers in NC@Fe electrocatalyst. These N‐doped carbon layers provide more N‐assembled domains on the surface, in which the triple graphitic N, triple pyridinic N and graphitic‐pyrrolic N configurations were revealed to reduce the formation energy of key intermediates *COOH and *CO for efficient CO2‐to‐CO conversion. These results are hoped to motivate more research on modulation over chemical states of heteroatoms toward synthesis of efficient carbon‐based catalysts for electrocatalytic applications.

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“…The dried sample was annealed at 800 °C for 3 h in a nitrogen atmosphere at a heating rate of 5 °C min –1 . The synthesis procedure has been explained in detail in our previous work . Thus, nitrogen-doped and iron carbide-encapsulating carbon nanotubes were synthesized (Fe 3 C@NCNTs).…”

Section: Methodsmentioning

confidence: 99%

Nonprecious Catalyst for Three-Phase Contact in a Proton Exchange Membrane CO₂ Conversion Full Cell for Efficient Electrochemical Reduction of Carbon Dioxide

Ghosh

Garapati

Ghosh

2019

ACS Appl. Mater. Interfaces

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Development of a cost-effective and highly efficient electrocatalyst is essential but challenging in order to convert carbon dioxide to value-added chemicals at ambient conditions. In the current work, the activity of a full electrochemical cell has been demonstrated, utilizing a proton exchange membrane CO 2 conversion cell that can selectively convert carbon dioxide to a value-added chemical (formic acid) at room temperature and pressure. A cost-effective, nonprecious-metal-based electrocatalyst, nitrogen-doped carbon nanotubes encapsulating Fe 3 C nanoparticles (Fe 3 C@ NCNTs), has been reported to exhibit superior catalytic activity toward the electrochemical CO 2 reduction reaction (CO 2 RR). A facile one-step synthesis procedure has been undertaken to synthesize Fe 3 C@NCNTs. CO 2 adsorption takes place via sharing of charge between the nucleophilic anchoring site (Fe 3 C) and the electrophilic C site of CO 2 , as shown by the DFT studies. The porous architecture, unique tubular structure, high graphitization degree, and appropriate doping of the Fe 3 C-encapsulating NCNTs allow better three-phase contact of CO 2 (gas), H 2 O (liquid), and catalyst (solid), which can enhance the electrocatalytic activity of the cell, as demonstrated by the experimental findings. The cell was tested under a continuous flow of CO 2 gas and has been demonstrated to produce a good amount of formic acid (HCOOH). The production of formic acid was examined by utilizing UV−vis spectroscopy and high-performance liquid chromatography (HPLC). A series of designed experiments disclosed that the maximum yield of formic acid was as high as 90% with Fe 3 C@NCNTs as both anode and cathode catalysts. Technology to scale up the reduction procedure has also been proposed and shown in this particular work. These unique observations open a route for the development of cost-effective and highly active platinum-free electrocatalysts for the CO 2 RR.

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Green synthesis of transition metal nanocrystals encapsulated into nitrogen-doped carbon nanotubes for efficient carbon dioxide capture

Cited by 54 publications

References 47 publications

Recent advances in carbon capture storage and utilisation technologies: a review

Recent advances in carbon capture storage and utilisation technologies: a review

Metal‐Modulated Nitrogen‐Doped Carbon Electrocatalyst for Efficient Carbon Dioxide Reduction

Nonprecious Catalyst for Three-Phase Contact in a Proton Exchange Membrane CO₂ Conversion Full Cell for Efficient Electrochemical Reduction of Carbon Dioxide

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Green synthesis of transition metal nanocrystals encapsulated into nitrogen-doped carbon nanotubes for efficient carbon dioxide capture

Cited by 54 publications

References 47 publications

Recent advances in carbon capture storage and utilisation technologies: a review

Recent advances in carbon capture storage and utilisation technologies: a review

Metal‐Modulated Nitrogen‐Doped Carbon Electrocatalyst for Efficient Carbon Dioxide Reduction

Nonprecious Catalyst for Three-Phase Contact in a Proton Exchange Membrane CO2 Conversion Full Cell for Efficient Electrochemical Reduction of Carbon Dioxide

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Product

Resources

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Nonprecious Catalyst for Three-Phase Contact in a Proton Exchange Membrane CO₂ Conversion Full Cell for Efficient Electrochemical Reduction of Carbon Dioxide