In situ synthesis of nickel carbide-promoted nickel/carbon nanofibers nanocomposite catalysts for catalytic applications

Kang, Jing; Han, Ruirui; Wang, Jia; Yang, Lan; Fan, Guoli; Feng, Li

doi:10.1016/j.cej.2015.04.024

Cited by 37 publications

(25 citation statements)

References 65 publications

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“…Carbon nanofibers (CNFs) have achieved a prominent relevance in the last decade due to their excellent mechanical properties, high electrical and thermal conductivities as well as mesoporosity, making them promising materials for an extensive range of applications such as energy storage [1][2][3][4], composites [5], catalysts [6,7] or adsorbents [8,9], among others. CNFs are graphitic fibers made of stacks of graphene layers aligned perpendicular, tilted or parallel to the fiber axis, thus resulting in different microstructures [10].…”

Section: Introductionmentioning

confidence: 99%

Graphitic nanomaterials from biogas-derived carbon nanofibers

Cuesta

Cameán

Ramos

et al. 2016

Fuel Processing Technology

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Carbon nanofibers with different microstructure and elemental composition that were produced in the catalytic decomposition of synthetic biogas mixtures, in a rotary-bed reactor using nickel and nickel-cobalt catalysts at 600 ºC and 700 ºC, were heat treated in the temperature interval 2600-2800 ºC to explore their ability to graphitize. The influence of treatment temperature as well as carbon nanofibers composition, particularly metallic species, on the structural and textural properties of the materials prepared is discussed. Graphitic nanomaterials with great development of the three-dimensional structure (d 002 ~ 0.3360 nm, L c ~ 48 nm, L a ~ > 100 nm) and low porosity (S BET ~ 20 m 2 g -1 ) have been achieved. Because of the catalytic effect of silicon in the presence of inherent nickel and cobalt metals, more structurally ordered materials were obtained from the carbon nanofibers by adding silica. Based on the results of this work, the utilization of biogasderived carbon nanofibers for the production of synthetic nanographite to be used in different applications, such as electrode material in energy storage devices in which both high degree of graphitic order and small surface area are required, appears feasible.

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Section: Introductionmentioning

confidence: 99%

Graphitic nanomaterials from biogas-derived carbon nanofibers

Cuesta

Cameán

Ramos

et al. 2016

Fuel Processing Technology

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“…The formation of carbon nanofibers and incorporated nickel carbidec ould only occura fter the initial reductiono fN i 2 + to Ni 0 by carbon containingp recursors. [82] In another carbon nanofiber growth study with nickel as the growth substrate, it was found that nickel can be present in three stages during the growth process:N i 3 Ca t5 73 K, composite formation of Ni-Ni 3 C 1Àx at 673-773 Ka nd Ni metal at 873 K. They also note that no stable nickel carbides can be formed, but that metastable species are often presenta tl ower temperatures( below 1373K). [83] Ni-W 2 Cs upported on activated carbon has been shown to be comparablya ctive to noble metal catalysts in hydrocracking of woody biomass to form ethylene glycol.…”

Section: Biomass Conversion and Catalysts For Related Processesmentioning

confidence: 98%

“…For the hydrogenation of chloronitrobenzene, NiC/Ni carbon nanofibers were able to convert 97–100 % of the starting material, whereas the Ni on carbon catalyst converted only 67 %. The formation of carbon nanofibers and incorporated nickel carbide could only occur after the initial reduction of Ni 2+ to Ni 0 by carbon containing precursors . In another carbon nanofiber growth study with nickel as the growth substrate, it was found that nickel can be present in three stages during the growth process: Ni 3 C at 573 K, composite formation of Ni‐Ni 3 C 1− x at 673–773 K and Ni metal at 873 K. They also note that no stable nickel carbides can be formed, but that metastable species are often present at lower temperatures (below 1373 K) .…”

Section: Mechanisms Of In Situ Carburizationmentioning

confidence: 99%

In Situ Formation of Metal Carbide Catalysts

et al. 2017

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Metal carbide catalysts are essential to many widely used chemical processes. Fischer‐Tropsch synthesis, methane dehydroaromatization and biomass conversion catalysts are typically prepared in situ from a metal oxide precursor with a carbon‐containing gas. The reduction process of the metal oxide affects the final catalyst, as does the carburization gas mixture and metal promoters. By looking at materials that are carburized in situ, new insights can be gained about catalyst activation, fuel processing, and deactivation stages. The main focuses of this Review are iron carbide, molybdenum carbide and nickel carbide; analyzing catalyst synthesis methods, reduction steps, in situ carburization and improvements to the native processes. By combining years of research on these catalysts, trends and similarities are observed that can be used to improve current catalytic studies.

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“…Furthermore, CCVD strategy was also employed to controllably assemble TiC/C/Si and NiC‐Ni/C nanofibres . Ti 6 Al 4 V foils, as metal seeds, were first used to grow TiC/C nanofibres by taking acetone as the carbon source, and then the silane was deposited on the surface of the TiC/C to form shell‐core TiC/C/Si nanofibres, according to the CCVD method (Figure d) .…”

Section: Controlled Synthesis and Its Structural Advantages In Energymentioning

confidence: 99%

“…TiC/C/Si nanofibres show about 3000 mAh g −1 of discharge capacity, with a capacity retention of 92 % after 100 cycles (Figure e). Similarly, by this CCVD method, nickel carbide‐promoted nickel/carbon nanofibres were directly generated by treating a carbonate‐containing NiAl precursor in a tube‐furnace reactor with C 2 H 2 as the carbon source …”

Section: Controlled Synthesis and Its Structural Advantages In Energymentioning

confidence: 99%

Transition Metal Carbide Complex Architectures for Energy‐Related Applications

Meng

Cao

2018

Chemistry A European J

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Transition metal carbides (TMCs), as a family of special interstitial alloys, exhibit novel intrinsic characteristics such as high melting point, high electronic conductivity, excellent mechanical and chemical stability, and good corrosion resistance, and hence have attracted ever-growing attention as promising electrode materials for energy-related applications. In this regard, we give a comprehensive overview of the structural design of transition metal carbide complex architectures and their structure advantages for energy-related applications. After a brief classification, we summarize in detail recent progress in controllable design and synthesis of TMCs with complex nanostructures (e.g., zero-, one-, two-, and three-dimensional, and self-supported electrodes) for electrochemical energy storage and conversion applications including metal-ion batteries, supercapacitors, rechargeable metal-air batteries, fuel cells, and water splitting. Finally, we end this review with some potential challenges and research prospects of TMCs as electrode materials for energy-related applications.

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In situ synthesis of nickel carbide-promoted nickel/carbon nanofibers nanocomposite catalysts for catalytic applications

Cited by 37 publications

References 65 publications

Graphitic nanomaterials from biogas-derived carbon nanofibers

Graphitic nanomaterials from biogas-derived carbon nanofibers

In Situ Formation of Metal Carbide Catalysts

Transition Metal Carbide Complex Architectures for Energy‐Related Applications

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