Synthesis and characterization of nickel catalysts supported on different carbon materials

Sápi, András; Rémiás, Róbert; Kukovecz, Ákos; Kordás, Krisztián; Kiricsi, Imre

doi:10.1007/s11144-009-5527-3

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…3) show the structural differences between different supports. Similar to that reported earlier, 17 the support had a great effect on the particle size. The catalysts on graphite were found to be larger, and had a broader size distribution than on CNTs.…”

Section: Resultssupporting

confidence: 89%

“…Furthermore, carbon nanotubes are rather inert in chemical reactions and can be easily grown on templates to form scaffolds and hierarchical structures with engineered pore systems. 11,16,17 Carbonaceous supports, however, are more sensitive to heat than metal oxides and may face deactivation due to catalytic oxidation and gasication at relatively low temperatures. 18 The aim of this work is to study and explain the differences in the activity and stability of commonly used Pt, Pd and Ni catalyst metals supported on different carbon based materials in the steam reforming of ethanol at low to moderate temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

et al. 2015

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Three different metals (Pt, Pd and Ni) on multi-walled carbon nanotube and graphite supports were tested as catalysts in ethanol reforming experiments at low temperatures. The carbon nanotube based catalysts outperformed their counterparts supported on graphite in both ethanol conversion and hydrogen evolution. The palladium catalyst in both supports was rather inactive, whereas the nickel/nickel oxide catalyst showed excellent performance. The most active catalyst (Ni/CNT) showed ethanol conversion and hydrogen evolution already at 200 C with complete conversion at 450 C. The measured selectivity for H 2 production was $42% with almost 100% conversion.Analysis of the spent catalyst samples revealed a considerable increase in carbon concentration caused by the formation of soot and coke on each sample but also carbon nanofibers and nanotubes were found to grow on the catalyst nanoparticles in the course of the steam reforming reactions.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

et al. 2015

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“…Nickel alongwith other metals is considered to be a useful catalyst (5). Different carbon supports for the synthesis of nickel catalyst have been studied (6). Large scale production of carbon nanfibers by catalytic chemical vapour deposition(CCVD)of ethane over carbon nanotubes supported nickel catalyst (7 ) and for production of nanotubes (8 ) have been reported.It has also been used for the production of nanofibers and hydrogen (9).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Carbon Supported Nano-Nickel and its Sorption Behavior for Zinc from Aqueous Solutions

Asim

Ahmed

Ansari

2012

KEM

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Nickel deposited on carbon has been used as adsorbent to recover Zn (II) from aqueous system. The adsorbent was synthesized by depositing nickel nitrate on carbon under inert conditions and decomposing it to nickel by raising the temperature, washing and vacuum drying. Various techniques including XRD, FTIR, and SEM were employed for its characterization. FTIR showed that the nickel deposition enhanced the carbon functionalization due to presence of OH, C=O and C-O groups.Average crystallite size ofabout 9 nm was determined from XRD. Nickel deposition resulted in further division particles as indicated from the morphological study. Zn (II) was subjected to adsorptionon the synthesized adsorbent. It was observed that the rate of adsorption increased significantly on the nickel deposited carbon than the carbon alone. Morris-Weber, Lagergren and Reichenberg models were applied to find out the type and rate of adsorption employingfirst and second order rate equations.The adsorption data were applied toLangmuir, Freundlich and D-R isotherms and values of isotherm constants were calculated and were higher for Ni/C than carbon alone. The mean free energy of zinc sorption on carbon and Ni/C are 16.67 and 18.26 kJmol-1 which shows chemisorption. Thermodynamic studies were done to find out the effect of temperature on sorption. Positive values of ΔH and negative values of ΔG show endothermic and spontaneous type of sorption.

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Effects of carbon nanotube functionalization on the agglomeration and sintering of supported Pd nanoparticles

Puskás

Kukovecz

2013

Adsorption

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Synthesis and characterization of nickel catalysts supported on different carbon materials

Cited by 14 publications

References 20 publications

Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

Preparation and Characterization of Carbon Supported Nano-Nickel and its Sorption Behavior for Zinc from Aqueous Solutions

Effects of carbon nanotube functionalization on the agglomeration and sintering of supported Pd nanoparticles

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