Cellulose assisted combustion synthesis of porous Cu–Ni nanopowders

Ashok, Anchu; Kumar, Anand; Bhosale, Rahul R.; Saleh, Mohd Ali H.; Broeke, L.J.P. van den

doi:10.1039/c5ra03103f

Cited by 66 publications

(54 citation statements)

References 38 publications

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“…H 2 is considered as one of the most promising future energy sources as it is characterized by a very high energy density (143 MJ/kg) and environmentally clean utilization. H 2 can be produced by gasification and reforming of fossil fuels [1][2][3], pyrolysis and reforming of biomass [4][5][6][7], ethanol and methanol decomposition [8][9][10][11], and so forth. Literature survey indicates that, in recent years, the researchers are attracted more towards production of H 2 from water by using solar energy as the heat source.…”

Section: Introductionmentioning

confidence: 99%

Solar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions

Bhosale

Kumar

Almomani

2016

International Journal of Photoenergy

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The computational thermodynamic modeling of the terbium oxide based two-step solar thermochemical water splitting (Tb-WS) cycle is reported. The 1st step of the Tb-WS cycle involves thermal reduction of TbO2into Tb and O2, whereas the 2nd step corresponds to the production of H2through Tb oxidation by water splitting reaction. Equilibrium compositions associated with the thermal reduction and water splitting steps were determined via HSC simulations. Influence of oxygen partial pressure in the inert gas on thermal reduction of TbO2and effect of water splitting temperature (TL) on Gibbs free energy related to the H2production step were examined in detail. The cycle (ηcycle) and solar-to-fuel energy conversion (ηsolar-to-fuel) efficiency of the Tb-WS cycle were determined by performing the second-law thermodynamic analysis. Results obtained indicate thatηcycleandηsolar-to-fuelincrease with the decrease in oxygen partial pressure in the inert flushing gas and thermal reduction temperature (TH). It was also realized that the recuperation of the heat released by the water splitting reactor and quench unit further enhances the solar reactor efficiency. AtTH=2280 K, by applying 60% heat recuperation, maximumηcycleof 39.0% andηsolar-to-fuelof 47.1% for the Tb-WS cycle can be attained.

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Section: Introductionmentioning

confidence: 99%

Solar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions

Bhosale

Kumar

Almomani

2016

International Journal of Photoenergy

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“…A well-defined step in the temperature range of 150°C to 400°C in the second phase (P2) with a weight loss of 24 % can be correlated to the decomposition of remaining nitrate species and hydroxyl ions (Ruan et al 2016). As can be seen in P2 region, the main curve is believed due to combustion reaction of metal nitrate (in this case is Zn nitrate) and glycine while the latter curve could be due to the partial reduction of metal oxides to metal (Ashok et al 2015). Meanwhile, a weight loss of 17 % recorded at the third phase (P3) in the temperature region of 500°C to 700°C is related to the decomposition of carbon residue which formed as intermediate compounds during the combustion reaction (Matheswaran et al 2017).…”

Section: Discussionmentioning

confidence: 89%

Synthesis and Characterization of Zn-doped LiCoO2 Material Prepared via Glycinenitrate Combustion Method for Proton Conducting Solid Oxide Fuel Cell Application

Somalu¹,

Yusof²,

Osman³

et al. 2018

JKUKM

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LiCo 2-based materials are well-known, widely used as cathode materials in lithium ion batteries and currently are also used in low temperature proton conducting solid oxide fuel cells (H +-SOFCs) application. Dopants such as Zn are introduced in LiCo 2-based materials to improve the properties and performance of the materials for H +-SOF Capplication. In this study, Zn-doped LiCo 2 , LiCo 0.6 Zn 0.4 O 2 (LCZO) powder was synthesized via glycine-nitrate combustion method followed by various characterizations. The precursor LCZO powder dried at 100°C was subjected to thermogravimetric analysis (TGA). The phase formation and morphology of the calcined LCZO powder at 600°C were examined by an X-ray diffractometer (XRD) and a tabletop scanning electron microscope (SEM), respectively. The TGA result revealed that the thermal decomposition of the intermediate compounds in the precursor LCZO powder was completed at 800°C through three main phases of weight losses. A pure phase of LCZO was not completely produced after the calcination at 600°C due to the presence of secondary phases as confirmed from the XRD analysis. The identified secondary phases that present are confirmed as ZnCo 2 O 4 and ZnO as documented in JCPDS file no. 00-001-1149 and JCPDS file no. 01-079-0205 consecutively. The SEM images showed that the impure calcined LCZO powder possessed homogeneous and fine particles.

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“…Afterwards, the impregnated support is dried overnight at 105 • C under air to allow the water to evaporate. Finally, the dried catalyst is calcined at 500 • C (heating at 10 • C/min) for 4 h under air, converting the metal nitrates into their respective metal oxides [47,48]. The catalysts are denoted as PdNi-Ce-LDH-xxx where 'xxx' indicates the calcination temperature of the Ce-LDH support, prior to metal impregnation, as described in Section 2.1.1.…”

Section: Palladium Nickel Catalystsmentioning

confidence: 99%

Monometallic Cerium Layered Double Hydroxide Supported Pd-Ni Nanoparticles as High Performance Catalysts for Lignin Hydrogenolysis

et al. 2020

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Monometallic cerium layered double hydroxides (Ce-LDH) supports were successfully synthesized by a homogeneous alkalization route driven by hexamethylenetetramine (HMT). The formation of the Ce-LDH was confirmed and its structural and compositional properties studied by XRD, SEM, XPS, iodometric analyses and TGA. HT-XRD, N2-sorption and XRF analyses revealed that by increasing the calcination temperature from 200 to 800 °C, the Ce-LDH material transforms to ceria (CeO2) in four distinct phases, i.e., the loss of intramolecular water, dehydroxylation, removal of nitrate groups and removal of sulfate groups. When loaded with 2.5 wt% palladium (Pd) and 2.5 wt% nickel (Ni) and calcined at 500 °C, the PdNi-Ce-LDH-derived catalysts strongly outperform the PdNi-CeO2 benchmark catalyst in terms of conversion as well as selectivity for the hydrogenolysis of benzyl phenyl ether (BPE), a model compound for the α-O-4 ether linkage in lignin. The PdNi-Ce-LDH catalysts showed full selectivity towards phenol and toluene while the PdNi-CeO2 catalysts showed additional oxidation of toluene to benzoic acid. The highest BPE conversion was observed with the PdNi-Ce-LDH catalyst calcined at 600 °C, which could be related to an optimum in morphological and compositional characteristics of the support.

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Cellulose assisted combustion synthesis of porous Cu–Ni nanopowders

Abstract: Cu–Ni nanoparticles were synthesized using cellulose assisted combustion synthesis method. The BET area, pore volume and pore size of these nanoparticles were higher than nanoparticles synthesized by solution combustion synthesis (SCS) method.

Cited by 66 publications

References 38 publications

Solar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions

Solar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions

Synthesis and Characterization of Zn-doped LiCoO2 Material Prepared via Glycinenitrate Combustion Method for Proton Conducting Solid Oxide Fuel Cell Application

Monometallic Cerium Layered Double Hydroxide Supported Pd-Ni Nanoparticles as High Performance Catalysts for Lignin Hydrogenolysis

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