The effect of the type of dopant (titanium and manganese) and of the reduced graphene oxide conte... more The effect of the type of dopant (titanium and manganese) and of the reduced graphene oxide content (rGO, 30 or 50 wt %) of the α-Fe2O3@rGO nanocomposites on their microstructural properties and electrochemical performance was investigated. Nanostructured composites were synthesized by a simple one-step solvothermal method and evaluated as anode materials for sodium ion batteries. The doping does not influence the crystalline phase and morphology of the iron oxide nanoparticles, but remarkably increases stability and Coulombic efficiency with respect to the anode based on the composite α-Fe2O3@rGO. For fixed rGO content, Ti-doping improves the rate capability at lower rates, whereas Mn-doping enhances the electrode stability at higher rates, retaining a specific capacity of 56 mAhg−1 at a rate of 2C. Nanocomposites with higher rGO content exhibit better electrochemical performance.
Transition metal oxides on reduced graphene oxide (TMO@rGO) nanocomposites were successfully prep... more Transition metal oxides on reduced graphene oxide (TMO@rGO) nanocomposites were successfully prepared via a very simple one-step solvothermal process, involving the simultaneous (thermal) reduction of graphene oxide to graphene and the deposition of TMO nanoparticles over its surface. Texture and morphology, microstructure, and chemical and surface compositions of the nanocomposites were investigated via scanning electron microscopy, X-ray diffraction, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results prove that Fe2O3@rGO, CoFe2O4@rGO, and CoO@rGO are obtained by using Fe and/or Co acetates as oxide precursors, with the TMO nanoparticles uniformly anchored onto the surface of graphene sheets. The electrochemical performance of the most promising nanocomposite was evaluated as anode material for sodium ion batteries. The preliminary results of galvanostatic cycling prove that Fe2O3@rGO nanocomposite exhibits better rate capability and stability...
Hematite/reduced graphene oxide (Fe2O3/rGO) nanocomposite was successfully fabricated via a facil... more Hematite/reduced graphene oxide (Fe2O3/rGO) nanocomposite was successfully fabricated via a facile solvothermal reaction of iron precursor solution and GO leading to simultaneous deposition of iron oxide nanoparticles and in situ reduction of GO without any reducing agent. Texture and morphology, microstructure, chemical and surface composition of the nanocomposite were investigated by scanning electron microscopy, Xray diffraction, Raman spectroscopy, thermo-gravimetric analysis and X-ray photoelectron spectroscopy, respectively. Its electrochemical performance as anode material for sodium ion batteries was preliminarily evaluated via galvanostatic cycling. The results prove that the Fe2O3 nanoparticles are uniformly anchored onto the surface of graphene nanosheets and that the Fe2O3/rGO nanocomposite shows interestingly higher specific capacities compared to the bare Fe2O3.
Catalytic Combustion of Diesel Soot over Metal Oxide Catalysts.-Five different metal oxides are t... more Catalytic Combustion of Diesel Soot over Metal Oxide Catalysts.-Five different metal oxides are tested as promoters for the combustion of diesel soot containing a high amount of adsorbed hydrocarbons. The activity of Fe2O3 and γ-Al2O3 in the exclusive oxidation of the hydrocarbon fraction is correlated with the surface area and strength of the metal-oxygen bond. The additional promotion of the combustion of the graphitic solid fraction by V2O5, CuO, and TiO2 is attributed to the low melting point of these oxides. The higher activity of Pt/. gamma.-Al2O3 for particulate combustion is explained by a spillover of activated oxygen from Pt to Al2O3.
The transfer hydrogenolysis of glycerol promoted by supported palladium catalysts is reported. Th... more The transfer hydrogenolysis of glycerol promoted by supported palladium catalysts is reported. The reactions were carried out under mild conditions (453 K and 5 bar of N 2) in absence of added hydrogen by using the reaction solvent, 2-propanol, as hydrogen source. The catalytic results are interpreted in terms of metal (Pd)-metal (Co or Fe) interaction that modifies the electronic properties of palladium and affords bimetallic PdM sites (M = Co or Fe), thus enhancing the catalytic properties of the systems in the conversion of glycerol as well as in the selectivity to 1,2-propanediol and 1-propanol. The transfer hydrogenolysis mechanism is here elucidated and involves the glycerol dehydration to 1hydroxyacetone and the subsequent hydrogenation of 1-hydroxyacetone to propylene glycol. Highlights The transfer hydrogenolysis of glycerol is promoted by coprecipitated Pd-catalysts The reaction solvent (2-propanol) was used as hydrogen-donor Pd-Co and Pd-Fe ensembles have been identified as the active catalytic phases CTH mechanism involves the glycerol dehydration and subsequent hydrogenation
ABSTRACT A microstructural characterization by XRD, FT-IR and temperature programmed reduction (T... more ABSTRACT A microstructural characterization by XRD, FT-IR and temperature programmed reduction (TPR) of unsupported FeV and K-FeV catalysts, prepared by solid-state synthesis, is reported. The formation of FexVyOz mixed phases of different compositions has been evidenced depending on the V/Fe ratio and calcination temperature. The catalytic activity of the samples in the combustion of diesel soot has been investigated with the aim to understand the role of FexVyOz mixed phases in the title reaction.
The selective conversion of glycerol (I) into 1,2-propanediol (II) in the presence of a Pd cataly... more The selective conversion of glycerol (I) into 1,2-propanediol (II) in the presence of a Pd catalyst under inert atmosphere is described for the first time. The hydrogen necessary for the hydrogenolysis reaction derives from the dehydrogenation of the solvent, promoted by supported palladium, itself reduced in situ by alcohols.-(MUSOLINO, M.
... References. 1. AF Ahlstrom and CUI Odenbrand. Appl. Catal. 60 (1990), p. 157. View Record in ... more ... References. 1. AF Ahlstrom and CUI Odenbrand. Appl. Catal. 60 (1990), p. 157. View Record in Scopus | Cited By in Scopus (62). 2. J. Van Doorn, J. Varloud, P. Mériaudeau, V. Perrichon, M. Chevrier and C. Gauthier. Appl. Catal. B: Environ. 1 (1992), p. 117. ...
Selective catalytic reduction of campholenic aldehyde to naturanol was investigated over Sn-and F... more Selective catalytic reduction of campholenic aldehyde to naturanol was investigated over Sn-and Fe-doped SiO 2 , and Fe 2 O 3-supported Pd catalysts. On Pd/SiO 2 and Pd-Sn/SiO 2 only saturated campholenic aldehyde is formed. Addition of Fe increases the C=O hydrogenation rate producing the corresponding unsaturated alcohol with a good selectivity. Also Fe 2 O 3-supported catalysts were found to be more selective towards carbonyl hydrogenation. Addition of tin to Pd/Fe 2 O 3 contributes to a further selectivity enhancement towards naturanol.
Liquid phase hydrogenation and isomerization of some α,β-unsaturated primary and secondary alcoho... more Liquid phase hydrogenation and isomerization of some α,β-unsaturated primary and secondary alcohols have been investigated in tetrahydrofuran over a 2.5% TiO2 supported palladium catalyst at 303K and 0.01MPa partial hydrogen pressure. The double bond isomerization reaction of these substrates leads also to formation of the corresponding saturated aldehydes or ketones. Catalytic activity and selectivity were found to depend strongly on the steric and electronic effects of the substituents on the double bond of the alcohol. The less crowded is the olefinic bond of the unsaturated alcohol, the higher is the activity. Formation of two σ-alkyl palladium bonded intermediates was postulated to explain the different selectivity towards hydrogenated and isomerized products observed for α,β-unsaturated alcohols used. 2-Propen-1-ol exhibited the highest activity and selectivity for double bond migration leading to propanal up to 80% yield.
ABSTRACT The gas-phase interaction of cis-2-butene-1,4-diol (C-2-OL) with silica supported Pd and... more ABSTRACT The gas-phase interaction of cis-2-butene-1,4-diol (C-2-OL) with silica supported Pd and Pt nanoparticles has been studied using infrared spectroscopy at room temperature. Samples were prepared according to standard recipes and characterized through TEM and the IR spectroscopy of adsorbed carbon monoxide at room temperature. Whereas the reaction with hydrogen of C-2-OL in ethanol solutions yields hydrogenated products through a complex network, and no reaction takes place in the absence of hydrogen, in the present case C-2-OL is converted first to 2,5-dihydrofuran (2,5-DHF) and water. This step occurs on the silica support at room temperature, probably through the intermediacy of the surface species –Si–O–CH2–CHCH–CH2–OH. The presence of Pd nanoparticles allows, at ca. 100°C, the subsequent isomerization of 2,5-DHF to 2,3-dihydrofuran (2,3-DHF). The same reaction requires a higher temperature (ca. 150°C) with the Pt catalyst. At higher temperatures, the expected dehydrogenation of both 2,5- and 2,3-DHFs to furan takes place. On the support alone at 350°C 2,5-DHF is converted to furan, and 2,3-DHF to carbonyl-containing species (as suggested in the literature), through thermal reactions.
... Catal. A, 95 (1995) 235. [2] G. Neri, MG Musolino, C. Milone and S. Galvagno, Ind. Eng. Chem.... more ... Catal. A, 95 (1995) 235. [2] G. Neri, MG Musolino, C. Milone and S. Galvagno, Ind. Eng. Chem. Res., 34 (1995) 2226. [3] K. Brand and J. Steiner, Ber. Dent. Chem. Ges., 55 (1923) 883. [4] HJJanssen, AJ Kruithof, GJ Steghius and KR Westerterp, Ind. Eng. Chem. ...
... in Scheme 2. A different mechanism of reaction has been reported by Janssen et al. [ 7,8 ] . ... more ... in Scheme 2. A different mechanism of reaction has been reported by Janssen et al. [ 7,8 ] . They have suggested that DNT is converted to 4HA2NT and 2A4NT through two parallel reactions, whereas 240 13 N02 CH3 H3 ~' N02 H2 _ / I 02 2 H2 NH2 N02 Scheme 2. G. Neri et al ...
An improved HPLC method was developed for the separation and quantification of 2,4-dinitrotoluene... more An improved HPLC method was developed for the separation and quantification of 2,4-dinitrotoluene and its reduction products. Gradient elution, with a water–acetonitrile mobile phase, was selected for the separation of all components including the 2,4-nitrohydroxyaminotoluene isomers. Provisional identification of the isomer intermediates has been obtained by their UV–Vis spectra.
... Similar deviations in the fitting of the concentration of the intermediate compounds have bee... more ... Similar deviations in the fitting of the concentration of the intermediate compounds have been reported by Janssen (1990b) by using the same reaction mechanism. The experimental results recently reported by us (Neri et al., 1995) have suggested that QA2NT is likely to be ...
... Notwithstanding the great industrial interest for this reaction, few papers, focusing their a... more ... Notwithstanding the great industrial interest for this reaction, few papers, focusing their attention on the reaction mechanism, have however appeared in the literature (Kut et al., 1987; Janssen et al, 1990a,b; Neri et al., 1995a,b). In previous papers we have investigated the ...
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is ...
The effect of the type of dopant (titanium and manganese) and of the reduced graphene oxide conte... more The effect of the type of dopant (titanium and manganese) and of the reduced graphene oxide content (rGO, 30 or 50 wt %) of the α-Fe2O3@rGO nanocomposites on their microstructural properties and electrochemical performance was investigated. Nanostructured composites were synthesized by a simple one-step solvothermal method and evaluated as anode materials for sodium ion batteries. The doping does not influence the crystalline phase and morphology of the iron oxide nanoparticles, but remarkably increases stability and Coulombic efficiency with respect to the anode based on the composite α-Fe2O3@rGO. For fixed rGO content, Ti-doping improves the rate capability at lower rates, whereas Mn-doping enhances the electrode stability at higher rates, retaining a specific capacity of 56 mAhg−1 at a rate of 2C. Nanocomposites with higher rGO content exhibit better electrochemical performance.
Transition metal oxides on reduced graphene oxide (TMO@rGO) nanocomposites were successfully prep... more Transition metal oxides on reduced graphene oxide (TMO@rGO) nanocomposites were successfully prepared via a very simple one-step solvothermal process, involving the simultaneous (thermal) reduction of graphene oxide to graphene and the deposition of TMO nanoparticles over its surface. Texture and morphology, microstructure, and chemical and surface compositions of the nanocomposites were investigated via scanning electron microscopy, X-ray diffraction, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results prove that Fe2O3@rGO, CoFe2O4@rGO, and CoO@rGO are obtained by using Fe and/or Co acetates as oxide precursors, with the TMO nanoparticles uniformly anchored onto the surface of graphene sheets. The electrochemical performance of the most promising nanocomposite was evaluated as anode material for sodium ion batteries. The preliminary results of galvanostatic cycling prove that Fe2O3@rGO nanocomposite exhibits better rate capability and stability...
Hematite/reduced graphene oxide (Fe2O3/rGO) nanocomposite was successfully fabricated via a facil... more Hematite/reduced graphene oxide (Fe2O3/rGO) nanocomposite was successfully fabricated via a facile solvothermal reaction of iron precursor solution and GO leading to simultaneous deposition of iron oxide nanoparticles and in situ reduction of GO without any reducing agent. Texture and morphology, microstructure, chemical and surface composition of the nanocomposite were investigated by scanning electron microscopy, Xray diffraction, Raman spectroscopy, thermo-gravimetric analysis and X-ray photoelectron spectroscopy, respectively. Its electrochemical performance as anode material for sodium ion batteries was preliminarily evaluated via galvanostatic cycling. The results prove that the Fe2O3 nanoparticles are uniformly anchored onto the surface of graphene nanosheets and that the Fe2O3/rGO nanocomposite shows interestingly higher specific capacities compared to the bare Fe2O3.
Catalytic Combustion of Diesel Soot over Metal Oxide Catalysts.-Five different metal oxides are t... more Catalytic Combustion of Diesel Soot over Metal Oxide Catalysts.-Five different metal oxides are tested as promoters for the combustion of diesel soot containing a high amount of adsorbed hydrocarbons. The activity of Fe2O3 and γ-Al2O3 in the exclusive oxidation of the hydrocarbon fraction is correlated with the surface area and strength of the metal-oxygen bond. The additional promotion of the combustion of the graphitic solid fraction by V2O5, CuO, and TiO2 is attributed to the low melting point of these oxides. The higher activity of Pt/. gamma.-Al2O3 for particulate combustion is explained by a spillover of activated oxygen from Pt to Al2O3.
The transfer hydrogenolysis of glycerol promoted by supported palladium catalysts is reported. Th... more The transfer hydrogenolysis of glycerol promoted by supported palladium catalysts is reported. The reactions were carried out under mild conditions (453 K and 5 bar of N 2) in absence of added hydrogen by using the reaction solvent, 2-propanol, as hydrogen source. The catalytic results are interpreted in terms of metal (Pd)-metal (Co or Fe) interaction that modifies the electronic properties of palladium and affords bimetallic PdM sites (M = Co or Fe), thus enhancing the catalytic properties of the systems in the conversion of glycerol as well as in the selectivity to 1,2-propanediol and 1-propanol. The transfer hydrogenolysis mechanism is here elucidated and involves the glycerol dehydration to 1hydroxyacetone and the subsequent hydrogenation of 1-hydroxyacetone to propylene glycol. Highlights The transfer hydrogenolysis of glycerol is promoted by coprecipitated Pd-catalysts The reaction solvent (2-propanol) was used as hydrogen-donor Pd-Co and Pd-Fe ensembles have been identified as the active catalytic phases CTH mechanism involves the glycerol dehydration and subsequent hydrogenation
ABSTRACT A microstructural characterization by XRD, FT-IR and temperature programmed reduction (T... more ABSTRACT A microstructural characterization by XRD, FT-IR and temperature programmed reduction (TPR) of unsupported FeV and K-FeV catalysts, prepared by solid-state synthesis, is reported. The formation of FexVyOz mixed phases of different compositions has been evidenced depending on the V/Fe ratio and calcination temperature. The catalytic activity of the samples in the combustion of diesel soot has been investigated with the aim to understand the role of FexVyOz mixed phases in the title reaction.
The selective conversion of glycerol (I) into 1,2-propanediol (II) in the presence of a Pd cataly... more The selective conversion of glycerol (I) into 1,2-propanediol (II) in the presence of a Pd catalyst under inert atmosphere is described for the first time. The hydrogen necessary for the hydrogenolysis reaction derives from the dehydrogenation of the solvent, promoted by supported palladium, itself reduced in situ by alcohols.-(MUSOLINO, M.
... References. 1. AF Ahlstrom and CUI Odenbrand. Appl. Catal. 60 (1990), p. 157. View Record in ... more ... References. 1. AF Ahlstrom and CUI Odenbrand. Appl. Catal. 60 (1990), p. 157. View Record in Scopus | Cited By in Scopus (62). 2. J. Van Doorn, J. Varloud, P. Mériaudeau, V. Perrichon, M. Chevrier and C. Gauthier. Appl. Catal. B: Environ. 1 (1992), p. 117. ...
Selective catalytic reduction of campholenic aldehyde to naturanol was investigated over Sn-and F... more Selective catalytic reduction of campholenic aldehyde to naturanol was investigated over Sn-and Fe-doped SiO 2 , and Fe 2 O 3-supported Pd catalysts. On Pd/SiO 2 and Pd-Sn/SiO 2 only saturated campholenic aldehyde is formed. Addition of Fe increases the C=O hydrogenation rate producing the corresponding unsaturated alcohol with a good selectivity. Also Fe 2 O 3-supported catalysts were found to be more selective towards carbonyl hydrogenation. Addition of tin to Pd/Fe 2 O 3 contributes to a further selectivity enhancement towards naturanol.
Liquid phase hydrogenation and isomerization of some α,β-unsaturated primary and secondary alcoho... more Liquid phase hydrogenation and isomerization of some α,β-unsaturated primary and secondary alcohols have been investigated in tetrahydrofuran over a 2.5% TiO2 supported palladium catalyst at 303K and 0.01MPa partial hydrogen pressure. The double bond isomerization reaction of these substrates leads also to formation of the corresponding saturated aldehydes or ketones. Catalytic activity and selectivity were found to depend strongly on the steric and electronic effects of the substituents on the double bond of the alcohol. The less crowded is the olefinic bond of the unsaturated alcohol, the higher is the activity. Formation of two σ-alkyl palladium bonded intermediates was postulated to explain the different selectivity towards hydrogenated and isomerized products observed for α,β-unsaturated alcohols used. 2-Propen-1-ol exhibited the highest activity and selectivity for double bond migration leading to propanal up to 80% yield.
ABSTRACT The gas-phase interaction of cis-2-butene-1,4-diol (C-2-OL) with silica supported Pd and... more ABSTRACT The gas-phase interaction of cis-2-butene-1,4-diol (C-2-OL) with silica supported Pd and Pt nanoparticles has been studied using infrared spectroscopy at room temperature. Samples were prepared according to standard recipes and characterized through TEM and the IR spectroscopy of adsorbed carbon monoxide at room temperature. Whereas the reaction with hydrogen of C-2-OL in ethanol solutions yields hydrogenated products through a complex network, and no reaction takes place in the absence of hydrogen, in the present case C-2-OL is converted first to 2,5-dihydrofuran (2,5-DHF) and water. This step occurs on the silica support at room temperature, probably through the intermediacy of the surface species –Si–O–CH2–CHCH–CH2–OH. The presence of Pd nanoparticles allows, at ca. 100°C, the subsequent isomerization of 2,5-DHF to 2,3-dihydrofuran (2,3-DHF). The same reaction requires a higher temperature (ca. 150°C) with the Pt catalyst. At higher temperatures, the expected dehydrogenation of both 2,5- and 2,3-DHFs to furan takes place. On the support alone at 350°C 2,5-DHF is converted to furan, and 2,3-DHF to carbonyl-containing species (as suggested in the literature), through thermal reactions.
... Catal. A, 95 (1995) 235. [2] G. Neri, MG Musolino, C. Milone and S. Galvagno, Ind. Eng. Chem.... more ... Catal. A, 95 (1995) 235. [2] G. Neri, MG Musolino, C. Milone and S. Galvagno, Ind. Eng. Chem. Res., 34 (1995) 2226. [3] K. Brand and J. Steiner, Ber. Dent. Chem. Ges., 55 (1923) 883. [4] HJJanssen, AJ Kruithof, GJ Steghius and KR Westerterp, Ind. Eng. Chem. ...
... in Scheme 2. A different mechanism of reaction has been reported by Janssen et al. [ 7,8 ] . ... more ... in Scheme 2. A different mechanism of reaction has been reported by Janssen et al. [ 7,8 ] . They have suggested that DNT is converted to 4HA2NT and 2A4NT through two parallel reactions, whereas 240 13 N02 CH3 H3 ~' N02 H2 _ / I 02 2 H2 NH2 N02 Scheme 2. G. Neri et al ...
An improved HPLC method was developed for the separation and quantification of 2,4-dinitrotoluene... more An improved HPLC method was developed for the separation and quantification of 2,4-dinitrotoluene and its reduction products. Gradient elution, with a water–acetonitrile mobile phase, was selected for the separation of all components including the 2,4-nitrohydroxyaminotoluene isomers. Provisional identification of the isomer intermediates has been obtained by their UV–Vis spectra.
... Similar deviations in the fitting of the concentration of the intermediate compounds have bee... more ... Similar deviations in the fitting of the concentration of the intermediate compounds have been reported by Janssen (1990b) by using the same reaction mechanism. The experimental results recently reported by us (Neri et al., 1995) have suggested that QA2NT is likely to be ...
... Notwithstanding the great industrial interest for this reaction, few papers, focusing their a... more ... Notwithstanding the great industrial interest for this reaction, few papers, focusing their attention on the reaction mechanism, have however appeared in the literature (Kut et al., 1987; Janssen et al, 1990a,b; Neri et al., 1995a,b). In previous papers we have investigated the ...
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is ...
Uploads
Papers by Maria Musolino