Improved method for determining adsorption isotherms by liquid chromatography on long and short fibrous material

Noël, Luc; Ménard, Hugues

doi:10.1016/s0021-9673(00)94598-9

Cited by 3 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption isotherm analyses were carried out with a HPLC system (Agilent HPLC 1100 Series) equipped with a diode array detector (Agilent, DAD module 1100 series) operating at a wavelength of 278 nm. Adsorption isotherms were performed according to a method previously described in the literature. − The temperature was maintained at 25 °C using a thermostat module (Agilent 1100 series thermostated column compartment). The buffer flow rate was set to 1 mL min -1 .…”

Section: Methodsmentioning

confidence: 99%

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

et al. 2004

Self Cite

View full text Add to dashboard Cite

Original and versatile new materials for the electrocatalytic hydrogenation of organic compounds were designed. The materials consist of reticulated glassy carbon cathode electrodes in which the modified silica particles (average diameter 40-63 microm) were dynamically circulated. The modification of the silica surface is 2-fold. First, the silica is surface-modified using organic functions such as -OSi(CH3)2(CH2)3OCH2CH-(OH)(CH)2OH (SiO2-Diol), -OSi(CH3)2(CH2)7CH3 (SiO2-C8), and -OSi(CH3)2C6H5 (SiO2-Phenyl). Second, these silica particles were further modified by vapor phase deposition of nickel nanoaggregates (used as sites for hydrogen atoms and electric contacts with the electrode material), which does not destroy or alter the organic functionalization as demonstrated by thermogravimetric analysis-mass spectrometry and Raman, diffuse reflectance IR Fourier transform, and Auger electron spectroscopies. The new concept stems from relative adsorption and desorption properties of the organic molecules and their corresponding reduced products into the organic functionalization of the surface-modified silica. In this work, the electrocatalytic hydrogenation cyclohexanone was used to test the concept. The performances (amount of cyclohexanol vs time of generated electrolysis at constant current) are measured and compared for the various bonded organic functions of the silica surface listed above, along with the unmodified silica particles (but still containing nickel nanoaggregates) and the presence or absence of methanol in solution. The measurements of the adsorption isotherms of cyclohexanone, and the calculations of the interaction energies (MM3 force field) between the chemisorbed organic functions and the substrates, corroborate perfectly the electrocatalysis results.

show abstract

Section: Methodsmentioning

confidence: 99%

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

Adsorption Enthalpy Determination on Silica-Supported Metallic Nanoparticles

Clément

Ménard

2010

Langmuir

Self Cite

View full text Add to dashboard Cite

A new specific method to measure adsorption enthalpy on supported metallic nanoparticles has been developed. This method is based on gas chromatography measurements, and it allows the calculation of adsorption enthalpies on metallic nanoparticles while neglecting the effect of the supporting particle. In this paper, we discuss the specific case of the adsorption of benzene on the surface of silica-supported gold nanoparticles. The results show a good correlation with similar values found in the literature.

show abstract

The adsorption of cyclohexanone on aluminum oxide hydroxide powders in relation to its electrocatalytic hydrogenation

Laplante¹,

Bouchard²,

Dubé³

et al. 2003

Can. J. Chem.

View full text Add to dashboard Cite

Henry's law constants were determined for cyclohexanone adsorption onto aluminium oxide hydroxide powders by dynamic isotherm measurements using the HPLC method. The key parameters that control cyclohexanone adsorption were established. Further, it is suggested that the amount of cyclohexanone adsorbed onto aluminium oxide hydroxide compounds (AOHC) is of paramount importance for its electrocatalytic hydrogenation in the presence of composite nickelAOCH powders.Key words: adsorption isotherm, electrocatalytic hydrogenation (ECH), cyclohexanone, aluminum oxide hydroxide powders.

show abstract

Improved method for determining adsorption isotherms by liquid chromatography on long and short fibrous material

Cited by 3 publications

References 8 publications

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

Adsorption Enthalpy Determination on Silica-Supported Metallic Nanoparticles

The adsorption of cyclohexanone on aluminum oxide hydroxide powders in relation to its electrocatalytic hydrogenation

Contact Info

Product

Resources

About

Improved method for determining adsorption isotherms by liquid chromatography on long and short fibrous material

Cited by 3 publications

References 8 publications

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

Rational Design of Original Materials for the Electrocatalytic Hydrogenation Reactions: Concept, Preparation, Characterization, and Theoretical Analysis

Adsorption Enthalpy Determination on Silica-Supported Metallic Nanoparticles

The adsorption of cyclohexanone on aluminum oxide  hydroxide powders in relation to its electrocatalytic hydrogenation

Contact Info

Product

Resources

About

The adsorption of cyclohexanone on aluminum oxide hydroxide powders in relation to its electrocatalytic hydrogenation