The relation of catalyst acidity to the electrode potential recorded in an automatic titration

Clark, Richard O. D.; Ballou, E. V.; Barth, Roger

doi:10.1016/s0003-2670(60)80042-6

Cited by 14 publications

(1 citation statement)

References 14 publications

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“…Potentiometric titration in nonaqueous solvents was proposed more than 3 decades ago for the characterization of acid properties of solid catalysts (27). However, because of several experimental difficulties, this method was not developed further as a standard characterization procedure.…”

Section: The Access Key To Proton Transfer Properties Of Catalyststhementioning

confidence: 99%

The Phenomena of Proton Transfer from Catalytic Oxides

Schwarz

1999

Journal of Colloid and Interface Science

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Section: The Access Key To Proton Transfer Properties Of Catalyststhementioning

confidence: 99%

The Phenomena of Proton Transfer from Catalytic Oxides

Schwarz

1999

Journal of Colloid and Interface Science

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Examination and standardisation of amine titration in surface acidity measurements of silicas, aluminas and synthetic zeolites

Unger¹,

Kittelmann²,

Kreis³

1981

J. Chem. Technol. Biotechnol.

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The amine titration method using Hammett and arylmethanol indicators has been examined on selected samples of porous silica, active alumina and synthetic zeolites. On the basis of the successive approximation technique the evaluation of surface acid strength distribution has been standardised. A new method has been developed to assess the total acidity without employing indicators. The distinction between Bronsted and Lewis acidity through measuring the HO and HR acidity distribution function on aluminas and zeolites is shown to be erroneous. The acidity is strongly affected by the size of amine and by the density of surface acid centres-as demonstrated on a series of silicas and on synthetic zeolites. The size dependence can be utilised to detect the acidity of distinct pore size ranges within a given porous solid. Under certain conditions the acidity measurements can be correlated with those obtained from other techniques such as heterogeneous exchange and infrared spectroscopy.

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Examination and standardisation of amine titration in surface acidity measurements of silicas, aluminas and synthetic zeolites

Unger

Kittelmann

Kreis

1981

J. Chem. Technol. Biotechnol.

View full text Add to dashboard Cite

The amine titration method using Hammett and arylmethanol indicators has been examined on selected samples of porous silica, active alumina and synthetic zeolites. On the basis of the successive approximation technique the evaluation of surface acid strength distribution has been standardised. A new method has been developed to assess the total acidity without employing indicators. The distinction between Bronsted and Lewis acidity through measuring the Ho and HR acidity distribution function on aluminas and zeolites is shown to be erroneous. The acidity is strongly affected by the size of amine and by the density of surface acid centres—as demonstrated on a series of silicas and on synthetic zeolites. The size dependence can be utilised to detect the acidity of distinct pore size ranges within a given porous solid. Under certain conditions the acidity measurements can be correlated with those obtained from other techniques such as heterogeneous exchange and infrared spectroscopy.

show abstract

The relation of catalyst acidity to the electrode potential recorded in an automatic titration

Cited by 14 publications

References 14 publications

The Phenomena of Proton Transfer from Catalytic Oxides

The Phenomena of Proton Transfer from Catalytic Oxides

Examination and standardisation of amine titration in surface acidity measurements of silicas, aluminas and synthetic zeolites

Examination and standardisation of amine titration in surface acidity measurements of silicas, aluminas and synthetic zeolites

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