A thermoanalytic-mass spectrometric study of oxide-supported acetyl acetonates

Veen, J.A.R. van; Jong-Versloot, Ms.P.C. De; Kessel, Gerard M.M. van; Fels, F.J.

doi:10.1016/0040-6031(89)85404-8

Cited by 38 publications

(21 citation statements)

References 6 publications

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“…In addition, Eq. [8] can also be applied under isothermal experimental conditions, with the supposition that p(x) fi 1.…”

Section: Kinetic Analysismentioning

confidence: 99%

“…The data for different heating rates must be grouped together in a single relation from which a single set of activation parameters, E a and A, is obtained. Equation [8] is derived from the logarithmic form of Eq. [2]: [25] ln g a ð Þ ¼ ln…”

Section: Kinetic Analysismentioning

confidence: 99%

“…In this respect, acetylacetonate complexes have a significant role, [5][6][7][8] because they are easily synthesized and purified; their volatility may also be finely tuned for chemical vapor deposition (CVD) applications by the controlled introduction of fluorine atoms. Moreover, the supported metal phase is simply obtained by the controlled thermal removal of acetylacetonate ligands.…”

Section: Introductionmentioning

confidence: 99%

“…However, the final properties of the metal phase, particularly for catalytic purposes, are generally dependent on the nature of the chemical interactions between the organometallic complex and the oxide support. [5][6][7][8][9] Thermochemical methods play a primary role in the characterization of the kinetics of the decomposition processes of the supported organometallics, to yield the desired metal phase. Many different approaches have been proposed, ranging from conventional differential thermogravimetric (DTG) studies [6,8] to more specialized flow techniques for catalyst characterization.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9] Thermochemical methods play a primary role in the characterization of the kinetics of the decomposition processes of the supported organometallics, to yield the desired metal phase. Many different approaches have been proposed, ranging from conventional differential thermogravimetric (DTG) studies [6,8] to more specialized flow techniques for catalyst characterization. [10][11][12] A large amount of information about a catalytic system can be obtained by using thermogravimetric (TG) techniques (working with an appropriate temperature program).…”

Section: Introductionmentioning

confidence: 99%

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A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

Janković

Mentus

2009

Metall Mater Trans A

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The nonisothermal decomposition process of the powder sample of palladium acetylacetonate [Pd(acac) 2 ] was investigated by thermogravimetric (TG) and X-ray diffraction (XRD) techniques. The experimental TG and differential thermogravimetric (DTG) curves were obtained at different heating rates (b = 2°C min À1 , 5°C min À1 , 10°C min À1 , 20°C min À1 , and 30°C min À1 ) under a pure nitrogen (N 2 ) atmosphere. The kinetic triplet (A, E a , and model function f(a)) was determined using different kinetic methods. It was found that the apparent activation energy was not really changed and was almost independent with respect to the level of conversion (a). This result suggests that the nonisothermal decomposition process of palladium acetylacetonate follows a single-step reaction. Practically constant E a values approximating 140.1 ± 1.5 kJ mol À1 were found. It was concluded that the reaction model R3, for the integral composite method I, is the model with the best regression and with kinetic parameters that are both unique and very similar to those obtained by the Friedman isoconversional method. In addition, it was found that the results obtained from both the Master-plot and Ma´lek methods confirm the results obtained from the multiple-rate isotemperature method, specifically, that the R3 (contracting volume) reaction mechanism can best describe the investigated decomposition process. By applying the Miura procedure, a distributed reactivity model (DRM) for the investigated decomposition process was established. From the a = a(E a ) dependence, the experimental distribution curve of E a was estimated. Using the nonlinear (NL) least-squares analysis, it was found that the Gaussian distribution model (with distribution parameters: E 0 = 138.4 kJ mol À1 and r = 0.71 kJ mol À1 ) represents the best reactivity model for describing the investigated process. Also, it was concluded that the E a values calculated by the Friedman isoconversional method and the estimated distribution curve (f(E a )), are correct, even in the case in which the investigated decomposition process occurs through a single-step reaction mechanism.

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“…In addition, Eq. [8] can also be applied under isothermal experimental conditions, with the supposition that p(x) fi 1.…”

Section: Kinetic Analysismentioning

confidence: 99%

Section: Kinetic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

Janković

Mentus

2009

Metall Mater Trans A

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Sinter‐Resistant Pd/SiO₂ Nanocatalyst Prepared by Impregnation Method

Weng

Zhang

et al. 2011

ChemCatChem

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Dispersed on sand: Well‐dispersed Pd/SiO2 nanocatalysts with Pd loadings between 0.5 and 5.0 wt % and an excellent resistance to sintering can be prepared by using a simple impregnation method using palladium bis‐acetylacetonate as the Pd precursor. The mean size of the Pd particles on SiO2 remains at 3–4 nm even after calcination at 800 °C. The catalyst exhibits good activity for CO oxidation and aerobic oxidation of benzyl alcohol.

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α-Alumina-Supported Nickel Catalysts Prepared from Nickel Acetylacetonate: A TPR Study

Molina

Poncelet

1998

Journal of Catalysis

155

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A thermoanalytic-mass spectrometric study of oxide-supported acetyl acetonates

Cited by 38 publications

References 6 publications

A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

Sinter‐Resistant Pd/SiO₂ Nanocatalyst Prepared by Impregnation Method

α-Alumina-Supported Nickel Catalysts Prepared from Nickel Acetylacetonate: A TPR Study

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A thermoanalytic-mass spectrometric study of oxide-supported acetyl acetonates

Cited by 38 publications

References 6 publications

A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

A Kinetic Study of the Nonisothermal Decomposition of Palladium Acetylacetonate Investigated by Thermogravimetric and X-Ray Diffraction Analysis Determination of Distributed Reactivity Model

Sinter‐Resistant Pd/SiO2 Nanocatalyst Prepared by Impregnation Method

α-Alumina-Supported Nickel Catalysts Prepared from Nickel Acetylacetonate: A TPR Study

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Sinter‐Resistant Pd/SiO₂ Nanocatalyst Prepared by Impregnation Method