Thermodynamics of the (Pt + Ga) system

Anrés, P.; Gaune‐Escard, M.; Bros, J.P.

doi:10.1016/0925-8388(95)01990-1

Cited by 18 publications

(12 citation statements)

References 10 publications

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“…The compositions and temperatures of invariant reactions fit well the experiments [5] except for the eutectic reaction, L/ GaPt 2 CGa 5 Pt 3 , for which the calculated temperature is 17K higher than the experimental data. The calculated enthalpies of mixing of the liquid phase at 1406K and the experimental measurements from [16] are shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

“…Anres et al [16,17] measured the integral enthalpy of mixing of the liquid in the Ga-Pt system using a very high temperature calorimeter in the temperature and molar fraction range 1073-1464 K and 0-0.61 at.% Pt, respectively. The molar enthalpies of formation and the enthalpy of fusion of the solid GaPt compound were also determined.…”

Section: Thermodynamic Datamentioning

confidence: 99%

“…The data from [5] were offered relatively large weight factors since they constructed a reasonable phase diagram over almost the entire composition range. In this study, the thermodynamic parameters for the liquid and the fcc(Pt) phases were optimized at the first stage based on the enthalpies of mixing of liquid alloys [16,17] and the phase boundary information [5]. The parameters of the intermediate phases were optimized subsequently.…”

Section: Assessment Proceduresmentioning

confidence: 99%

“…Oya [15] revised Pt-rich portion of the Pt-Ga phase diagram by metallography, X-ray analysis and DTA. In the series of measurements of integral enthalpies of mixing the liquidus at temperature range 1071-1366 K were determined [16].…”

Section: Experimental Phase Diagram Datamentioning

confidence: 99%

“…The experimental data from [5,[16][17][18][19][20] were used in the optimization. The data from [5] were offered relatively large weight factors since they constructed a reasonable phase diagram over almost the entire composition range.…”

Section: Assessment Proceduresmentioning

confidence: 99%

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Thermodynamic assessment of the Ga–Pt system

Wang

et al. 2006

Intermetallics

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Section: Resultsmentioning

confidence: 99%

Section: Thermodynamic Datamentioning

confidence: 99%

Section: Assessment Proceduresmentioning

confidence: 99%

Section: Experimental Phase Diagram Datamentioning

confidence: 99%

Section: Assessment Proceduresmentioning

confidence: 99%

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Thermodynamic assessment of the Ga–Pt system

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Effects of Ga doping on Pt/CeO₂‐Al₂O₃ catalysts for propane dehydrogenation

et al. 2016

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This paper describes catalytic consequencesThis paper describes catalytic consequences of Pt/CeO 2 -Al 2 O 3 catalysts promoted with Ga species for propane dehydrogenation. A series of PtGa/CeO 2 -Al 2 O 3 catalysts were prepared by a sequential impregnation method. The as-prepared catalysts were characterized employing N 2 adsorption-desorption, X-ray diffrtaction, temperature programmed reduction, O 2 volumetric chemisorption, H 2 -O 2 titration, and transmission electron microscopy. We have shown that Ga 31 cations are incorporated into the cubic fluorite structure of CeO 2 , enhancing both lattice oxygen storage capacity and surface oxygen mobility. The enhanced reducibility of CeO 2 is indicative of higher capability to eliminate the coke deposition and thus is beneficial to the improvement of catalytic stability. Density functional theory calculations confirm that the addition of Ga is prone to improve propylene desorption and greatly suppress deep dehydrogenation and the following coke formation. The catalytic performance shows a strong dependence on the content of Ga addition. The optimal loading content of Ga is 3 wt %, which results in the maximal propylene selectivity together with the best catalytic stability against coke accumulation.

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