Pt/C obtained from carbon with different treatments and (NH4)2PtCl6 as a Pt precursor

Verde, Ysmael; Alonso, Gabriel Gutiérrez; Ramos, V. H. S.; Zhang, Huanhuan; Jacobson, Allan J.; Keer, Arturo

doi:10.1016/j.apcata.2004.09.013

Cited by 36 publications

(16 citation statements)

References 43 publications

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“…In order to achieve high catalytic performance with the low Pt loading, great effort must be put on Pt utilization and the enhancement of catalyst activity. Of the several factors which influence electrocatalytic activity of carbon-supported PEMFC catalysts, particle size, dispersion and structural effects, are of crucial importance [59][60][61][62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC

Yu,

2007

Journal of Power Sources

523

235

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Section: Introductionmentioning

confidence: 99%

Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC

Yu,

2007

Journal of Power Sources

523

235

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“…(NH 4 ) 2 [PtCl 6 ] has been shown to be a good precursor to obtain metallic Pt through thermolysis due to its low decomposition temperature12. The thermolysis mechanism has been investigated extensively13141516 including time-resolved EDE at the Cl K-edge and Pt L 3 edge with a time resolution of 10 seconds10, and several intermediates such as PtCl 4 14, PtCl 6 15 and cis-PtCl 2 (NH 3 ) 2 10, have been proposed.…”

mentioning

confidence: 99%

Microsecond time-resolved energy-dispersive EXAFS measurement and its application to film the thermolysis of (NH4)2[PtCl6]

Kong

Baudelet

Han

et al. 2012

Sci Rep

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Microsecond (μs) time-resolved extended X-ray absorption fine structure spectroscopy (EXAFS) has been developed using an energy-dispersive EXAFS (EDE) setup equipped with a silicon Quantum Detector ULTRA. The feasibility was investigated with a prototypical thermally driven redox reaction, the thermal decomposition of (NH4)2[PtCl6]. EXAFS data were collected with snapshots every 60 μs during the course of the thermolysis reaction, then averaged for 100 times along the reaction to get better signal to noise ratio which reduces the time resolution to 6 millisecond (ms). Our results provide direct structural evidence of cis-PtCl2(NH3)2 as the intermediate, together with continuous electronic and geometric structure dynamics of the reactant, intermediate and final product during the course of the thermolysis of (NH4)2[PtCl6]. The thermal effect on EXAFS signals at high temperatures is considered in the data analysis, which is essential to follow the reaction process correctly. This method could also be applied to other reaction dynamics.

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“…Nos travaux se sont principalement concentrés sur la précipitation par l'ajout de chlorure d'ammonium permettant la formation du sel (NH 4 ) 2 PtCl 6 réutilisable dans la synthèse de nouvelle couche catalytique [5].…”

Section: Récupération Du Ptunclassified

Récupération du platine contenu dans les piles à combustible basse température par voie hydrométallurgique

Denis

Billy

Laucournet

2013

MATEC Web of Conferences

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Abstract. The recovery of platinum in the catalyst layers of PEMFCs (proton exchange membrane fuel cells) is required to allow a transfer in industry.In this study, hydrometallurgical route was preferred to pyrometallurgical process, reducing both the destruction of the other components of the cell (membrane, . . .) and the formation of hazardous gas.In this work, the process includes a leaching step from a diluted aqua regia solution, followed by a precipitation step of platinum under the (NH 4 ) 2 PtCl 6 form. This salt can be used either for the synthesis of a new catalyst or to obtain a metallic platinum.Considering these steps the recovery efficiency has been found to be over 80 %, which bring out the potential of this strategy.Résumé. La récupération du platine contenu dans la couche catalytique des pilesà combustible est nécessaire pour viabiliser cette technologie vers le secteur industriel. Dans cetteétude la voie purement hydrométallurgique aété privilégiée au procédé de récupération pyrométallurgique,évitant la destruction des autres constituants de la pile (membrane, . . .) et limitant la formation de gaz toxique.Le procédé mise en oeuvre est constitué d'uneétape de lixiviationà partir d'un mélange HCl/HNO 3 , suivie par la précipitation d'un sel de platine (NH 4 ) 2 PtCl 6 pouvant soit servirà la synthèse d'un nouveau catalyseur soità l'obtention de platine métallique.Sur l'ensemble de la chaîne un rendement de récupération de plus de 80 % a puêtre obtenu mettant en avant le potentiel de cette stratégie.

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Pt/C obtained from carbon with different treatments and (NH4)2PtCl6 as a Pt precursor

Cited by 36 publications

References 43 publications

Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC

Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC

Microsecond time-resolved energy-dispersive EXAFS measurement and its application to film the thermolysis of (NH4)2[PtCl6]

Récupération du platine contenu dans les piles à combustible basse température par voie hydrométallurgique

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