Structure and chemical properties of Pt nitrate and application in three-way automotive emission catalysts

Dou, Danan; Liu, Di-Jia; Williamson, W. B.; Kharas, K. C. C.; Robota, Heinz J.

doi:10.1016/s0926-3373(00)00223-x

Cited by 41 publications

(25 citation statements)

References 22 publications

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“…Fig. 1 [5] retain their structure even after refluxing with alkali excess. The EXAFS data of the alkalized Pt nitrate solutions confirm the above conclusion.…”

Section: Resultsmentioning

confidence: 96%

Unique stability of μ-hydroxo ligands in Pt(IV) complexes towards alkaline hydrolysis

Beck¹,

Kriventsov²,

Fedotov³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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“…Fig. 1 [5] retain their structure even after refluxing with alkali excess. The EXAFS data of the alkalized Pt nitrate solutions confirm the above conclusion.…”

Section: Resultsmentioning

confidence: 96%

Unique stability of μ-hydroxo ligands in Pt(IV) complexes towards alkaline hydrolysis

Beck¹,

Kriventsov²,

Fedotov³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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“…Noble metals have been the main components of catalytic converters used for removing nitrogen oxides, carbon monoxide, and unburned hydrocarbons contained in the exhaust gas from automobiles [2]. They work not only as active species in the combustion of volatile organic compounds to harmless water and carbon dioxide [3], but also as an essential material in fuel cells to produce energy through electrochemical processes [4].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Dispersive Platinum Catalysts Impregnated on Titania-Incorporated Silica Support

Kim

You²,

Han³

et al. 2007

Catal Lett

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Highly dispersive silica-impregnated platinum catalysts were prepared by incorporating titania to the surface of silica support and by treating the impregnated platinum precursor with hydrogen peroxide. High dispersion of platinum on the titania-incorporated silica support was confirmed by XRD, TEM, EXAFS, and X-ray photoelectron spectroscopy (XPS) techniques. The platinum particles dispersed on silica ranged from 1 to 2 nm in size, although the loading amount of platinum was as high as 4 wt.%. The strong interaction between platinum and titania suppressed the migration and aggregation of the platinum particles on the surface, retaining a high dispersion of platinum. The platinum catalysts impregnated on the titania-incorporated silica showed higher catalytic activities in the combustion of methane than the platinum catalysts impregnated on the silica, while their catalytic activities were poor in the hydrogenation of nitrobenzene. Platinum dispersions and catalytic activities of the platinum catalysts on the silica support were discussed in relation to the strong interaction between platinum and titania.

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“…Therefore, it is possible that Pd complexes in the Pd nitrate solution might anchor to Al 2 O 3 by a ligand-exchange between the labile terminal H 2 O ligand with the surface Al-OH group, which is similar to the situation of Pt nitrate solution adsorbing on alumina. It has been reported that Pt complexes in Pt nitrate solution could anchor on alumina through ligand exchange of labile terminal H 2 O ligand with surface Al-OH groups [29], because platinum nitrate adsorbing on the support seems to be faster than hexachloroplatinic acid and can be completed in a few minutes. In preparation of Pd-N catalyst, rapid adsorption of Pd onto the support has been observed, and the subsequent drying process does not influence the Pd distribution on the alumina surface significantly.…”

Section: Discussionmentioning

confidence: 99%

Influences of Pd precursors and preparation method on the catalytic performances of Pd-only close-coupled catalysts

Zhu

Guo

et al. 2012

Journal of Industrial and Engineering Chemistry

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Structure and chemical properties of Pt nitrate and application in three-way automotive emission catalysts

Cited by 41 publications

References 22 publications

Unique stability of μ-hydroxo ligands in Pt(IV) complexes towards alkaline hydrolysis

Unique stability of μ-hydroxo ligands in Pt(IV) complexes towards alkaline hydrolysis

Preparation of Highly Dispersive Platinum Catalysts Impregnated on Titania-Incorporated Silica Support

Influences of Pd precursors and preparation method on the catalytic performances of Pd-only close-coupled catalysts

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