Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments.

D. Radivojevic, Kulathuiyer Seshan, Leonardus Lefferts

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

2 Citations (Scopus)

Abstract

A method to prepare platinum on silica catalyst using temperatures as low as possible is a goal of this study. Therefore, thermal stability in both oxidizing and reducing atmosphere of 8 different precursors was studied with thermogravimetric analyses (TGA). Based on these data, the precursors were tested to prepare silica supported catalysts, resulting in relationship between the thermal stability of the precursors, the procedures of impregnation, reduction and calcination with the final dispersion on silica. Platinum precursors decomposed more easily in reducing than in oxidizing environment, due to thermochemistry. Catalysts prepared by using ion-exchange and direct reduction in hydrogen resulted in highly dispersed platinum particles on silica. PtClx and PtOx species, when present during catalyst preparation, cause platinum sintering at temperatures higher than 250°C (PtClx) and 350°C (PtOx), respectively. These species can be converted more easily in hydrogen than in air.
Original languageUndefined
Title of host publicationStudies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts
Place of PublicationLouvain-la-Neuve, België
PublisherElsevier
Pages-
DOIs
Publication statusPublished - 10 Sep 2006

Publication series

Name
PublisherElsevier
Volume162
ISSN (Print)0922-3444
ISSN (Electronic)1875-6670

Keywords

  • Sintering
  • IR-78501
  • Dispersion
  • TGA
  • platinum precursor
  • METIS-236829
  • Pt/SiO2 catalyst

Cite this

Radivojevic, D., Seshan, K., & Lefferts, L. (2006). Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments. In Studies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts (pp. -). Louvain-la-Neuve, België: Elsevier. https://doi.org/10.1016/S0167-2991(06)80949-3
Radivojevic, D. ; Seshan, Kulathuiyer ; Lefferts, Leonardus. / Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments. Studies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts. Louvain-la-Neuve, België : Elsevier, 2006. pp. -
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abstract = "A method to prepare platinum on silica catalyst using temperatures as low as possible is a goal of this study. Therefore, thermal stability in both oxidizing and reducing atmosphere of 8 different precursors was studied with thermogravimetric analyses (TGA). Based on these data, the precursors were tested to prepare silica supported catalysts, resulting in relationship between the thermal stability of the precursors, the procedures of impregnation, reduction and calcination with the final dispersion on silica. Platinum precursors decomposed more easily in reducing than in oxidizing environment, due to thermochemistry. Catalysts prepared by using ion-exchange and direct reduction in hydrogen resulted in highly dispersed platinum particles on silica. PtClx and PtOx species, when present during catalyst preparation, cause platinum sintering at temperatures higher than 250°C (PtClx) and 350°C (PtOx), respectively. These species can be converted more easily in hydrogen than in air.",
keywords = "Sintering, IR-78501, Dispersion, TGA, platinum precursor, METIS-236829, Pt/SiO2 catalyst",
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Radivojevic, D, Seshan, K & Lefferts, L 2006, Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments. in Studies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts. Elsevier, Louvain-la-Neuve, België, pp. -. https://doi.org/10.1016/S0167-2991(06)80949-3

Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments. / Radivojevic, D.; Seshan, Kulathuiyer; Lefferts, Leonardus.

Studies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts. Louvain-la-Neuve, België : Elsevier, 2006. p. -.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

TY - GEN

T1 - Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments.

AU - Radivojevic, D.

AU - Seshan, Kulathuiyer

AU - Lefferts, Leonardus

PY - 2006/9/10

Y1 - 2006/9/10

N2 - A method to prepare platinum on silica catalyst using temperatures as low as possible is a goal of this study. Therefore, thermal stability in both oxidizing and reducing atmosphere of 8 different precursors was studied with thermogravimetric analyses (TGA). Based on these data, the precursors were tested to prepare silica supported catalysts, resulting in relationship between the thermal stability of the precursors, the procedures of impregnation, reduction and calcination with the final dispersion on silica. Platinum precursors decomposed more easily in reducing than in oxidizing environment, due to thermochemistry. Catalysts prepared by using ion-exchange and direct reduction in hydrogen resulted in highly dispersed platinum particles on silica. PtClx and PtOx species, when present during catalyst preparation, cause platinum sintering at temperatures higher than 250°C (PtClx) and 350°C (PtOx), respectively. These species can be converted more easily in hydrogen than in air.

AB - A method to prepare platinum on silica catalyst using temperatures as low as possible is a goal of this study. Therefore, thermal stability in both oxidizing and reducing atmosphere of 8 different precursors was studied with thermogravimetric analyses (TGA). Based on these data, the precursors were tested to prepare silica supported catalysts, resulting in relationship between the thermal stability of the precursors, the procedures of impregnation, reduction and calcination with the final dispersion on silica. Platinum precursors decomposed more easily in reducing than in oxidizing environment, due to thermochemistry. Catalysts prepared by using ion-exchange and direct reduction in hydrogen resulted in highly dispersed platinum particles on silica. PtClx and PtOx species, when present during catalyst preparation, cause platinum sintering at temperatures higher than 250°C (PtClx) and 350°C (PtOx), respectively. These species can be converted more easily in hydrogen than in air.

KW - Sintering

KW - IR-78501

KW - Dispersion

KW - TGA

KW - platinum precursor

KW - METIS-236829

KW - Pt/SiO2 catalyst

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Radivojevic D, Seshan K, Lefferts L. Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments. In Studies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts. Louvain-la-Neuve, België: Elsevier. 2006. p. - https://doi.org/10.1016/S0167-2991(06)80949-3