Efficient aerosol assisted delivery of low-volatility precursor for CVD applications

Pasin, Laila; Meyer, Jörg; Eiche, Elisabeth; Weis, Frederik; Kasper, Gerhard

doi:10.1016/j.jaerosci.2018.09.003

Cited by 2 publications

(3 citation statements)

References 34 publications

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“…A schematic of the FB-CVD reactor, described previously in full detail [7], is shown in Figure 1. It consists essentially of a segmented quartz glass tube with a glass frit bottom, mounted inside a vertical furnace.…”

Section: Apparatus For Production Of Catalysts By Fluidized Bed Chemimentioning

confidence: 99%

“…this regard, CVD offers significant potential, due to its excellent reproducibility and control over the structure of the active phase(s) [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The study relies primarily on changing the order of deposition of Pt and Fe, and on varying the amount of deposited Fe while leaving the Pt content unchanged. The required degree of control over the structure of the active phase(s) was achieved by an atmospheric pressure FB-CVD process shown recently to provide very reproducible results [7]. There are no reports in the literature of using atmospheric FB-CVD for the production of combined FeOx/Pt systems.…”

Section: Introductionmentioning

confidence: 99%

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On the Activity Enhancing Role of Iron Oxide for Noble Metal Oxidation Catalysts: A CVD-Based Study with Differently Structured Combinations of Pt and FeOx Coatings on Al2O3

et al. 2018

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Abstract:With regard to the catalysis of oxidation reactions by noble metals, the addition of FeO x to an Al 2 O 3 -supported Pt catalyst is known to be energetically more favorable compared to only Pt. In this work, different process routes for the preparation of such Fe-promoted Pt/Al 2 O 3 catalysts via atmospheric chemical vapor deposition (CVD) in a fluidized bed were explored. Specifically, the question of whether it would be advantageous to deposit the Fe before, along with, or after the Pt was addressed, and new information was obtained about the optimum FeO x -Pt interface and mixing ratio. Vapors of Trimethyl(methylcyclopentadienyl)platinum(IV) and/or Ethyl-ferrocene were injected into the bed from the top, permitting a quasi-lossless precursor operation and a very good control of the deposited metal, and hence of the catalyst structure. Samples could be extracted from the top while CVD was ongoing to obtain time-resolved data. The catalytic activity was determined through CO oxidation. The Fe-Pt mixing ratio was then varied for the most active deposition sequence, in order to identify an activity optimum generated by the minimum amount of Pt catalyst. When compared to pure Pt/Al 2 O 3 , the optimum catalyst consistently showed superior performance even after thermal stress.

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Section: Apparatus For Production Of Catalysts By Fluidized Bed Chemimentioning

confidence: 99%

“…this regard, CVD offers significant potential, due to its excellent reproducibility and control over the structure of the active phase(s) [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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