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  Sintering of platinum-black in hydrogen: Morphology and catalytic activity

Paál, Z., Zimmer, H., Günter, J. R., Schlögl, R., & Muhler, M. (1989). Sintering of platinum-black in hydrogen: Morphology and catalytic activity. Journal of Catalysis, 119(1), 146-160. Retrieved from http://dx.doi.org/10.1016/0021-9517(89)90142-5.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-2326-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-2327-4
Genre: Journal Article

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 Creators:
Paál, Zoltan, Author
Zimmer, Helga, Author
Günter, John R., Author
Schlögl, Robert1, Author              
Muhler, Martin2, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Platinum black; High-resolution EM Platinum in Catalysis
 Abstract: Pt-black (Pt-473 and Pt-633) reduced in aqueous solution with HCHO was sintered at 473 and 633 K in hydrogen. Electron micrographs show a considerable sintering, especially at 633 K. High-resolution EM indicates the presence of agglomerates of rounded crystals; lattice fringes are also seen. Samples sintered at different temperatures show identical catalytic activity in ring opening and aromatization of alkylcyclopentanes; their activity was also similar in bond-shift isomerization of heptane isomers. On the other hand, aromatization, hydrogenolysis, and C5-cyclic isomerization were more rapid on Pt-473, while C5-cyclization was more rapid on Pt-633. These effects are discussed in terms of various active sites for these skeletal reactions and their abundance on two samples which have different morphology, hence different hydrogen retention ability; also the chemical state of their carbon impurity may be different.

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Language(s): eng - English
 Dates: 1989
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: Journal of Catalysis
  Alternative Title : J. Catal.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 119 (1) Sequence Number: - Start / End Page: 146 - 160 Identifier: -