On the role of bismuth-based alloys in carbon-supported bimetallic Bi-Pd catalysts for the selective oxidation of glucose to gluconic acid (poster)

Wenkin, M;Renard, Charles;Ruiz, Patricio;Delmon, Bernard;Devillers, Michel
(1996) 4th International Symposium on Heterogeneous Catalysis and Fine Chemicals — Location: BASEL(Switzerland) (8.September.1996)

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Authors
  • Wenkin, M
    Author
  • Renard, CharlesUCLouvain
    Author
  • Ruiz, PatricioUCLouvain
    Author
  • Delmon, BernardUCLouvain
    Author
  • Devillers, MichelUCLouvain
    Author
Abstract
The formation of various Pd-Bi alloys on the surface of carbon-supported PdBi(10%wt)/C catalysts and their role in the catalytic oxidation of glucose to gluconic acid by oxygen were investigated. Supported catalysts characterized by different Bi/Pd ratios were prepared from Pd acetate and Bi oxoacetate, and activated upon thermal heating at 773 K under nitrogen. The pure Bi2Pd, BiPd and BiPd3 alloys were prepared from the same precursors upon thermal heating at 873 K, 973 K and 1123 K, respectively. The catalytic performances of the supported and unsupported catalysts for the above reaction were measured by keeping the palladium weight constant. The catalysts were characterized by XRD, XPS and BET. Bismuth losses from the catalysts in the reaction medium were analyzed by atomic absorption spectrometry after 4 h running. For the supported catalysts, the highest performances are observed for Bi/Pd equal to 1, and for Bi/Pd = 0.5 when the gluconic acid yields are normalized with respect to the initial or residual Bi amount, or to the catalyst mass. The most active alloy is Bi2Pd which is also the one that loses Bi at the largest extent.
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Wenkin, M., Renard, C., Ruiz, P., Delmon, B., & Devillers, M. (1996). On the role of bismuth-based alloys in carbon-supported bimetallic Bi-Pd catalysts for the selective oxidation of glucose to gluconic acid (poster). Studies in Surface Science and Catalysis, 108, 391-398. https://hdl.handle.net/2078.5/21937 (Original work published 1997)