Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts
- Univ. Federal do Rio de Janeiro (Brazil)
- CNRS, Villeurbanne (France). Lab. d`Application de la Chimie a l`Environnement
- CNRS, Villeurbanne (France). Inst. de Recherches sur la Catalyse
Magnetism, XRD, and EXAFS analyses were used to study the formation of a solid solution on Pd-Co/G catalysts during reduction treatment. After reduction at 773 K, magnetic measurements revealed the formation of a Pd-Co alloy. XRD analysis in situ allowed one to follow the alloy process during the increase of the reduction temperature. The XRD results showed the presence of a heterogeneous solid solution after reduction at 773 K. Pd and Co K-edge EXAFS analysis confirmed that bimetallic particles with a palladium- and cobalt-rich phase were formed. The formation of a solid solution decreased the adsorption strength of 1,3-butadiene on new Pd sites modified by Co. Palladium-cobalt catalysts are useful for methanol and ethanol formation from synthesis gas at high pressure.
- OSTI ID:
- 687724
- Journal Information:
- Journal of Catalysis, Vol. 186, Issue 1; Other Information: PBD: 15 Aug 1999
- Country of Publication:
- United States
- Language:
- English
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