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Title: Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts

Abstract

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.

Authors:
;  [1];  [2]; ;  [3]
  1. Univ. Federal do Rio de Janeiro (Brazil)
  2. CNRS, Villeurbanne (France). Lab. d`Application de la Chimie a l`Environnement
  3. CNRS, Villeurbanne (France). Inst. de Recherches sur la Catalyse
Publication Date:
OSTI Identifier:
687724
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 186; Journal Issue: 1; Other Information: PBD: 15 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 10 SYNTHETIC FUELS; PALLADIUM; COBALT; CHEMICAL ACTIVATION; REDUCTION; PALLADIUM ALLOYS; COBALT ALLOYS; SYNTHESIS GAS; METHANOL; SYNTHESIS

Citation Formats

Noronha, F.B., Schmal, M., Frety, R., Bergeret, G., and Moraweck, B. Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts. United States: N. p., 1999. Web. doi:10.1006/jcat.1999.2461.
Noronha, F.B., Schmal, M., Frety, R., Bergeret, G., & Moraweck, B. Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts. United States. doi:10.1006/jcat.1999.2461.
Noronha, F.B., Schmal, M., Frety, R., Bergeret, G., and Moraweck, B. Sun . "Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts". United States. doi:10.1006/jcat.1999.2461.
@article{osti_687724,
title = {Evidence of alloy formation during the activation of graphite-supported palladium-cobalt catalysts},
author = {Noronha, F.B. and Schmal, M. and Frety, R. and Bergeret, G. and Moraweck, B.},
abstractNote = {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.},
doi = {10.1006/jcat.1999.2461},
journal = {Journal of Catalysis},
number = 1,
volume = 186,
place = {United States},
year = {1999},
month = {8}
}