José Marien

Electrochemistry of lanthanum and uranium chlorides in organic media: Deposition of lanthanum and uranium

Molten salts have been widely used for the electrochemical preparation of lanthanum and uranium metals at high temperature. In this paper we demonstrate the feasibility of a similar process in dimethylformamide (DMF) and in the mixture g-butyrolactone/tetrahydrofuran (g-BL/THF). The best conditions for the preparation were deduced from preliminary transient electrochemistry experiments and from secondary ions mass spectrometry (SIMS) measurements involving SIMS mappings and SIMS depth profile analyses.

Immobilization of Actinides by Electropolymerization of Acrylonitrile : Application to the Preparation of Alpha Spectroscopy Sources

By L. Martinot, M. Mertens, L. Lopes, C. Calberg, P. Faack, M. Krausch, J. Guillaume, G. Ghitti, J. Marien, J. Riga, R. Jérôme and J. Schrijnemackers 1 Laboratory of Analytical Chemistry and Radiochemistry, University of Liège, B6, Sart-Tilman, B-4000 Liège, Belgium 2 Center for Education and Research on Macromolecules, Liège, Belgium 3 National Fundation for Scientific and Technological Research, Lisboa, Portugal 4 Engineering High School of Brussels, Brussels, Belgium 5 Laboratory of Physical Chemistry of Surfaces, Liège, Belgium 6 Interdisciplinary Laboratory of Electron Spectroscopy, Namur, Belgium 7 Research and Development, Cockerill-Sambre, Liège, Belgium

Metal catalysts supported on texture-tailored carbon xerogels

Abstract Carbon materials issued from evaporative drying and pyrolysis of resoreinol-formaldehyde gels were used as metal catalyst supports. These carbons, whose pore texture and composition are controllable, lead to high metal dispersion. Moreover, pore texture control is a great advantage: diffusional limitations can be lowered, and even eliminated, by choosing an appropriate pore texture range.