GENESIS OF THE METALLIC PHASE IN A HIGHLY DISPERSED CATALYST FORMED FROM Pt ACETYLACETONATE ON ALUMINA J. BERDALA, E. FREUND et J.P. LYNCH J. Phys. Colloques, 47 C8 (1986) C8-265-C8-268 DOI: 10.1051/jphyscol:1986849