Preparation and Characterization of 6-Molybdocobaltate and 6-Molybdoaluminate Cobalt Salts.Evidence of a New Heteropolymolybdate Structure

摘要

Molybdenum and cobalt based heteropolyanions(HPAs)could be used as an alternative to the conventional ammonium heptamolybdate and cobalt nitrate starting materials for friendly environmental preparation of Co-Mo/ AI_20_3 hydrotreating catalysts.In this aim,cobalt salts of molybdocobaltate and molydboaluminate Anderson HPAs have been synthesized and characterized by TGA,XRD,XAS,and vibrational spectroscopies.The crystal structure refinement provided evidence for the formation of a new heteropolyoxomolybdate derived from the well-known Anderson structure.