ELECTROCHEMICAL REDUCTION OF METAL SALTS AS A METHOD OF PREPARING HIGHLY DISPERSED METAL COLLOIDS AND SUBSTRATE FIXED METAL CLUSTERS BY ELECTROCHEMICAL REDUCTION OF METAL SALTS

摘要

The object of the invention is a method for the electrochemicalpreparation of metal colloids with particle sizes of less than30 nm, characterized in that one or more metals of groups Ib,IIb, III, IV, V, VI, VIIb, VIII, lanthanoides, and/or actinoidesof the periodic table are cathodically reduced in the presenceof a stabilizer, optionally with a supporting electrolyte beingadded, in organic solvents or in solvent mixtures of organicsolvents and/or water within a temperature range of between -78°Cand +120°C to form metal colloidal solutions or redispersiblemetal colloid powders, optionally in the presence of inertsubstrates and/or soluble metal salts of the respective metals.The invention further relates to soluble or redispersiblecolloids as well as application on substrates and immobilizationthereof, in particular for the preparation of catalysts.