(DE3781930-G)      A catalyst combination (I) comprises: an electrocatalyst(II) and a homogeneous cocatalyst (III). (I) is catalytic means for reducing positively charged ions (IV) at a cathode in an electrocatalytic or mediated process of treating organic waste material (V) in an aq. electrolyte. (IV) are H and/or metal ions.    The above organic waste treatment process involves maintaining an electric potential across an electrochemical cell contg. (V), electrolyte and (I), and (IV) are reduced at the cathode. An aq. electrolytic compsn. contg. (I), and a reaction compsn. contg. this electrolyte compsn and organic material are also claimed.    USE/ADVANTAGE -   A method is provided for reducing the energy required for producing H2 or electrowinning of metals by reacting organic material electrochemically using (I) (Claimed). An increase in reaction rates by using (I) also provides energy saving economy. Suitable (V) materials include, coal, woody wastes, sewage sludge, industrial chemical waste food, and grown biomass prods., e.g. bulk grass plants or water plants.    (JP2717535-B2)      A catalyst combination (I) comprises: an electrocatalyst(II) and a homogeneous cocatalyst (III). (I) is catalytic means for reducing positively charged ions (IV) at a cathode in an electrocatalytic or mediated process of treating organic waste material (V) in an aq. electrolyte. (IV) are H and/or metal ions.    The above organic waste treatment process involves maintaining an electric potential across an electrochemical cell contg. (V), electrolyte and (I), and (IV) are reduced at the cathode. An aq. electrolytic compsn. contg. (I), and a reaction compsn. contg. this electrolyte compsn and organic material are also claimed.    USE/ADVANTAGE -   A method is provided for reducing the energy required for producing H2 or electrowinning of metals by reacting organic material electrochemically using (I) (Claimed). An increase in reaction rates by using (I) also provides energy saving economy. Suitable (V) materials include, coal, woody wastes, sewage sludge, industrial chemical waste food, and grown biomass prods., e.g. bulk grass plants or water plants.