B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/46 (2006.01) B01J 23/40 (2006.01) B01J 32/00 (2006.01) B01J 37/00 (2006.01) B01J 37/03 (2006.01) H01M 4/92 (2006.01) B01J 23/42 (2006.01) H01M 4/86 (2006.01)
Patent
CA 2387379
The invention provides a process for preparing a platinum-ruthenium catalyst and the catalyst prepared therewith. The catalyst can be supported on a support material in powder form or may also be unsupported. To prepare the supported catalyst, the support material is suspended in water and the suspension is heated to at most the boiling point. While keeping the temperature of the suspension the same, solutions of hexachloroplatinic acid and ruthenium chloride are then added to the suspension, then the pH of the suspension is increased to a value between 6.5 and 10 by adding an alkaline solution and the noble metals are thus precipitated onto the support material. Afterwards, one or more organic carboxylic acids and/or their salts are added to the suspension and the catalyst is chemically reduced, washed, dried and optionally subsequently calcined under an inert or reducing atmosphere at a temperature between 300 and 1000 °C. The catalyst is characterised by a high tolerance to carbon monoxide poisoning in the fuel cell.
Biberbach Peter
Mcintosh Ralph
Ruth Karsten
Starz Karl-Anton
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Omg Ag & Co. Kg
Umicore Ag & Co. Kg
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