Abstract
The electrocatalytic behaviour of thermally prepared anhydrous RuO 2/Nafion® (prepared by pyrolysis of a RuCl 3 solution on a porous titanium substrate which is then pressed on to the membrane) and platinum/Nafion (prepared by in situ chemical precipitation of platinum particles obtained by treatment of the Pt-exchanged membrane with a NaBH 4 solution) composite electrodes is compared towards the hydrogen evolution reaction in solid polymer electrolyte (SPE) water electrolysis. The metal oxide based composites show moderate electrocatalytic activity compared with the platinum based composites. In contrast, they are not sensitive to poisoning by foreign metal deposition. The RuO 2 based composite electrodes can be alternative cathodic materials for SPE water electrolysers.
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