Abstract
In developing implantable biofuel cells to generate higher power it is essential to prepare very thin and highly active electrodes in order to produce the required energy in as small a volume as possible. A method has been developed for glucose electrodes which enables us to produce firmly adhering active layers on very thin foils (up to 50 μn) of homogeneous alloys, containing platinum and a ferrous metal, by controlled anodic dissolution of the non-noble metal. Such electrodes are roughly 10 to 20 times more active than conventional glucose anodes. The activity is remarkably increased by the addition of tungsten and tantalum to the alloy. So far it has been possible to transfer 17 out of the 24 available electrons of the glucose molecule.
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