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Membraneless Hydrogen Peroxide Fuel Cells as a Promising Clean Energy Source
Published on: October 20, 2023
Hydrogenase electrodes for fuel cells
A A Karyakin1, S V Morozov, E E Karyakina
1Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia. karyakin@chem.msu.ru
Abstract:
Considering crucial problems that limit use of platinum-based fuel cells, i.e. cost and availability, poisoning by fuel impurities and low selectivity, we propose electrocatalysis by enzymes as a valuable alternative to noble metals. Hydrogenase electrodes in neutral media achieve hydrogen equilibrium potential (providing 100% energy conversion), and display high activity in H(2) electrooxidation, which is similar to that of Pt-based electrodes in sulphuric acid. In contrast with platinum, enzyme electrodes are highly selective for their substrates, and are not poisoned by fuel impurities. Hydrogenase electrodes are capable of consuming hydrogen directly from microbial media, which ensures their use as fuel electrodes in treatment of organic wastes.
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