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 H2 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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February 2005
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Conference Article|
February 01 2005
Hydrogenase electrodes for fuel cells
A.A. Karyakin;
A.A. Karyakin
1
*Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
1To whom correspondence should be addressed (email Karyakin@chem.msu.ru).
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S.V. Morozov;
S.V. Morozov
*Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
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E.E. Karyakina;
E.E. Karyakina
*Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
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N.A. Zorin;
N.A. Zorin
†Institute for Basic Biological Problems, Russian Academy of Science, 142190, Moscow region, Puschino, Russia
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V.V. Perelygin;
V.V. Perelygin
‡State Research Center for Applied Microbiology, 142279, Obolensk, Russia
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S. Cosnier
S. Cosnier
§LEOPR, UMR CNRS 5630, Université Joseph Fourier BP 53, 38041 Grenoble Cedex 9, France
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Publisher: Portland Press Ltd
Received:
October 28 2004
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2005 The Biochemical Society
2005
Biochem Soc Trans (2005) 33 (1): 73–75.
Article history
Received:
October 28 2004
Citation
A.A. Karyakin, S.V. Morozov, E.E. Karyakina, N.A. Zorin, V.V. Perelygin, S. Cosnier; Hydrogenase electrodes for fuel cells. Biochem Soc Trans 1 February 2005; 33 (1): 73–75. doi: https://doi.org/10.1042/BST0330073
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