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Redox couple fuel cell catalysts

Wilkinson and coworkers [40, 41] introduced the concept of a mixed-reactant direct liquid fuel cell where the air cathode was substituted with a metal-ion redox couple. This type of cell, which in the case of methanol is called mixed-reactant direct methanol redox fuel cell (MR-DMRFC) has the advantage of cathode selectivity, avoiding Pt group metals as cathodic catalysts, minimize flooding in the cathode and allows the use of larger fuel concentrations. [Pg.17]

Obviously, the different types of interaction will lead to different kinetics and mechanisms, and different proportions of water to peroxide in the reaction product. Much has been written and speculated about these different interactions and the influence of metal d-orbital characteristics on the overall ORR. Reviews covering this aspect of the subject can be found in references such as [103] and [105]. On the whole, these conclusion can be drawn from the significant body of research on this topic (a) Fe and Co macrocyclic complexes appear to constitute the best catalysts for oxygen reduction (b) Ir complexes also appear to be quite active (c) the redox potential for the metal ion couple plays a major role in dictating the activity of the ORR, with optimal redox potentials existing for maximum activity (d) many of the non-noble metal catalysts lack the long-term stability needed for practical fuel cell applications and (e) heat treatment of supported non-noble metal catalysts tends to increase both their activity towards oxygen reduction and their stability, but optimum heat treatments achieve the best balance of the two. [Pg.475]


See other pages where Redox couple fuel cell catalysts is mentioned: [Pg.424]    [Pg.427]    [Pg.345]    [Pg.464]    [Pg.95]    [Pg.385]    [Pg.404]    [Pg.28]    [Pg.401]    [Pg.404]    [Pg.2103]    [Pg.475]    [Pg.1170]    [Pg.37]    [Pg.607]    [Pg.29]    [Pg.253]    [Pg.139]    [Pg.448]    [Pg.18]   
See also in sourсe #XX -- [ Pg.102 ]




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Catalyst fuel cell

Catalysts cells

Cells couples

Fuel catalysts

Fuel cells cell catalysts

Redox catalysts

Redox cells

Redox couples

Redox coupling

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