Metalloporphyrins oxygen reduction

METALLOPORPHYRIN CATALYSTS OF OXYGEN REDUCTION COoH COgH... 

E25.17 Electrocatalysts are compounds that are capable of reducing the kinetic barrier for electrochemical reactions (barrier known as overpotential). While platinum is the most efficient electrocatalyst for accelerating oxygen reduction at the fuel cell cathode, it is expensive (recall Section 25.18 Electrocatalysis). Current research is focused on the efficiency of a platinum monolayer by placing it on a stable metal or alloy clusters your book mentions the use of the alloy PtsN. An example would be a platinum monolayer fuel-cell anode electrocatalyst, which consists of ruthenium nanoparticles with a sub-monolayer of platinum. Other areas of research include using tethered metalloporphyrin complexes for oxygen activation and subsequent reduction. 

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Okunola AO, Nagaiah TC, Chen X, Eckhard K, Schuhmaim BM (2009) Visualization of local electrocatalytic activity of metalloporphyrins towards oxygen reduction by means of redox competition scanning electrochemical microscopy (RC-SECM). Electrochim Acta 54(22) 4971 978... 

Sun S, Jiang N, Xia D (2011) Density functional theory study of the oxygen reduction reaction on metalloporphyrins and metallophthalocyanines. J Phys Chem C 115(19) 9511-9517... 

Jiang L, Li M, Lin L, li Y, He X, Cui L. Electrocatalytic activity of metalloporphyrins grown in situ on graphene sheets toward oxygen reduction reaction in an alkaline medium. RSC Adv 2014 4 26653-61. 

Masa J, Schuhmann W (2013) Systematic selection of metalloporphyrin-based catalysts for oxygen reduction by modulation of the donor-acceptor intermolecular hardness. Chem Eur J 19 9644-9654... 

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