Oxygen reduction reaction parameters

Neyerlin KC, Gu W, Jome J, Gasteiger HA. 2006. Determination of catalyst unique parameters for the oxygen reduction reaction in a PEMFC. J Electrochem Soc 153 A1955-A1963. 

In practice, in all fuel cells that involve the utilization of 02 from air (Section 13.4.5), the oxygen reduction reaction [Eqs. (13.4) and (13.24)] is always rate determining for terrestrial applications. One can seejust how important it is to attempt to develop electrocatalysts for the cathodes of fuel cells on which the enhanced current density is high and Tafel slope is low and the efficiency of energy conversion, therefore, maximal. The direct relation of the mechanism of oxygen reduction and the associated Tafel parameters to the economics of electricity production and transportation is thus clearly seen. 

Anastasijevic NA, Vesovic V, Adzic RR. Determination of the kinetic parameters of the oxygen reduction reaction using the rotating ring-disk electrode part I. Theory J Electroanal Chem Interfacial Electrochem 1987 229 305-16. 

TABLE 4.2.7 Kinetic Parameters for the Oxygen Reduction Reaction in Acid and Alkaline Solutions... 

Fouda-Onana F, Bah S, Savadogo O (2009) Palladium-copper alloys as catalysts fra the oxygen reduction reaction in an acidic media I Correlation between the ORR kinetic parameters and intrinsic physical properties of the alloys. J Electroanal Chem 636(1-2) 1-9... 

The diffusion and concentration of oxygen are important parameters from the oxygen reduction reaction point of view. Thus, the calculation of these parameters in ionic liquids can be obtained using different methodologies reported in the literature. 

More recently, Wang et al. [28] derived an intrinsic kinetic equation for the four-electron (4e ) oxygen reduction reaction (ORR) in acidic media, by using free energies of activation and adsorption as the kinetic parameters, which were obtained through fitting experimental ORR data from a Pt(lll) rotating disk electrode (RDE). Their kinetic model consists of four essential elementary reactions (1) a dissociative adsorption (DA) (2) a reductive adsorption (RA), which yields two reaction intermediates, O and OH (3) a reductive transition (RT) from O to OH and (4) a reductive desorption (RD) of OH, as shown below [28] (Reproduced with permission from [28]). 

Anastasijevic, N., Vesovic, V. and Adzic, R. (1987). Determination of the Kinetic Parameters of the Oxygen Reduction Reaction Using the Rotating Ring-disk Electrode Part 1. Theory, J. Electroanal Chem., 229, pp. 305-316. 

Pathways, mechanisms, and corresponding kinetic parameters of the ORR have been discussed in the section Electrocatalysis of the Oxygen Reduction Reaction at Platinum. In a highly simplified picture, derived originally on the basis of a series of experimental studies by Damjanovic and coworkers (Damjanovic, 1992 Gatrell and MacDougall, 2003 Sepa et al., 1981,1987), it was proposed that the rate-determining reaction step is the initial adsorption. 

Parirni NS, Umasankar Y, Atanassov P, Ramasamy RP. Electrochemical kinetic and mechanistic parameters of laccase-catalyzed oxygen reduction reaction. ACS Catal 2012 2 38-44. 

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