Platinum oxygen reduction

Zhang J, Sasaki K, Sutter E, Adzic RR. 2007b. Stabilization of platinum oxygen reduction electrocatalysts using gold clusters. Science 315 220-222. 

Zhang, J., K. Sasaki, E. Sutter, and R. R. Adzic. Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold Clusters. Sci-... 

Pylypenko S, Mukherjee S, Olson TS, Atanassov P (2008) Non-platinum oxygen reduction electrocatalysts based on p5oolyzed transition metal macrocycles. Electrochim Acta 53 7875-7883... 

Figure 13.7. Polarization curves for O2 reduction reaction on Au/Pt/C (A) and Pt/C (C) catalysts on a rotating disk electrode, before and after 30,000 potential cycles. Sweep rate 10 mV/s rotation rate 1600 rpm. Voltammetric curves for Au/Pt/C (B) and Pt/C (D) catalysts before and after 30,000 cycles sweep rates 50 and 20 mV/s, respectively. The potential cycles were from 0.6 to 1.1 V in an 02-saturated 0.1 M HCIO4 solution at room temperature. For aU electrodes, the Pt loading was 1.95 mg (or 10 nmol) on a 0.164 cm glassy carbon rotating disk electrode. The shaded area in (D) indicates the lost Pt surface area [31]. (From Zhang J, Sasaki K, Sutter E, Adzic RR. Stabilization of platinum oxygen-reduction electrocatalysts using gold clusters. Science 2007 315 220-2. Reprinted with permission from AAAS.)...

Zhang, J., Sasaki, K., Sutter, E., and Adzic, R.R. (2007) Stabilization of platinum oxygen-reduction electrocatalysts... 

There is also scope for use of nanoparticulate Au-Pt catalysts in the fuel cells themselves [47]. Work at Brookhaven National Laboratory in New York has shown that platinum oxygen-reduction fuel cell electrocatalysts can be stabilized against dissolution under potential cycling regimes (a continuing problem in vehicle applications) by modifying Pt nanoparticles with gold clusters. 

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