Platinum dissolution and

Yasuda K, Taniguchi A, Akita T, loroi T, Siroma Z. 2006b. Platinum dissolution and deposition in the polymer electrolyte membrane of a PEM fuel cell as studied by potential cycling. Phys Chem Chem Phys 8 746-752. 

Pt/C and PtCo/C catalysts High temperature operation effect on carbon corrosion, platinum dissolution, and sintering Arico et ai, 2008... 

Platinum catalyst Platinum dissolution and deposition on cathode, Pt diffusion in MEA, hydrogen permeation Bi and Fuller, 2008... 

Platinum catalyst Potential static holding conditions and potential step conditions effect on platinum dissolution and carbon corrosion Shao et al., 2008... 

The reasons for the deterioration of ceU performance can be distinguished in reversible and irreversible power loss. Inevitable irreversible performance loss is caused by carbon oxidation, platinum dissolution, and chemical attack of the membrane by radicals [7]. Reversible power loss can be caused by flooding of the cell, dehydration of the membrane electrode assembly (MEA), or change of the catalyst surface oxidation state [8]. If corrective actions are not started immediately, reversible effects lead to irreversible power loss that we define as degradation. In this chapter, we focus on the degradation of the catalyst layer due to undesired side reactions. 

In summary, it can be concluded that platinum dissolution and catalyst particle growth are particularly fast during potential transients because of the delayed PtO formation. Furthermore, accelerated oxidation of the carbon support is observed under cycling conditions. These mechanisms result in cell degradation lowering the durability of the fuel cell significantly. 

This chapter is devoted to a review of material issues for HT-PEMFC components and is built on relevant evaluation of data from literature on membrane oxidation, acid loss, platinum dissolution, and carbon corrosion. Finally, the state-of-the-art durability of PBI-based fuel cells is summarized. For certain applications, like in mobile auxiliary power units exposed to severe vibrations and road dust or to maritime saline mists, the picture becomes more complicated and knowledge today is rather limited. 

Guilminot E, Corcella A, Chatenet M, Maillard F, Chariot F etal. (2007), Membrane and active layer degradation upon PEMFC steady-state operation I. Platinum dissolution and redistribution within the MEA , J. Electrochem. Soc., 154, B1106-B1114. DOI 10.1149/1.2775218. 

Although platinum is very stable in high oxidative conditions even with the presence of strong acid, platinum dissolution and migration have been observed in both PEMFCs and PEMELCs (Ferreira et al. 2005). Theoretical models have been proposed to predict the location of the precipitated platinum (Burlatsky et al. 2005). The location of the platinum has been successfully verified by varying reactant gas partial pressures (Zhang et al. 2007). 

Platinum Dissolution and Migration Platinum migration from the cathode of a PEFC occurs due to the following steps [75] ... 

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