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Nafion membranes degradation

Chen, C., Levitin, G., Hess, D. W., and FuUer, T. F. 2007. XPS investigation of Nafion membrane degradation. Journal of Power Sources 169 288-295. [Pg.103]

Chen C, Fuller TF (2009) The effect of humidity on the degradation of Nafion membrane. Polym Degrad Stabil 94 1436-1447... [Pg.100]

Degradation of Orange II on catalytic Fe/Nafion membranes. Static and reactor processes... [Pg.1082]

In photo-reactors provided with a Fe/Nafion membrane, the degradation up to bio-compatibility of Orange II proceeds at an acceptable kinetic rate only up to pH 4.7 [3]. The long-lived intermediates of the degradation were observed to be bio-degradable compared to Orange n which is not bio-degradable. [Pg.1083]

L. Ghassemzadeh, K.-D. Kreuer, J. Maier, K. MueUer, Chemical degradation of NAFION membranes under mimic fuel cell conditions as investigated by sohd-state NMR spectroscopy, J. Phys. Chem. C 114 (2010) 14635—14645. [Pg.214]

Jao TC, Ke ST, Chi PH et al (2010) Degradation on a PTFE/Nafion membrane electrode assembly with accelerating degradation technique. Int J Hydrogen Energy 35 6941-6949... [Pg.271]

Increased temperatures have a strong correlation to some of the key degradation mechanisms. Membrane degradation due to chemical mechanisms as indicated by fluoride release rate has been shown to follow an Arrhenius relationship with temperature, with an increase of 1.8 times for a 10 °C rise. Figure 6.4 shows the relationship between temperature and the fluoride release rate as measured in the cathode and anode effluent at open-circuit voltage operation for an MEA containing DuPont Nafion 112 membrane. This trend is consistent with data reported in the Uterature, e.g. Madden et al. (2009). Sethuraman et al. (2008) showed the effect of temperature on lifetime at open-circuit voltage and found a lifetime of -500 h at 80 °C was dramatically decreased to -60 h at 100 °C and only -30 h at 120 °C (Sethuraman et al., 2008). [Pg.158]

FIGURE 3.9 XPS of the C Is spectra of MEAs constructed with Nafion membrane and Pt/C catalyst before and after 300 h of operation. (Reprinted from Electrochimica Acta, 54, Zhang, F. Y. et al. Quantitative characterization of catalyst layer degradation in PEM fuel cells by x-ray photoelectron spectroscopy, 4025-4030, Copyright (2009), with permission from Elsevier.)... [Pg.49]


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See also in sourсe #XX -- [ Pg.8 ]




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