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Fuel Cells - Fundamentals and Applications

“…It was seen, however, that the addition of WO 3 only induces an increase in electrochemically active surface area, which accounts for the increase in performance [142]. A model for PAFC cathodes is described in the literature [143,144]. Pt-Ru catalysts were found to be better than Pt catalysts for hydrogen oxidation when using reformate hydrogen (see further) as it contains CO which is more easily oxidised with Ru as a secondary metal.…”

Acid‐Functionalized Mesostructured Aluminosilica for Hydrophilic Proton Conduction Membranes

“…[23] Acid-base polymer membranes, such as H 3 PO 4 -doped polybenzimidazole (PBI), exhibit proton conductivity values up to 0.13 S cm -1 at 160°C. [25] However, PBI-H 3 PO 4 membranes similarly attain high proton conductivities at high acid-doping levels and high temperatures, conditions under which the membranes also exhibit swelling and poor mechanical properties. [23,24] By comparison, inorganic-organic composite membranes, such as those containing hydrophilic zeolite, silica, or titania particles introduced into Nafion ® or other polymers tend to retain more water, with modest improvements in their proton conductivities.…”

Phosphoric Acid-doped SDF-F/poly(VI-co-MPS)/PTFE Membrane for a High Temperature Proton Exchange Membrane Fuel Cell

“…This is a typical phenomenon of an aciddoped membrane since the rate of reaction on the electrode and the proton conductivity of membrane are enhanced as the cell temperature increases. 28,29 The power densities of SDF-F/poly(VI-co-MPS)/PTFE membrane at 0.60 V were 286, 302, and 320 mW cm −2 at 150, 170, and 190°C, respectively. This power density of SDF-F/poly(VI-co-MPS)/PTFE membrane is higher than that of SDF-F/PVI/PTFE membrane (263.5 mW cm −2 at the temperature of 150°C…”