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Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide

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Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide ( membrane-electrode-assembly-modification-by-zeolite-and-grap )

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Figure ‎6.8 Proton conductivity of standard MEA and 0.5 wt% F-MOR MEA at different methanol concentration 1.0 M, 2.0 M, and 4.0 M and 70°C in DMFC ........................ 162 Figure ‎6.9 Methanol crossover of F-MOR and standard MEA at different fuel cell temperature with 1.0 M methanol concentration in DMFC..........................................163 Figure ‎6.10 Methanol permeability of standard MEA vs 0.5 wt% F-MOR MEA through fuel cell temperature range and 1.0 M methanol concentration in DMFC ...................164 Figure ‎6.11 Experimental work result (a) Polarization curve and (b) power density of standard, 0.5 wt%F-MOR, and SULFO-MOR modified binding layer MEA in DMFC using 1.0 M methanol and temperature 70°C ...............................................................165 Figure ‎6.12 Polarization curve of F-MOR and SULFO-MOR MEAs at 70°C and 1.0 M in DMFC ....................................................................................................................... 166 Figure ‎6.13 Nyquist plot of 0.5 wt% F-MOR and 0.5 wt% SULFO-MOR MEAs at 70°C and 1.0 M methanol anode feed in DMFC....................................................................167 Figure ‎6.14 Proton conductivities of standard, 0.5 wt% F-MOR and SULFO-MOR MEAs through operating temperature range from 40°C to 70°C in DMFC.................168 Figure ‎6.15 Proton conductivities of standard, 0.5 wt% F-MOR, 0.5 wt% SULFO- MOR, and 1.0 wt% SULFO-MOR MEAs determined using impedance spectroscopy with a 1.0 M methanol feed at a range of operating temperatures (40°C-70°C) in DMFC ....................................................................................................................................... 169 Figure ‎6.16 Methanol crossover of standard, F-MOR, and SULFO-MOR MEAs at 70°C and 1.0 M methanol concentration in DMFC ............................................................... 170 Figure ‎6.17 Methanol crossover of standard, 0.5 wt% F-MOR, 0.5 wt% SULFO-MOR, and 1.0 wt% GO MEAs determined using linear sweep voltammetry with a 1.0 M methanol feed at 70°C operating temperature in DMFC ............................................. 171 Figure ‎6.18 Power density, methanol crossover, and proton conductivity of the standard MEA, F-MOR, and SULFO-MOR MEAs at 70°C and 1.0 M in DMFC.....................172 Figure ‎6.19 Proton conductivities and power density of standard, GO MEAs modified binding layer MEA loadings (0wt % to 1wt %) determined using impedance spectroscopy in DMFC at 70°C operating temperatures and 1 M methanol feed ........175 Figure ‎6.20 Modified binding layer MEA loadings (0wt % to 1wt %) determined using LSV in DMFC at 70°C operating temperatures and 1 M methanol feed......................177 Figure ‎6.21 Power density, methanol crossover, and proton conductivity of standard and GO modified binding layer MEAs loadings (0wt % to 1wt %) at 70°C and 1.0 M in DMFC ...........................................................................................................................178 Figure ‎6.22 DMFC selectivity plot for 1.0 M methanol concentration[148]................180 Figure ‎6.23 Power densities of modified binding layer MEAs in DMFC at different fuel cell operating temperature and 1M methanol concentration.........................................181 Figure ‎6.24 Power densities of modified binding layer MEAs in DMFC at different 70°C fuel cell operating temperature and different methanol concentration ................ 181 Sirhan AL-Batty Page 10

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