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Direct methanol alkaline fuel cell (DMAFC) performance using various amounts of ZIF-8 in PVA electrolyte: (a) voltage; (b) power density as a function of current density at 30 °C; and (c) voltage; (d) power density at 60 °C. Gas diffusion electrodes: catalysts of 2 mg cm−2 Pt–Ru (1:1) for anode and 1 mg cm−2 Pt for cathode. Anode fuel: 2 M methanol + 6 M KOH at a flow rate of 5 mL min−1. Cathode fuel: humidified oxygen at a flow rate of 100 mL min−1.
