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Method and characterisation Finally, the GDL was sintered at 360°C for one hour with a ramping temperature of 1°C per minute in a muffle furnace. Figure 3.21 GDL sintered temperature profile in the muffle furnace 3.4.2 Anode Catalyst Layer Preparation The standard platinum loading on the electrode was 1.0 mg/cm2. The catalyst used was 60% Pt:Ru alloy [Pt:40%, Ru:20%, Carbon support (ETEK):40%]. (Detailed calculation in appendix c) Preparing Catalyst Ink: 1.429 g of Nafion 117 (5% in a mixture of lower aliphatic alcohols and water) solution was placed in into vial. 15 ml of acetone was added into the vial and sonicated for ten minutes until the mixture was clear. 0.405 g of catalyst (Pt:Ru 60%) was added to the mixture and sonicated for one hour. Spraying catalyst ink on GDL: Anode electrode was weighed via a digital balance and the number of grams of catalyst was needed for loading (one electrode) on the GDL was 0.0506 g. Following the same steps used in spraying carbon ink (section 4.3.1 part (b)), the catalyst was sprayed without using a hotplate. The amount of catalyst ink was 0.5 ml. Sirhan AL-Batty Page 98PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide
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