Zinc nitrate hexahydrate (Zn(NO3)2·6H2O, 99.99%), 2-methylimidazole (98%) and nitric acid (HNO3, 65–68%) were purchased from Aladdin. Perchloric acid (HClO4, 70–72%), sulfuric acid (H2SO4, A.R.), hydrochloric acid (HCl, 36–38%), acetic acid (CH3COOH, 99.5%), methanol (CH3OH, A.R.), ethanol (C2H5OH, A.R.), sodium nitrite (NaNO2, A.R.) and sodium acetate anhydrous (CH3COONa, A.R.) were purchased from Beijing Chemical Works. Tetraethyl orthosilicate (TEOS, C8H20O4Si, 99%) was obtained from Innochem. Ferrous acetate (Fe(C2H3O2)2, 95%) was purchased from J&K Chemicals. 1,10-phenanthroline and sodium hydroxide (NaOH, 95%) were obtained from Macklin. Commercial Pt/C (40 wt%) was obtained from BASF. Nafion alcohol (5 wt%, D520) was obtained from Aldrich. Nafion 211 membrane was obtained from DuPont. All chemicals were used without further purification. All aqueous solutions were prepared using deionized (DI) water with a resistivity of 18.2 MΩ.
Nafion 211 membrane
Manufactured by DuPont
Nafion 211 membrane is a thin, durable, and highly ion-conductive membrane made from a perfluorinated sulfonic acid polymer. It is designed for use in various electrochemical applications, serving as a critical component in devices such as fuel cells, electrolyzers, and sensors. The membrane's primary function is to facilitate the selective transport of ions while providing electrical insulation between electrodes.
Automatically generated - may contain errors
Lab products found in correlation
Acetic acid, by Beijing Chemical Works (1 mentions)
Ethanol, by Beijing Chemical Works (1 mentions)
Methanol, by Beijing Chemical Works (1 mentions)
Hydrochloric acid (hcl), by Beijing Chemical Works (1 mentions)
Sulfuric acid, by Beijing Chemical Works (1 mentions)
Sodium nitrite, by Beijing Chemical Works (1 mentions)
Sodium hydroxide (naoh), by Maclin Biochemical Technology (1 mentions)
Nafion solution, by DuPont (1 mentions)
4 protocols using nafion 211 membrane
1
Synthesis of Pt/C Catalyst using Zinc Nitrate
2
Fabrication of Daikon-Based Catalyst MEAs
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First, 15 mg cathode catalyst powders (Daikon-NH3-900 or Daikon-Ar-900) were dispersed in the mixture of 0.5 mL distilled H2O, 1.0 mL isopropanol and 300 mg 5 wt% Nafion solution by ultra sonication and stirring. Then the cathode catalyst ink was coated on the 5.0 cm2 cathode carbon paper (ElectroChem Inc, Carbon Micro-porous Layer (CMPL)) with a brush. Commercial Hispec 4100 Pt/C catalyst was used in the anode. The anode catalyst ink was prepared by the same method, and then brush coated on the anode carbon paper. The catalyst (Daikon-NH3-900 or Daikon-Ar-900) loadings in the cathode were 3.0 mg/cm2 and Pt loadings in the anodes were 1.0 mg/cm2, respectively. MEAs were fabricated by hot pressing the cathode, DuPont Nafion 211 membrane and the anode together under the pressure of 60lb cm−2 at 130°C for 2 min.
3
Membrane Electrode Assembly Fabrication
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The MEAs were prepared by decal transfer technique. The ink was prepared by dispersing Pt/C catalysts in DI water with Nafion solution (20 wt. %, DuPont) and isopropanol. Pt (29 wt. %) /VC (TEC10V30E) and Pt (46.7 wt. %) /VC (TEC10V50E) were used for anode and cathode ink respectively. Catalyst ink was sprayed on decal substrate after a ball-milling for 12 h, and dried to form the catalyst layers. The anode and cathode were hot pressed on either side of a Nafion 211 membrane (DuPont) at 145 °C and 1.5 MPa for 3–4 min to fabricate a 25 cm2 MEA for the single cell. Nafion ionomer content in the anode and cathode was 20 wt. % and 25 wt. % respectively. Pt loading was 0.05 mg cm−2 for anode and 0.4 mg cm−2 for cathode.
4
Fabrication of 30% Nafion Fuel Cell
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Catalyst ink for 30% nafion electrodes was made by ultrasonically mixing the catalyst, deionized water, isopropanol, and 5wt% Nafion ionomer solution for 1h. Then the catalyst slurry was applied to the carbon paper by spraying to form the cathode catalyst layer with loading of 0.03 mgPt cm−2. As for anode, t/C (20 wt. % of Pt, JM Hispec3000) was used with loading of 0.1 mgPt cm−2. The prepared cathode and anode were pressed onto the two sides of a Nafion 211 membrane (DuPont) at 120 °C to obtain the membrane electrode assembly. The geometric area of the MEA was 12.25 cm2. The fuel cell performance was measured with 850e Fuel Cell Test Station. The gases were humidified at 80 °C with the flow rate of 0.6 L min-1 for H2 and 2.6 L min-1 for O2. The absolute pressure was 1.0 bar for H2 and 0.5–2 bar for O2.
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