Direct methanol fuel cell PdAg/TiO2 nanotube electrode and preparation method thereof
A methanol fuel cell and nanotube technology is applied in battery electrodes, circuits, electrical components, etc. to reduce costs, improve CO poisoning resistance, and improve battery performance.
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Embodiment 1
[0012] (1) Pretreatment of titanium plate: Polish the titanium plate with metallographic sandpaper, ultrasonically degrease in acetone for 15 minutes, wash with methanol or ethanol, treat with 1 mol / L HF for 10 minutes, ultrasonically clean 3 times with twice distilled water, and dry .
[0013] (2) TiO 2 Preparation of nanotube / Ti: Anodize the treated titanium plate in electrolyte. Composition of electrolyte: 0.5%-1% HF, 1mol / L H 2 SO 4 . The electrolysis potential was 20 V, and the electrolysis time was 30 minutes. After electrolysis, wash with deionized water, dry, and roast in a muffle furnace at 500-600 ° C for 3 hours to obtain TiO 2 Nanotube / Ti.
[0014] (3) PdAg / TiO 2 Preparation of nanotube electrodes: the prepared TiO 2 The nanotube / Ti was electroplated as the cathode, and the volume of the plating solution was 50 mL. The composition of the plating solution:
[0015] AgNO 3 0.01mol / L
[0016] Pd(NO 3 ) 2 0.01mol / L
[0017] h ...
Embodiment 2
[0024] (1) Pretreatment of titanium plate: Polish the titanium plate with metallographic sandpaper, ultrasonically degrease in acetone for 15 minutes, wash with methanol or ethanol, treat with 1 mol / L HF for 10 minutes, ultrasonically clean 3 times with twice distilled water, and dry .
[0025] (2) TiO 2 Preparation of nanotube / Ti: Anodize the treated titanium plate in electrolyte. Composition of electrolyte: 0.5%-1% HF, 1mol / L H 2 SO 4 . The electrolysis potential was 20 V, and the electrolysis time was 120 minutes. After electrolysis, wash with deionized water, dry, and roast in a muffle furnace at 500-600 ° C for 3 hours to obtain TiO 2 Nanotube / Ti.
[0026] (3) PdAg / TiO 2 Preparation of nanotube electrodes: the prepared TiO 2 The nanotube / Ti was electroplated as the cathode, and the volume of the plating solution was 50 mL. The composition of the plating solution:
[0027] AgNO 3 0.01mol / L
[0028] Pd(NO 3 ) 2 0.01mol / L
[0029] h 3...
Embodiment 3
[0036] (1) Pretreatment of titanium plate: Polish the titanium plate with metallographic sandpaper, ultrasonically degrease in acetone for 15 minutes, wash with methanol or ethanol, treat with 1 mol / L HF for 10 minutes, ultrasonically clean 3 times with twice distilled water, and dry .
[0037] (2) TiO 2 Preparation of nanotube / Ti: Anodize the treated titanium plate in electrolyte. Composition of electrolyte: 0.5%-1% HF, 1mol / L H 2 SO 4 . The electrolysis potential was 20 V, and the electrolysis time was 60 minutes. After electrolysis, wash with deionized water, dry, and roast in a muffle furnace at 500-600 ° C for 3 hours to obtain TiO 2 Nanotube / Ti.
[0038] (3) PdAg / TiO 2 Preparation of nanotube electrodes: the prepared TiO 2 Nanotube / Ti was used as cathode for electroplating. The composition of the plating solution:
[0039] AgNO 3 0.01mol / L
[0040] Pd(NO 3 ) 2 0.01mol / L
[0041] h 3 BO 3 20g / L
[0042] pH: 4.4...
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