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.

Inactive Publication Date: 2014-09-03
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PdAg / TiO 2 Nanotube electrodes can be used as sensors or direct methanol fuel cell anodes, which have good catalytic performance and anti-CO poisoning performance for methanol, which have not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a direct methanol fuel cell PdAg/TiO2 nanotube electrode and a preparation method thereof. The PdAg/TiO2 nanotube electrode is formed in a manner that a positive pole of a titanium plate is oxidized to form nanotubes on the surface, and a nanometer PdAg alloy is deposited though electroplating. After the positive pole of the titanium plate is oxidized by roasting, a thin layer of TiO2 nanotubes with high specific surfaces is formed on the surface of the titanium plate, the electrical conductivity of the TiO2 nanotubes is improved by the PdAg alloy deposited on the surface of the TiO2 nanotubes in an electroplating manner, and a catalytic oxidation of TiO2 on methyl alcohol is greatly improved through the synergistic effect of the PdAg alloy on TiO2; meanwhile, intermediate products, such as CO, generated by methyl alcohol oxidation are adsorbed and transferred to the surfaces of the PdAg/TiO2 nanotubes and are deeply oxidized to obtain a final product CO2, and a CO toxicity resisting capacity of the catalyst is improved; the price of PdAg is lower than that of noble metals such as Pt and Ru, and the dosage of PdAg in the PdAg/TiO2 nanotubes is small, so that the cost of the catalyst is greatly reduced; the PdAg/TiO2 nanotube electrode is utilized as a direct methanol fuel cell anode, and the property of the cell is improved.

Description

[0001] technical field [0002] The present invention relates to direct methanol fuel cell PdAg / TiO 2 Nanotube electrode and its preparation method. [0003] Background technique [0004] Direct Methanol Fuel Cell (DMFC) has the advantages of low energy consumption, high energy density, abundant sources of methanol, low price, simple system, convenient operation and low noise, and is considered to be the most promising future vehicle power and other vehicles. Promising chemical power sources have attracted widespread attention. One of the most critical materials of DMFC is the electrode catalyst, which directly affects the performance, stability, service life and manufacturing cost of the battery. The noble metal Pt has excellent catalytic performance at low temperature (less than 80°C). At present, the electrode catalysts of DMFC all use Pt as the main component, and the PtRu catalyst has stronger CO poisoning resistance and higher catalytic activity than pure Pt. It is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCY02E60/50H01M4/8803H01M4/925
Inventor 鞠剑峰石玉军高强吴东辉苏广均华平李建华
Owner NANTONG UNIVERSITY
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