A phosphoric acid functionalized carbon nanotube-supported platinum catalyst for direct methanol fuel cells and its preparation method
A technology of methanol fuel cell and carbon nanotubes, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to solve problems of poor stability and low current density Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0041] See figure 1 , A preparation method of phosphoric acid functionalized carbon nanotube-supported platinum catalyst for direct methanol fuel cell, comprising the following steps:
[0042] 1) Preparation of oxidized carbon nanotubes: add carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid and stir at a temperature of 30-80 ℃, and reflux for 2-6 hours while stirring; then cool, dilute, filter, and use Washing with hydrochloric acid, washing with water, and vacuum drying at a temperature of 70 ℃ to obtain carbon oxide nanotubes;
[0043] Specifically, put 2.0 g of CNTs in a 100 mL round bottom flask, and then add 30 mL of concentrated sulfuric acid and 10 mL of concentrated nitric acid and mix them evenly. At 50 ℃, the reaction was refluxed for 3 hours under constant temperature magnetic stirring, cooled to room temperature naturally, and deionized. Dilute with water, filter under reduced pressure, wash with 5% hydrochloric acid solution, and then wash wit...
Embodiment 2
[0057] See figure 1 , A preparation method of phosphoric acid functionalized carbon nanotube-supported platinum catalyst for direct methanol fuel cell, comprising the following steps:
[0058] 1) At room temperature, put 2.0 g CNTs in a 100 mL round bottom flask, and then add 40 mL concentrated sulfuric acid and 15 mL concentrated nitric acid to mix uniformly. At 60 ℃, stir and reflux with magnetic force at a constant temperature for 180 minutes, and cool to room temperature. Dilute with deionized water, filter under reduced pressure, wash with 5% hydrochloric acid solution, and then wash with deionized water to neutral, until no SO is detected 4 2- Ions; vacuum drying at 60 ℃, the obtained carbon oxide nanotubes are denoted as Ox-CNTs-2;
[0059] 2) Add 1.0 g of oxidized carbon nanotubes to a 100 mL round bottom flask, add 40 mL of oxalyl chloride, reflux and stir for 12 hours at 60 ℃, and then distill and recover the excess oxalyl chloride at 100 ℃ to obtain Carbon acyl chloride ...
Embodiment 3
[0064] See figure 1 , A preparation method of phosphoric acid functionalized carbon nanotube-supported platinum catalyst for direct methanol fuel cell, comprising the following steps:
[0065] 1) At room temperature, put 2.0 g CNTs in a 100 mL round-bottom flask, then add 30 mL concentrated sulfuric acid and 10 mL concentrated nitric acid and mix them evenly. At 60 ℃, stir and reflux with magnetic force at a constant temperature for 180 minutes, and cool to room temperature. Dilute with deionized water, filter under reduced pressure, wash with 5% hydrochloric acid solution, and then wash with deionized water to neutral, until no SO is detected 4 2- Ions so far. Dry under vacuum at 60 ℃ to obtain oxidized carbon nanotubes, denoted as Ox-CNTs-3;
[0066] 2) Take 500 mg of oxidized carbon nanotubes into a 100 mL round bottom flask, add 35 mL of oxalyl chloride, reflux and stir for 24 hours at 60 ℃, and then distill and recover the excess oxalyl chloride at 100 ℃ to obtain Carbon acyl...
PUM
| Property | Measurement | Unit |
|---|---|---|
| current density | aaaaa | aaaaa |
| current density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More