| Autor: |
LU Lu, WU Lei, SHI Ji-cheng, XU Hong-feng, CONG Tao-quan |
| Jazyk: |
čínština |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Cailiao gongcheng, Vol 47, Iss 6, Pp 63-69 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1001-4381 |
| DOI: |
10.11868/j.issn.1001-4381.2018.000379 |
| Popis: |
The important reason of the reduction of the catalytic performance of Pt/C catalyst is carbon carrier corrosion. The risk of oxgen flooding in proton-exchange membrane fuel cellsis also increased by hydrophilicity of this catalyst. The Pt/C catalyst was subsequently reduced using hydrazine hydrate to make Pt/C corrosion resistant and anti-flooding. Comparison by infrared spectra of absorption peaks shows the increased number of oxygen-containing functional groups in the XC-72 carbon surface treated with hydrogen peroxide. Its measured contact angle is less than that of untreated XC-72 carbon. Reduction of oxidized XC-72 carbon with hydrazine hydrate shows that the contact angle is increased by 22.4° compared with that of the oxidized XC-72 carbon, indicating anti-flooding enhancement. As shown in the specific surface area measurement, the specific surface area of XC-72 is reduced by the hydrogen peroxide treatment but its mespopore ratio is increased, which favors the carrier load Pt. The anti-flooding of Pt/C catalyst after reduction with hydrazine hydrate is stronger than that before reduction, indicating an increase in contact angle by 6.2°. After 2000 cycles of cyclic voltammetry, the electrochemical specific surface loss is decreased and the durability is improved for the reduced Pt/C catalyst by hydrazine hydrate. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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