Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7706247 | International Journal of Hydrogen Energy | 2018 | 8 Pages |
Abstract
The Vulcan XC-72R modified WS2 nanocomposite (WS2/Cï¼was prepared by solid reaction process combined with sonication. The as-prepared WS2/C nanocomposite presents a laminated porous structure by SEM and TEM characterization. The electrochemical experiments show that the onset potential and the limiting-current density of WS2/C is 0.78Â V and 4.99Â mAÂ cmâ2, respectively, which is much higher than, WS2 (3.12Â mAÂ cmâ2) and Vulcan XC-72R (2.79Â mAÂ cmâ2). The number of transfer electrons in ORR at the WS2/C nanocomposite electrode is 3.70, which is close to four-electron process. Besides, the current density of WS2/C nanocomposites remained at 90% after 20,000Â s, indicating its superior electrochemical stability. All these facts reveal that the as-prepared WS2/C nanocomposite can be regarded as a promising cathode ORR catalyst for fuel cell.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huodi Huang, Xiaofeng Zhang, Yi Zhang, Baohua Huang, Jiannan Cai, Shen Lin,