Hollow-Structure Pt-Ni Nanoparticle Electrocatalysts for Oxygen Reduction Reaction |
| |
| Authors: | Quan Wang Baosen Mi Jun Zhou Ziwei Qin Zhuo Chen Hongbin Wang |
| |
| Institution: | 1.School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; (Q.W.); (B.M.); (J.Z.); (Z.Q.); (Z.C.);2.H2E Technology Zhejiang Co. Ltd., Jinhua 321000, China;3.Shanghai Engineering Research Center for Metal Parts Green Remanufacture, Shanghai 200444, China |
| |
| Abstract: | An electrocatalyst with high oxygen reduction reaction (ORR) activity and high stability during start–stop operation is necessary. In this paper, hollow-structure Pt-Ni electrocatalysts are investigated as ORR catalysts. After synthesis via sacrificial SiO2 template method, the electrocatalyst exhibits much higher specific activity (1.88 mA/cm2) than a commercial Pt/C catalyst. The mass activity (0.49 A/mg) is 7 times higher than the commercial Pt/C catalyst. The kinetics of the ORR is evaluated using Tafel and K-L plots. It also exhibits a higher durability than commercial Pt/C catalyst during accelerated durability test (ADT). Moreover, the electrocatalyst shows good resistance against accelerated durability test for start–stop, the specific activity and mass activity drops 34.6% and 40.8%, respectively, far better than the commercial catalyst. |
| |
| Keywords: | electrocatalyst oxygen reduction reaction PEMFC hollow structure carbon-free |
|
|
