Hollow-Structure Pt-Ni Nanoparticle Electrocatalysts for Oxygen Reduction Reaction

Molecules

Ziwei Qin¹  Jun Zhou¹  Hongbin Wang¹  Baosen Mi¹  Zhuo Chen¹  Quan Wang¹ 

[1] School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;

关键词: electrocatalyst;    oxygen reduction reaction;    PEMFC;    hollow structure;    carbon-free;   

DOI  :  10.3390/molecules27082524

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown