Wang Quan, Mi Baosen, Zhou Jun, Qin Ziwei, Chen Zhuo, Wang Hongbin
School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
H2E Technology Zhejiang Co. Ltd., Jinhua 321000, China.
Molecules. 2022 Apr 14;27(8):2524. doi: 10.3390/molecules27082524.
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 SiO template method, the electrocatalyst exhibits much higher specific activity (1.88 mA/cm) 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.
需要一种在启停操作期间具有高氧还原反应（ORR）活性和高稳定性的电催化剂。本文研究了中空结构的Pt-Ni电催化剂作为ORR催化剂。通过牺牲性SiO模板法合成后，该电催化剂表现出比商业Pt/C催化剂更高的比活性（1.88 mA/cm）。质量活性（0.49 A/mg）比商业Pt/C催化剂高7倍。使用Tafel和K-L图评估ORR的动力学。在加速耐久性测试（ADT）期间，它还表现出比商业Pt/C催化剂更高的耐久性。此外，该电催化剂对启停加速耐久性测试显示出良好的抗性，比活性和质量活性分别下降34.6%和40.8%，远优于商业催化剂。
