Effect of mesoporous carbon on oxygen reduction reaction activity as cathode catalyst support for proton exchange membrane fuel cell. (30th July 2022)

• Record Type: Journal Article
• Authors: Xie, Meng; Chu, Tiankuo; Wang, Xiaolei; Li, Bing; Yang, Daijun; Ming, Pingwen; Zhang, Cunman
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 65(2022)
• Page Start: 28074
• Page End: 28085
• Publication Date: 2022-07-30
• Subjects: PEMFC -- Catalyst -- Carbon support -- Mesoporous-structure -- Internal Pt particles -- Oxygen reduction reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.06.131
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this paper, a new carbon support with a large number of mesoporous-structures is selected to prepare Pt/C catalysts. Transmission electron microscope (TEM) results show that the Pt/3# catalyst presents a sponge-like morphology, Pt particles are not only evenly distributed on the surface of carbon support, but also the smaller Pt particles are deposited in the mesoporous inside the support. The average diameter of Pt particles is only 2.8 nm. The membrane electrode assembly (MEA) based on Pt/3# catalyst also shows excellent performance. In conclusion, the 3# support is an idea carbon support for PEMFC, which helps to improve the oxygen reduction reaction (ORR) activity of the catalyst. Based on the "internal-Pt" structure of the support mesoporous, the efficient three-phase boundaries (TPBs) are construct to avoid the poisoning effect of ionomer on the nano-metal particles, reduce the activation impedance and oxygen mass transfer impedance, and improve the reaction efficiency. Highlights: The utilization efficiency of nano metal particles is significantly improved by the new support. MEA based on new support also shows excellent performance. Smaller Pt particles occupy part of the original mesoporous space of the support. The "internal Pt" structure catalyst as PEMFC cathode can build efficient three-phase boundary.