Yachao Zeng, Jiashun Liang, Chenzhao Li, Zhi Qiao, Boyang Li, Sooyeon Hwang, Nancy N Kariuki, Chun-Wai Chang, Maoyu Wang, Mason Lyons, Sungsik Lee, Zhenxing Feng, Guofeng Wang, Jian Xie, David A Cullen, Deborah J Myers, Gang Wu
Developing low platinum-group-metal (PGM) catalysts for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs) for heavy-duty vehicles (HDVs) remains a great challenge due to the highly demanded power density and long-term durability. This work explores the possible synergistic effect between single Mn site-rich carbon (MnSA -NC) and Pt nanoparticles, aiming to improve intrinsic activity and stability of PGM catalysts. Density functional theory (DFT) calculations predicted a strong coupling effect between Pt and MnN4 sites in the carbon support, strengthening their interactions to immobilize Pt nanoparticles during the ORR...
August 4, 2023: Journal of the American Chemical Society