Introducing Covalent Metal-Phosphorus Bonds into Intermetallic Platinum-Based Catalysts for High-Performance Fuel Cells
Yiping Li, Jiashun Liang, Zijie Lin, Xuan Liu, Shenzhou Li, Xiaoyu Yan, Zhao Cai, Jiantao Han, Yupei Zhao, Tanyuan Wang, Qing Li
Abstract
Open AccessRenewablesRESEARCH ARTICLES8 Jul 2024Introducing Covalent Metal-Phosphorus Bonds into Intermetallic Platinum-based Catalysts for High Performance Fuel Cells Yiping Li, Jiashun Liang, Zijie Lin, Xuan Liu, Shenzhou Li, Xiaoyu Yan, Zhao Cai, Jiantao Han, Yupei Zhao, Tanyuan Wang and Qing Li Yiping Li , Jiashun Liang , Zijie Lin , Xuan Liu , Shenzhou Li , Xiaoyu Yan , Zhao Cai , Jiantao Han , Yupei Zhao , Tanyuan Wang and Qing Li https://doi.org/10.31635/renewables.024.202400060 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail The inadequate performance of oxygen reduction reaction (ORR) catalysts hampers the development of proton exchange membrane fuel cells (PEMFCs). Herein, we propose an approach to tackle this problem by modulating the chemical bond type of intermetallic Pt-based catalysts, using phosphorus doped phosphorus doped L10-PtFeGa0.1/C (P-L10-PtFeGa0.1/C to be a a proof of concept. X-ray absorption spectroscopy demonstrates that the doped P transfers electrons to Pt and thus modifies the electronic structure of Pt, weakening the adsorption strength with oxygen-containing species. Therefore P-L10-PtFeGa0.1/C shows the 13 times mass activity (MA) compared to commercial Pt/C, with a decay of only 28% after 100,000 potential cycles. When equipped in the membrane electrode assembly, P-L10-PtFeGa0.1/C catalyst also exhibits remarkable activity (MA = 0.84 A mgPt−1 at 0.9 V) and stability (MA retention = 72% and voltage loss = 9 mV at 0.8 A cm−2 after 30,000 cycles), making it one of the best performances among recorded Pt-based catalysts. Theoretical studies demonstrate that the doping of P optimizes the adsorption energy between Pt and oxygen intermediates through sp-d orbital interactions, and prevents metal dissolution via forming stronger Pt-P covalent bonds compared with Pt-Pt bonds. Download figure Download PowerPoint Next article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2024 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...