Application of 28903-71-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Reshaping cathodic catalyst layer for anion exchange membrane fuel cell from heterogeneous catalysis to homogeneous catalysis. Author is Ren, Rong; Wang, Xiaojiang; Chen, Hengquan; Miller, Hamish Andrew; Salam, Ihtasham; Varcoe, John Robert; Wu, Liang; Chen, Youhu; Liao, Hong-Gang; Liu, Ershuai; Bartoli, Francesco; Vizza, Francesco; Jia, Qingying; He, Qinggang.
In anion exchange membrane fuel cells, catalytic reactions occur at a well-defined three-phase interface, wherein conventional heterogeneous catalyst layer structures exacerbate problems, such as low catalyst utilization and limited mass transfer. We developed a structural engineering strategy to immobilize a mol. catalyst tetrakis(4-methoxyphenyl)porphyrin cobalt(II) (TMPPCo) on the side chains of an ionomer (polyfluorene, PF) to obtain a composite material (PF-TMPPCo), thereby achieving a homogeneous catalysis environment inside ion-flow channels, with greatly improved mass transfer and turnover frequency as a result of 100% utilization of the catalyst mols. The unique structure of the homogeneous catalysis system comprising interconnected nanoreactors exhibits advantages of low overpotential and high fuel-cell power d. This strategy of reshaping of the catalyst layer structure may serve as a new platform for applications of many mol. catalysts in fuel cells.
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