ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 56459 - 56468
Published: Oct. 8, 2024
Covalent–organic frameworks (COFs) are promising electrocatalysts for the selective synthesis of H2O2 through two-electron oxygen reduction reaction (2e– ORR). However, design and efficient stable COF-based is still challenging. In this work, a predesigned 1,10-phenanthroline-based one-dimensional COF (PYTA-PTDE-COF) was constructed to anchor main group metal (In, Sn, Sb) as toward 2e– ORR. The catalysts featured with fully exposed metalated side chains. Structural characterization revealed that PYTA-PTDE-M's (M = In, all quite similar, except coordinated ions maintenance good crystallinity. They exhibited satisfying activity selectivity ORR under alkaline conditions. Among them, PYTA-PTDE-Sb best performance (Eonset 0.765 V, 96%, yield rate 209.2 mmol gcat–1 h–1). Moreover, it also delivered superior stability almost no attenuation current density during long-time test. Theoretical calculations Sb site in COFs has lowest adsorption strength *OOH, which could be reason its selectivity. assembled zinc–air battery realizes not only supply clean energy but production green chemicals, showing highly practical applications. This work offers an example designing metal-coordinated 1D reveals fundamental structure–activity relationship
Language: Английский