UiO-66-NO2 as an Oxygen “Pump” for Enhancing Oxygen Reduction Reaction Performance

• DOI: 10.1021/acs.chemmater.8b04934
• Publication Date: 2019-02-13T21:12:35Z
• Authors: Shanshan Zeng; Fucong Lyu; Ligang Sun; Yawen Zhan; Fei-Xiang Ma; Jian Lu; Yang Yang Li
• Keywords: 01 natural sciences; 0104 chemical sciences

In this work, UiO-66-based metal–organic frameworks are investigated as an oxygen reduction reaction (ORR) catalyst for the first time. UiO-66-NO2 is solvothermally grown on surface of cobalt phthalocyanine-anchored carbon nanotube (CoCNT) surface, serving "pump" to accelerate (ORR). The UiO-66-NO2-attached CoCNT (UiO-66-NO2@CoCNT) exhibits superior electrochemical catalytic properties, exceeding state-of-the-art commercial 20% Pt/C with more positive half-wave potential (15 mV difference, at 1600 rpm), better stability (no significant degradation UiO-66-NO2@CoCNT vs 19% after 25 000 s), and higher methanol tolerance. When assembled in a flexible zinc–air battery, remains competitive alternative comparable power density excellent flexibility, suggesting its wearable electronic devices. outstanding performance composite closely related synergetic effect among three components: CNT conductive backbone, phthalocyanines active site, ideal adsorption pump (the diffusion rate 4.8 times that 17.7 CoCNT). synergy between components facilitates adsorption, transfer adsorbed molecules, reduction, electron conduction.