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Indexed by:期刊论文

Date of Publication:2014-07-01

Journal:JOURNAL OF ENERGY CHEMISTRY

Included Journals:SCIE、EI、ISTIC

Volume:23

Issue:4

Page Number:507-512

ISSN No.:2095-4956

Key Words:Co(II)-salen complex; metal-organic frameworks; MIL-100(Cr); encapsulation; electrocatalysis; oxygen reduction reaction

Abstract:Co(II)-salen was encapsulated in MIL-100(Cr) metal organic framework by "ship in a bottle" to synthesize a new electrocatalyst, Cosalen@MIL-100(Cr). The material was characterized by XRD, FT-IR, UV-Vis and N-2-adsorption. The Cosalen@MIL-100(Cr) modified glassy carbon electrode exhibits a well-defined reduction peak at the potential of -d0.21 V toward the oxygen reduction reaction (ORR) by cyclic voltammetry (CV) in pH = 6.84 phosphate buffer. Almost 400 mV positive shift of potential at Cosalen@MIL-100(Cr) modified electrode for ORR compared with that at bare glassy carbon, indicates that Cosalen@MIL-100(Cr) possesses excellent electrocatalytic activity. The transferred number of electrons for ORR was determined by chronocoulometry. The result suggests that the introduction of Con-salen complex into MOF increases the electrocatalytic activity via a four-electron reduction pathway. Furthermore, this electrocatalyst exhibits good stability and reproducibility.