Orientation-Adjustable Metal-Organic Framework Nanorods for Efficient Oxygen Evolution Reaction
Journal
ACS Applied Materials and Interfaces
Journal Volume
13
Journal Issue
24
Pages
28242-28251
Date Issued
2021
Author(s)
Abstract
A series of orientation-adjustable metal-organic framework (MOF) nanorods, CoFe(dobpdc)-I to CoFe(dobpdc)-III (dobpdc = 4,4′-dihydroxybiphenyl-3,3′-dicarboxylate), is developed on a 3D nickel foam (NF) template. By modulating the solvent composition for synthesis, the feature of MOF nanorods on the template can be varied from disorganized to a unidirectional orientation perpendicular to the NF. Well-aligned, vertically oriented CoFe(dobpdc)-III nanorods are hydrophilic and have more exposed active sites and interfacial charge transfer ability. Consequently, they exhibit a superior activity for oxygen evolution reaction (OER) with ultralow overpotentials of 176 and 240 mV at 10 and 300 mA cm-2 in 1.0 M KOH (aq), respectively. CoFe(dobpdc)-III also shows a record low overpotential of 204 mV at J10 mA cm-2 among the electrocatalysts based on CoFe MOF and an excellent overpotential at a high current density (100 mA cm-2) of 312 mV in 0.1 M KOH (aq). This is the first report of a convenient method to straighten up MOF nanorods on a template for highly efficient OER. ? 2021 American Chemical Society.
Subjects
1D nanorods
metal-organic framework
orientation
oxygen evolution reaction
solvent compositions
Carboxylation
Charge transfer
Electrocatalysts
Metal-Organic Frameworks
Nanorods
Organometallics
Oxygen
Potassium hydroxide
Active site
High current densities
Interfacial charge transfer
Nickel foam
Overpotential
Oxygen evolution reaction (oer)
Solvent composition
Oxygen evolution reaction
SDGs
Type
journal article