Xu ZYeh C.-LJiang YYun XLi C.-THo K.-CLin J.TLin R.Y.-Y.KUO-CHUAN HO2022-03-222022-03-22202119448244https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108634259&doi=10.1021%2facsami.1c05944&partnerID=40&md5=13d03d90b5683ad10fd62e8893983e58https://scholars.lib.ntu.edu.tw/handle/123456789/598238A 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.1D nanorodsmetal-organic frameworkorientationoxygen evolution reactionsolvent compositionsCarboxylationCharge transferElectrocatalystsMetal-Organic FrameworksNanorodsOrganometallicsOxygenPotassium hydroxideActive siteHigh current densitiesInterfacial charge transferNickel foamOverpotentialOxygen evolution reaction (oer)Solvent compositionOxygen evolution reactionjournal article10.1021/acsami.1c05944341107792-s2.0-85108634259