1. School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, China; 2. Anhui Provincial Engineering Laboratory of Silicon-Based Advanced Materials, Bengbu 233030, China; 3. College of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
Abstract: A series of iron-based metal organic frameworks (MOFs) are synthesized by using ferric trichloride as iron source and different dicarboxylic acids as ligands.The samples' structure and morphology are systematically investigated by means of XRD,SEM and FT-IR.Electrochemical tests indicate that Fe-based MOFs constructed with different dicarboxylic acid ligands have different oxygen evolution performances.Compared with other ligands,the MOFs constructed with fumaric acid as ligand exhibit excellent oxygen evolution activity,which can achieve a current density of 10 mA·cm-2 and 100 mA·cm-2 with only 255 mV and 302 mV of potentials,respectively in 1 mol·L-1 KOH electrolyte.The corresponding Tafel slope is 28.3 mV·dec-1.In addition,this MOFs catalyst exhibits excellent catalytic stability.
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