Iron-doped novel Co-based metal–organic frameworks for preparation of bifunctional catalysts with an amorphous structure for OER/HER in alkaline solution

• DOI: 10.1039/d2dt01837c
• Publication Date: 2022-09-14T13:02:44Z
• Authors: Siyu Dai; Yuqi Liu; Yunjie Mei; Jue Hu; Kaiming Wang; Yanghua Li; Nanhao Jin; Xinying Wang; Huilong Luo; Wei Li
• Keywords: Overpotential; Oxygen evolution

A novel two-dimensional Co-MOF material {[Co(dptz)2(oba)2]·(DMF)2}n is prepared using mixed organic ligands, which exhibits both OER (oxygen evolution reaction) and HER (hydrogen catalytic performance. The integration of an Fe dopant amorphous interface into to improving the electrocatalytic performance pristine MOFs (metal-organic frameworks) demonstrated origin remarkable catalyst elucidated. comprehensive characterization data Fe@Co-MOFs illustrate that there a crystallinity transition during doping Co-MOF, increases electron transfer rate ensures increased exposure ligand unsaturated active site on surface, modulates electronic structure Co center in synergistic manner. As result, optimized Fe@Co-MOF-3 with outstanding for OER, only 248 mV at current density 50 mA cm-2 excellent stability after 11 h testing alkaline solution. Not that, was achieved low overpotential 150 10 cm-2. present work indicates as-synthesized offer prospects developing electrocatalysts water splitting.