Lattice Matching Growth of Conductive Hierarchical Porous MOF/LDH Heteronanotube Arrays for Highly Efficient Water Oxidation

• DOI: 10.1002/adma.202006351
• Publication Date: 2021-01-18T08:51:50Z
• Authors: Ying Wang; Liting Yan; Kamran Dastafkan; Chuan Zhao; Xuebo Zhao; Yingying Xue; Jiamin Huo; Shuni Li; Quanguo Zhai
• Keywords: Oxygen evolution

The conjugation of metal-organic frameworks (MOFs) into different multicomponent materials to precisely construct aligned heterostructures is fascinating but elusive owing the disparate interfacial energy and nucleation kinetics. Herein, a promising lattice-matching growth strategy demonstrated for conductive MOF/layered double hydroxide (cMOF/LDH) heteronanotube arrays with highly ordered hierarchical porous structures enabling an ultraefficient oxygen evolution reaction (OER). CoNiFe-LDH nanowires are used as interior template engineer interface by inlaying cMOF matching two crystal lattice systems, thus conducting graft cMOF/LDH along LDH nanowire. A class produced through continuously regulating transformation degree. synergistic effects components significantly promote chemical electronic their electroactive surface area. Optimized exhibit extraordinary OER activity ultralow overpotentials 216 227 mV deliver current densities 50 100 mA cm-2 small Tafel slope 34.1 dec-1 , ranking it among best MOF non-noble-metal-based catalysts OER. robust performance under high density vigorous gas bubble conditions enable such MOF/LDH practical water electrolysis.