Cu-Metal Organic Framework derived multilevel hierarchy as a bifunctional electrode for high-performance supercapacitors and oxygen evolution reaction Zahir Abbas 1 , Nissar Hussain 1 , Imtiaz Ahmed 2 , Shaikh M. Mobin 1 1 Department of Chemistry, Indian Institute of Technology Indore, India, 2 Department of Chemistry, Central University of Punjab, India The development of a MOFs-derived multilevel nanostructured in a single step still remains a challenging task. Herein, we have synthesized novel Cu-MOF via a slow diffusion method at ambient temperature and further utilized it as a precursor source for MOF-derived Cu/Cu x O@NC ( x = 1 and 2). The studies suggest that the organic ligands served as a source of an N-doped carbon matrix encapsulated with metal oxide nanoparticles which were confirmed by various characterization techniques, further BET analysis reveals a surface area of 178.46 m 2 /g. The synthesized multilevel hierarchy was utilized as an electro-active material in a supercapacitor that achieved a specific capacitance of 546.6 Fg -1 at 1 Ag -1 with higher cyclic retention of 91.81% after 10,000 cycles. Furthermore, the ASC device was fabricated using Cu/Cu x O@NC as the positive electrode and carbon black as the negative electrode and utilized to enlighten the commercially available LED bulb. The fabricated ASC device was further employed for a two-electrode study which achieved a specific capacitance of 68 Fg -1 along with a comparable energy density of 13.6 Whkg -1 . Furthermore, the electrode material was also explored for oxygen evolution reaction (OER) in an alkaline medium with a low overpotential of 170 mV along with a Tafel slope of 95 mVdec -1 having long-term stability. The MOF-derived material has high durability, chemical stability, and efficient electrochemical performance. This work provides some new thoughts for the design and preparation of a multilevel hierarchy ( Cu/Cu x O@NC ) via a single precursor source in a single step and explored multifunctional applications in energy storage and energy conversion system.
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© The Author(s), 2023
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