1474
Highly Active TAL2 and TAL4 Metal-Organic Framework Derived Bifunctional Oxygen Electrocatalyst

Wednesday, 1 June 2022: 10:40
West Meeting Room 212 (Vancouver Convention Center)
G. Yusibova, J. M. Assafrei, J. Aruväli (University of Tartu), M. Käärik (Institute of Chemistry, University of Tartu), P. Paiste (Institute of Ecology and Earth Sciences, University of Tartu), J. Leis (University of Tartu, Institute of Chemistry), P. Starkov (Tallinn University of Technology), and N. Kongi (University of Tartu)
The development of green energy conversion technologies and sophisticated energy storage devices are crucial for a sustainable future. Currently, metal-air batteries and fuel cells promise cost-effective, efficient and clean operation. However, highly active bifunctional noble-metal-free catalyst materials are needed to boost sluggish kinetics of oxygen electrode reactions for replacing conventional benchmark catalysts (Pt/C; RuO2/IrO2). Herein, we report highly active manganese and cobalt containing metal-organic framework (MOF)-derived bifunctional electrocatalyst with rich porous and well-dispersed structure. Mn/Co-containing material displayed excellent electrocatalytic performance toward both oxygen evolution and reduction reactions (Ej=10 =1.66 V; E1/2 = 0.85 V vs RHE, 0.1 M KOH) due to the desired active sites and architecture. Proposed bifunctional electrocatalyst was also tested in Zn-air battery setup and demonstrated outstanding durability within 10 h cycling without any noticeable degradation and great efficiency with high power density.