Ayyaluri, Ramakrishna Reddy Vamsi Krishna, B. N. Ankinapalli, Obula Reddy Lee, Young Jun Natarajan, Logeshwaran Yu, Jae Su 2024-07-26T04:30:18Z 2024-07-26T04:30:18Z 2024-07-25 2024-07 https://pubs.kist.re.kr/handle/201004/150290 Recently, the demand for stable, cost-effective, and highly active bifunctional catalysts has increased in the energy storage community. In this study, we present the preparation of manganese cobalt oxide/manganese oxide (MnCo2O4/Mn2O3) nanorod (NR) materials via a facile one-step hydrothermal method without calcination. The MnCo2O4/Mn2O3 NR revealed better electrocatalytic properties toward the oxygen reduction and oxygen evolution reactions. The MnCo2O4/Mn2O3 NR electrocatalyst exhibited high diffusion-limiting current density values and greater durability compared to the Pt/C and IrO2 catalysts, respectively. The electrode material showed excellent chronopotentiometric stability for 30 h at 10 mA cm(-2) and displayed remarkable stability at different current densities with low potential drops. Furthermore, the MnCo2O4/Mn2O3 NR-based zinc-air battery (ZAB) exhibited a slightly smaller voltage plateau as well as lower electrochemical impedance values than the Pt/C//IrO2-based ZAB. Significantly, the MnCo2O4/Mn2O3 NR-based ZAB (68 cycles @ similar to 20.3 h) demonstrated better durability than the Pt/C//IrO2-based ZAB (28 cycles @ similar to 8.3 h). The obtained excellent bifunctional catalytic properties and cycling stability results indicate that MnCo2O4/Mn2O3 NRs are cheap and promising bifunctional catalyst candidates for rechargeable metal-air batteries. English American Chemical Society MnCo2O4/Mn2O3 Nanorod Architectures as Bifunctional Electrocatalyst Material for Rechargeable Zinc-Air Batteries Article 10.1021/acssuschemeng.4c01477 1 ACS Sustainable Chemistry & Engineering, v.12, no.29, pp.10765 - 10775 ACS Sustainable Chemistry & Engineering 12 29 10765 10775 N scie scopus 001264039600001 2-s2.0-85197747345 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Engineering, Chemical Chemistry Science & Technology - Other Topics Engineering Article NANOPARTICLES CATALYSTS OXIDES NANOSTRUCTURES SPINELS OXYGEN EVOLUTION REACTION REDUCTION COBALT CARBON ELECTRODE manganese cobalt oxide/manganese oxide nanorods oxygenreduction reaction oxygen evolution reaction zinc-airbatteries