Balamurugan, Chandran Lee, Changhoon Cho, Kyusang Kim, Jehan Park, Byoungwook Kim, Woochul Lim, Namsoo Kim, Hyeonhun Pak, Yusin Chae, Keun Hwa Shim, Ji Hoon Kwon, Soomcheol 2024-01-19T09:01:32Z 2024-01-19T09:01:32Z 2023-09-21 2023-08 0926-3373 https://pubs.kist.re.kr/handle/201004/113388 The integration of bifunctionally active sites of multielement random alloy catalysts with other metal oxide electrocatalysts is a promising strategy for efficient electrochemical reactions. In this study, a novel combination of virtual crystal approximation and hydrothermal synthesis was used to investigate the composition-dependent structure and electrical property in a Ag1-xNix catalyst. The combination showed that a hexagonal closed-packed structure of Ag1-xNix with a compositional ratio of 6:4 (Ag:Ni) had electrical conductivity of similar to 2 x 10(7) S center dot cm(- 1) and an ionization potential of - 5.4 eV. Furthermore, the bifunctional oxygen electrocatalytic efficiencies of Ag0.6Ni0.4 were improved by forming a heterointerface with the CoNb2O6 electrocatalyst, resulting in a discharge-charge voltage gap of 0.81 V over 587 h, peak power density of 178.9 mW center dot cm(-2), and specific capacity of 806.8 mA center dot h center dot g(-1) in a zinc-air battery. This approach was applied to pouch-type zinc-air batteries, resulting in long-term stability of over 158.6 h at 10 mA center dot cm(- 2). English Elsevier BV High-performance rechargeable metal-air batteries enabled by efficient charge transport in multielement random alloy electrocatalyst Article 10.1016/j.apcatb.2023.122631 1 Applied Catalysis B: Environmental, v.330 Applied Catalysis B: Environmental 330 Y scie scopus 001057910400001 2-s2.0-85150362780 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article OXYGEN EVOLUTION BIFUNCTIONAL ELECTROCATALYST WATER NI OXIDE NANOPARTICLES TRANSITION ELECTRODES NANOTUBES CATALYSTS Virtual crystal approximation Multielement random alloy catalyst Electrocatalyst Oxygen electrolysis Energy storage Rechargeable metal-air pouch cell