Lee, Changho Hwang, Chang Kyu An, Jung Won Jang, Ji Soo Koo, Bonjae Kim, Jong Min Shin, Kihyun Lee, Caroline Sunyong Yoon, Ki Ro 2025-01-02T02:30:20Z 2025-01-02T02:30:20Z 2024-12-30 2024-12 0926-3373 https://pubs.kist.re.kr/handle/201004/151445 Advancing zinc-air battery (ZAB) technology necessitates the development of air cathode electrocatalyst systems that demonstrate high reactivity and stability. We introduce a novel method to fabricate a robust catalyst-support hybrid. This hybrid comprises Co-doped Pt nanoparticles (NPs) anchored on metal oxide (Ex-PtCoWO) nanofibers (NFs), synthesized via electrospinning followed by selective metal ex-solution. Controlling the ex-solution of metal NPs leads to a highly active and stable oxygen reduction reaction (ORR). Moreover, the three-dimensional CoWO4-x NFs network enhances the surface exposure of ex-solved metal NPs, thereby aiding both selective ex-solution and the provision of active sites for the oxygen evolution reaction (OER) during ZAB recharge. The Ex-PtCoWO NF exhibits an ORR half-wave potential of 0.89 V and an OER potential of 1.69 V at 10 mA cm(-2) in alkaline media. ZABs utilizing Ex-PtCoWO NF show an extended cycle life of over 240 h with reduced charge-discharge polarization, compared to commercial catalysts. English Elsevier BV Performance enhancement of rechargeable zinc-air battery through synergistic ex-solution of multi-component Pt/CoWO4-x catalysts Article 10.1016/j.apcatb.2024.124371 1 Applied Catalysis B: Environment and Energy, v.358 Applied Catalysis B: Environment and Energy 358 Y scie scopus 001369160900001 2-s2.0-85197508322 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article GENERALIZED GRADIENT APPROXIMATION HYDROGEN EVOLUTION OXYGEN REDUCTION OXIDATION NITRIDE DESIGN Bifunctional electrocatalyst Electrospinning Multi-component ex-solution Catalyst-support hybrid Zinc-air battery