Shim, Jaehyuk Lee, Kangjae Yu, Yunjae Lee, Hyeon Seok Shin, Heejong Lee, Kug-Seung Bootharaju, Megalamane S. Han, Sanghwi Yi, Gyu Seong Ko, Hyojoo Lee, Sihwa Ryu, Jaeyune Kim, Minho Lee, Byoung-Hoon Hyeon, Taeghwan Sung, Yung-Eun 2025-05-22T05:30:26Z 2025-05-22T05:30:26Z 2025-05-21 2025-05 0002-7863 https://pubs.kist.re.kr/handle/201004/152453 Green hydrogen production via proton exchange membrane water electrolysis (PEMWE) faces economic feasibility challenges, primarily due to its reliance on noble metal catalysts. While cost-effective Ru-based catalysts show promise as alternatives to expensive Ir-based catalysts for an anodic oxygen evolution reaction, their long-term performance is compromised by overoxidation at high current densities. In addressing this challenge, we present a cooperative dual-site strategy for atomic-scale incorporation of high-valent d0-metal cations into RuO2. This synthesis results in uniformly distributed Ru-O-d0metal bonds, effectively reconciling the activity and stability trade-off. Leveraging these effects, our optimized Ta1/RuO2 catalyst demonstrates exceptional performance, with a low overpotential of 164 +/- 2 mV and stable operation for 1000 h at 100 mA cm-2. In practical PEMWE systems, Ta1/RuO2 achieves 1.58 V at 2 A cm-2, surpassing the 2026 Department of Energy target, and maintains remarkable stability over 650 h at 500 mA cm-2. This breakthrough offers a highly active and durable PEMWE system suitable for industrial-scale applications. English American Chemical Society AAtomically Dispersed High-Valent d0-Metal Breaks the Activity-Stability Trade-Off in Proton Exchange Membrane Water Electrolysis Article 10.1021/jacs.5c00936 1 Journal of the American Chemical Society, v.147, no.19, pp.16179 - 16188 Journal of the American Chemical Society 147 19 16179 16188 N scie scopus 001480031800001 2-s2.0-105004055992 Chemistry, Multidisciplinary Chemistry Article PERFORMANCE OXIDATION CATALYST SITES OXYGEN EVOLUTION REACTION ELECTROCATALYST