Park, Yeji Jang, Ho Yeon Lee, Tae Kyung Kim, Taekyung Kim, Doyeop Kim, Dongjin Baik, Hionsuck Choi, Jinwon Kwon, Taehyun Yoo, Sung Jong Back, Seoin Lee, Kwangyeol 2025-03-21T08:00:28Z 2025-03-21T08:00:28Z 2025-03-19 2025-01 https://pubs.kist.re.kr/handle/201004/151955 The success of proton exchange membrane water electrolysis (PEMWE) depends on active and robust electrocatalysts to facilitate oxygen evolution reaction (OER). Heteroatom-doped-RuOx has emerged as a promising electrocatalysts because heteroatoms suppress lattice oxygen participation in the OER, thereby preventing the destabilization of surface Ru and catalyst degradation. However, identifying suitable heteroatoms and achieving their atomic-scale coupling with Ru atoms are nontrivial tasks. Herein, to steer the reaction pathway away from the involvement of lattice oxygen, we integrate OER-active Ir atoms into the RuO2 matrix, which maximizes the synergy between stable Ru and active Ir centers, by leveraging the changeable growth behavior of Ru/Ir atoms on lattice parameter-modulated templates. In PEMWE, the resulting (RuIr)O2/C electrocatalysts demonstrate notable current density of 4.96 A cm−2 and mass activity of 19.84 A mgRu+Ir−1 at 2.0 V. In situ spectroscopic analysis and computational calculations highlight the importance of the synergistic coexistence of Ru/Ir-dual-OER-active sites for mitigating Ru dissolution via the optimization of the binding energy with oxygen intermediates and stabilization of Ru sites. English Nature Publishing Group Atomic-level Ru-Ir mixing in rutile-type (RuIr)O2 for efficient and durable oxygen evolution catalysis Article 10.1038/s41467-025-55910-1 1 Nature Communications, v.16, no.1 Nature Communications 16 1 N scie scopus 001396064400024 2-s2.0-85215351396 Multidisciplinary Sciences Science & Technology - Other Topics Article ENHANCED PERFORMANCE IRIDIUM ELECTROCATALYSTS NANOPARTICLES DURABILITY RUO2(110) XANES SITES