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journal article·2025-11Open access

Optimizing Hybrid‐phase IrO 2 Catalysts with Ti for Enhanced Oxygen Evolution Reaction for Proton Exchange Membrane Water Electrolysis (Small 44/2025)

Young Hwa Yun, Jungwoo Choi, Youngtae Park, Hyeongjung Park, Gisu Doo, MinJoong Kim, Sang Soo Han, Jong Hyeok Park, Sechan Lee, Changsoo Lee, Hyun‐Seok Cho

Small· Volume 21· Issue 44
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Source abstract

Abstract

Proton Exchange Membrane Water Electrolysis In article number 2503601, Jong Hyeok Park, Sechan Lee, Changsoo Lee, Hyun-Seok Cho, and co-workers report a titanium-modified, hybrid-phase IrO2 anode for PEM water electrolysis that integrates composite and solid-solution domains to tune Ir–O bond distances and dynamics. In situ X-ray analysis reveals bias-induced Ir–O elongation that promotes formation of OOH intermediates, mitigating Ir dissolution and improving OER activity. This work provides a practical blueprint for manufacturable, high-durability PEMWE anodes.
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Research context

Energy storageCompositesCatalysis & surfaces

OpenAlex topics: Hybrid Renewable Energy Systems · Electrocatalysts for Energy Conversion · Membrane-based Ion Separation Techniques

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Affiliations

Hydrogen Research Department Korea Institute of Energy Research (KIER) 152 Gajeong‐ro, Yuseong‐gu Daejeon 34129 Republic of Korea

Department of Chemical and Biomolecular Engineering Yonsei University Seoul 03722 Republic of Korea

Computational Science Research Center Korea Institute of Science and Technology 14‐gil 5, Hwarang‐ro, Seongbuk‐gu Seoul 02792 Republic of Korea

National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA

Department of Materials Science and Engineering Kyung Hee University 1732 Deogyeong‐daero, Giheung‐gu Yongin Gyeonggi‐do 17104 Republic of Korea

Department of Chemistry Kookmin University 77 Jeongneung‐ro, Seongbuk‐gu Seoul 02707 Republic of Korea

Department of Applied Chemistry Kookmin University 77 Jeongneung‐ro, Seongbuk‐gu Seoul 02707 Republic of Korea

Department of Chemical Engineering Sogang University Seoul 04107 Republic of Korea

Institute of Emergent Materials Sogang University 35 Baekbeom‐ro, Mapo‐gu Seoul 04107 Republic of Korea

Institute of Energy and Environmental Technology Sogang University 35 Baekbeom‐ro, Mapo‐gu Seoul 04107 Republic of Korea

References

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