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Facile Synthesis Toward Surface Decorated Ir 1 O x @Pd 35 with Low Iridium Content for Highly Efficient and Durable Proton Exchange Membrane Water Electrolyzer
Author(s) -
Choi Hosung,
Ji Choi Hee,
Choi Hyuckjae,
Na Geumbi,
Lee Jongmin,
Kim ShinYeong,
Kim Junha,
Shin Yoojin,
Cho YongHun,
Sung YungEun
Publication year - 2025
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202400682
Subject(s) - iridium , proton exchange membrane fuel cell , materials science , proton , electrolysis , electrolysis of water , membrane , electrocatalyst , chemical engineering , electrochemistry , nanotechnology , catalysis , chemistry , fuel cells , engineering , physics , organic chemistry , electrode , biochemistry , quantum mechanics , electrolyte
Abstract Herein, we introduce an iridium‐decorated palladium nanocluster (Ir 1 O x @Pd 35 ) synthesized via an epoxide‐assisted sol‐gel method. The nanocluster had a unique surface‐decorated structure, as confirmed by transmission electron microscopy (TEM) and synchrotron‐based X‐ray photoelectron spectroscopy (XPS). Structural characterization indicated that the Ir shell inhibited Pd growth by forming a porous surface‐decorated structure, contributing to enhanced activity. With low Ir loading (0.10 mg Ir cm −2 ), Ir 1 O x @Pd 35 exhibits superior oxygen evolution reaction activity and durability compared to commercial IrO 2 . Ir 1 O x @Pd 35 also exhibited high performance and durability in a proton exchange membrane water electrolyzer (PEMWE), including a 20‐fold increase in Ir utilization compared to IrO 2 ‐based systems. Featuring tailored structures and enhanced Ir utilization, Ir 1 O x @Pd 35 offers a sustainable path for PEMWEs.