DataVXAdvanced Energy MaterialsPaper
journal article·2024-09Open access

Ultrahigh Electrode Performance of Low‐Loaded Iridium Jagged Nanotubes for Water Electrolysis Applications

Jun Kim, Taehyun Kwon, Jaeseung Lee, Hyun Ju Lee, Minki Jun, Hyung Chul Ham, Hyunchul Ju, Sangwon Kim, Jin Young Kim

Advanced Energy Materials· Volume 14· Issue 34
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Source abstract

Abstract

Abstract Highly active Ir electrocatalysts based on ultralow loading for proton exchange membrane water electrolysis (PEMWE) applications are desirable to achieve gigawatt production levels. However, no clear direction has been developed yet to achieve that scale. Here, newly‐synthesized Ir‐based jagged nanotubes (J‐IrNTs) with the ultrahigh electrode performance of 10 A mgIr−1 at 1.6 V in a PEMWE cell at Ir loadings as low as 0.05 mgIr cm−2 are reported, outperforming previously reported Ir‐based electrocatalysts. The Ir‐JrNT also exhibits only marginal degradation in stability tests. Notably, the resulting electrode of Ir‐JrNT provides enhanced intrinsic catalytic activity and high surface area for efficient electrocatalysis, with hierarchical branching composed of interconnected multiscale channels and highly corrugated surface textures, for facile mass transport. The findings demonstrate that the jagged nanotubular structure is a promising approach for overcoming the limitations associated with Ir‐based electrocatalysts and developing sustainable advanced PEMWE.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Hydrogen Storage and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hydrogen∙Fuel Cell Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

Department of Chemistry and Research Institute of Basic Sciences Incheon National University (INU) Incheon 22012 Republic of Korea

Department of Mechanical Engineering & BK21 FOUR Education and Research tema for Overcoming Mechanical Challenges in Carbon Neutrality Inha University Incheon 22212 Republic of Korea

Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy and Materials Inha University Incheon 22212 Republic of Korea

Korea Institute of Science and Technology (KIST) Europe Saarbrücken Germany

Transfercenter Sustainable Electrochemistry Saarland University Saarbrücken Germany

Funding

Korea Institute of Energy Technology Evaluation and Planning

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