Ruthenium-iridium alloyed oxides with remarkable catalytic stability for proton exchange membrane water electrolysis at industrial current density

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-10-05 DOI:10.1007/s12598-024-03004-0

Ting Huang, Ze-Nan Bian, Cong Wei, Tao Huang, Yi-Fan Wang, Zhao-Hui Liu, Xin-Yue Du, You-Ming Lv, Yan-Yan Fang, Ming Fang, Gong-Ming Wang

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Abstract

Despite the cost and activity advantages, ruthenium-based oxygen evolution reaction (OER) catalysts face severe stability problems for proton exchange membrane water electrolysis (PEM-WE) due to Ru dissolution. Although tremendous attention has been paid to enhancing the stability and activity under small current density in three electrode systems, there still lacks validation under industrial current density at the device level. Aiming at this issue, we report highly active and durable ruthenium-iridium alloyed oxides (IrRuO_x) as the acidic OER catalyst for PEM-WE with exceptional durability for 1600 h at an industrial current density of 2.0 A·cm⁻². X-ray absorption spectroscopy reveals that the introduction of iridium modulates the electronic structure of Ru and strengthens the local Ru–O bonds in RuO₂, which is crucial for ensuring activity and stability. As a result, in comparison with its RuO₂ counterpart, IrRuO_x works stably against the Ru leaching-induced catalytic layer breakage during the stability test. This work demonstrates the great potential of IrRuO_x as the practical OER catalyst for the application in PEM-WE.

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.