DataVXAdvanced Functional MaterialsPaper
journal article·2025-05

1D Monoclinic IrxRu1‐xO2 Solid Solution with Ru‐Enhanced Electrocatalytic Activity for Acidic Oxygen Evolution Reaction

Keyang Qin, Hao Yu, Wenxiang Zhu, Yunjie Zhou, Zhiyong Guo, Qi Shao, Yangbo Wu, Xuepeng Wang, Youyong Li, Yujin Ji, Fan Liao, Yang Liu, Zhenhui Kang, Mingwang Shao

Advanced Functional Materials· Volume 35· Issue 21
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Source abstract

Abstract

Abstract The rutile phase IrO2, as a promising catalyst for oxygen evolution reaction (OER), still falls short of satisfactory activity. Here, a novel 1D monoclinic phase iridium‐ruthenium oxide solid solution (m‐IrxRu1‐xO2) is reported. For m‐IrxRu1‐xO2 with different metal proportions, the optimal m‐Ir0.91Ru0.09O2‐δ catalyst exhibits excellent OER activity under acidic conditions with an overpotential of 180 mV at 10 mA cm−2. As an anode catalyst in a proton exchange membrane electrolyzer, m‐Ir0.91Ru0.09O2‐δ with a low catalyst loading (0.1 mg cm−2) can operate ≈256 h at 1.8 V with a high current density over 900 mA cm−2 at room temperature. Such a satisfied stability may have originated from the specific morphology and crystal structure, which is confirmed by the transient potential scanning test. Density functional theory calculations show that the Ru in the m‐IrxRu1‐xO2 facilitates decreasing the OER overpotentials due to the electron transfer from Ru to Ir.
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Research context

Energy storageCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

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

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 P. R. China

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐Products School of Material Science and Chemical Engineering Ningbo University Ningbo 315211 P. R. China

College of Chemistry Chemical Engineering and Materials Science Soochow University Jiangsu 215123 P. R. China

Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo 315211 P. R. China

Macao Institute of Materials Science and Engineering (MIMSE) MUST−SUDA Joint Research Center for Advanced Functional Materials Macau University of Science and Technology Taipa Macau 999078 P. R. China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province · China Postdoctoral Science Foundation · Higher Education Discipline Innovation Project

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