题目： | 1D Monoclinic IrxRu1-xO2 Solid Solution with Ru-Enhanced Electrocatalytic Activity for Acidic Oxygen Evolution Reaction |
作者： | Keyang Qin1, Hao Yu1, Wenxiang Zhu1, Yunjie Zhou1, Zhiyong Guo2, Qi Shao3, Yangbo Wu4, Xuepeng Wang4, Youyong Li1, Yujin Ji1*, Fan Liao1*, Yang Liu1*, Zhenhui Kang1,5* and Mingwang Shao1* |
单位： | 1Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China 2State Key Laboratory for Managing Bioticand Chemical Threats to the Quality and Safety of Agro-Products, School of Material Science and Chemical Engineering Ningbo University, Ningbo 315211, PR China 3College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China 4Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, PR China 5Macao Institute of Materials Science and Engineering (MIMSE), MUST−SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, China |
摘要： | 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. |
影响因子： | 19.924 |
分区情况： | 一区 |
链接： | https://onlinelibrary.wiley.com/doi/10.1002/adfm.202402226 |
责任编辑：郭佳