高等学校化学学报2025，Vol.46Issue(12)：55-66,12.DOI:10.7503/cjcu20250265
多孔纳米带交织结构Ir1Ru3/TiOxNy薄膜电极的构筑及酸性析氧反应性能提升机制
Construction of Porous Nanoribbon-interwoven Ir1Ru3/TiOxNy Film Electrodes and the Mechanism Underlying Enhanced Performance in the Acidic Oxygen Evolution Reaction
摘要
Abstract
The binder-free porous nanoribbon-interwoven Ir1Ru3/TiOxNy thin-film electrode was fabricated through a combined process of reduced-pressure filtration,ion exchange,thermal nitridation and impregnation reduction.Systematic investigations were conducted to elucidate the effects of microstructure and varying precious metal loadings on the catalytic activity and stability for acidic oxygen evolution reaction(OER).The charge transfer dynamics at the interface and electronic transport mechanisms in the binder-free system were comprehensively analyzed,revealing the intrinsic enhancement mechanism for OER performance.Electrochemical characterization demonstrated that the Ir1Ru3/TiOxNy thin-film electrode with a noble metal loading of 10.5%(mass fraction)exhibited outstanding OER activity with overpotentials of 199,233 and 368 mV at current densities of 50,100 and 500 mA/cm2,respectively.Notably,the electrode showed exceptional stability with a minimal voltage decay rate of 0.265 mV/h during a 200 h durability test at 20 mA/cm2.These performance metrics significantly surpassed those of the binder-containing Ir1Ru3/TiOxNy thin-film electrode with identical precious metal loading(278 mV@50 mA/cm2,312 mV@100 mA/cm2,466 mV@500 mA/cm2 and a 100-hour decay rate of 1.7 mV/h).This study provides novel insights into the rational design of high-performance acidic oxygen evolution reaction electrodes for high current densities.关键词
酸性析氧反应/纳米带交织结构/多孔结构/大电流密度Key words
Acidic oxygen evolution reaction/Nanoribbon-interwoven structure/Porous structure/High current density分类
化学化工引用本文复制引用
王俊杰,王姝颖,杜星,赵雷,李薇馨,何漩,陈辉,王大珩,方伟..多孔纳米带交织结构Ir1Ru3/TiOxNy薄膜电极的构筑及酸性析氧反应性能提升机制[J].高等学校化学学报,2025,46(12):55-66,12.基金项目
国家自然科学基金(批准号:22105151,52305211)、湖北省重点研发计划项目(批准号:2022BAA094)和湖北省自然科学基金(批准号:2024AFB836,2023AFB626,2022CFB626)资助. Supported by the National Natural Science Foundation of China(Nos.22105151,52305211),the Key Research Program of Hubei Province,China(No.2022BAA094)and the Natural Science Foundation of Hubei Province,China(Nos.2024AFB836,2023AFB626,2022CFB626). （批准号:22105151,52305211）
