Structurally engineered CNT-confined Mn <sub> <i>x</i> </sub> Ru <sub> 1− <i>x</i> </sub> O <sub>2</sub> catalysts for efficient acidic oxygen evolution at low Ru loading
Xiaolin Zheng, Xiaofei Miao, Zijie Yang, Zhaoyan Luo, Jian Zhen Yu, Haizhou Li, Lei Zhang
Abstract
Raman spectroscopy, and differential electrochemical mass spectrometry reveal that the electron-rich Ru centers stabilized by Mn-O bridges accelerate charge transfer and suppress Ru dissolution during the OER. Moreover, the CNT substrate and Ru incorporation synergistically generate abundant oxygen vacancies, significantly enhancing the catalytic activity through an improved lattice oxygen-mediated mechanism. This work highlights the critical role of CNT confinement and interfacial electronic modulation in decoupling noble metal usage from performance, offering a versatile design strategy for next-generation acidic OER catalysts.
Topics & Concepts
CatalysisOverpotentialOxygen evolutionChemical engineeringMaterials scienceDissolutionElectrochemistryNoble metalTransition metalNanotechnologyCarbon nanotubeRaman spectroscopyChemistryElectrocatalystWater splittingOxygenSubstrate (aquarium)Inorganic chemistryCoatingRhodiumRutheniumMetalNanostructureMass transferNanoparticleActive siteMembraneCatalytic Processes in Materials ScienceElectrocatalysts for Energy ConversionFuel Cells and Related Materials