Interface-Confined Metal Oxide Nanolayers: From Metal Substrate to Oxide Substrate

作者：R K Li, Jinhu Dong, Qiang Fu, Xinhe Bao · 发表于：Accounts of Materials Research · 年份：2026 · DOI：10.1021/accountsmr.6c00009 · 被引用次数：2 · 研究领域：Catalytic Processes in Materials Science、Electrocatalysts for Energy Conversion、Copper-based nanomaterials and applications

High Resolution Image Download MS PowerPoint Slide Conspectus The evolution of metal oxides, a cornerstone class in heterogeneous catalysis, has progressed from bulk materials to low-dimensional structures designed to maximize active site exposure. Among them, two-dimensional (2D) metal oxide nanolayers supported on metal or oxide surfaces are particularly distinctive, as their unique geometric and electronic structures endow them with enhanced activity and controllable selectivity in catalytic reactions. Their properties are further shaped by the interface with the substrate, which can induce unusual structural characteristics such as non-stoichiometry, metastable state, structural flexibility, and charge redistribution. While extensive research has elucidated the role of the oxide–metal interface in modulating catalytic behavior, the mechanistic understanding of the oxide–oxide interface still lags far behind that of the oxide–metal interface. In this Account, we begin by outlining the construction of 2D metal oxide nanolayers with lessons learned from oxide–metal systems extending to oxide–oxide systems, while highlighting innovative construction approaches we have recently developed, including melting–wetting, reduction–wetting, and reduction–evaporation–anchoring methods. We then delve into the fundamental characteristics of metal oxide nanolayers on oxide substrate, namely, their self-limited two-dimensionality, unsaturated coordination, and metastable nature and how th...