Metal-Support Interactions in Metal/Oxide Catalysts and Oxide-Metal Interactions in Oxide/Metal Inverse Catalysts

Solid catalysts usually consist of multicomponents, within which interfacial interactions have been recognized as a key factor affecting structures and catalytic performance. Metal-support interactions (MSI) have been extensively studied in oxide-supported metal catalysts (metal/oxide catalysts), in which the important concepts of strong metal-support interactions (SMSI) and electronic metal-support interactions (EMSI) have been well established and their effects on the metal catalysis have been extensively demonstrated. Recently, metal-supported oxide inverse catalysts (oxide/metal inverse catalysts) have emerged as a new type of efficient catalysts, in which the oxide-metal interactions (OMI) strongly influence the oxide catalysis. Herein we comprehensively review the progresses on the MSI of metal/oxide catalysts and OMI of oxide/metal inverse catalysts with aims to emphasize structure sensitivity of MSI and OMI and to introduce the concepts of electronic oxide-metal interactions (EOMI) and electronic oxide-metal strong interactions (EOMSI) in oxide/metal inverse catalysts, in analogy to the concepts of EMSI and SMSI in metal/oxide catalysts. First, we briefly introduce the background of the topic and the interfacial interactions between metals and oxides with emphasis on the nature of metal-support interfacial interactions depending on the electronic structures. Second, the MSI, with an emphasis on the EMSI and SMSI, in metal/oxide catalysts is reviewed with an emphasis on the recently exported size and facet effects on the electronic structures and MSI. Third, the OMI in oxide/metal inverse catalysts is reviewed with an emphasis on introducing the EOMI and EOMSI. Finally, a summary and outlook is given with emphasis on the local nature and structure sensitivity of MSI and OMI.

Automated summary

This article comprehensively reviews the progress on metal-support interactions (MSI) in metal/oxide catalysts and oxide-metal interactions (OMI) in oxide/metal inverse catalysts. It emphasizes the structure sensitivity of MSI and OMI, and introduces the concepts of electronic oxide-metal interactions (EOMI) and electronic oxide-metal strong interactions (EOMSI) in oxide/metal inverse catalysts. The article provides an overview of the background and nature of interfacial interactions between metals and oxides, reviews the MSI in metal/oxide catalysts with a focus on size and facet effects, and discusses the OMI in oxide/metal inverse catalysts with an emphasis on EOMI and EOMSI.