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

Abstract

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 oxidesupported 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.

The Hidden Role of the Supporting Electrode for Creating Heterogeneity in Single Entity Electrochemistry

“…However, the increase in the chemidissolution timescales on the UQG ITO led us to speculate that contact between the gold and the UQG ITO shifted the chemical potential of the metal, increasing the activation barrier for the chemidissolution process and slowing the associated kinetics. Similar substrate effects have been reported on other systems, [46,47] and we are currently working to understand this effect in more detail. This result once again highlights how electrochemical contact with a supporting substrate can impact the behavior of nanoparticles, even when monitoring solution‐phase redox reactions, highlighting the importance of comparing sample behavior across different substrates before drawing quantitative structure‐function conclusions.…”

Advances in Selectivity Control for Fischer–Tropsch Synthesis to Fuels and Chemicals with High Carbon Efficiency

“…Metal–support interfaces are particularly important in designing highly efficient FTS catalysts. ,, It is suggested that the metal–support interaction (MSI) would influence the dispersion, reduction, and activation behavior of the active metal phase. The role of MSI can be attributed to the electronic and geometric effect. , On one hand, the charge transfer between the support and metal would produce a strong ionic bond and simultaneously change the electronic density of the active metal. On the other hand, the metal surface coverage of a thin layer of reducible oxides or the formation of an inactive metal–support spine compound (i.e., CoAl and CoSi) would change the geometric structure of the active site.…”

Superior efficiency of BN/Ce2O3/TiO2 nanofibers for photocatalytic hydrogen generation reactions

“…The shift of the N 1s peak to lower binding energy in BCET2 compared to the BT sample by 0.02 eV proves the engagement of BN nanosheets with Ce2O3 and TiO2 nanofibers [8]. According to the reported literatures [65], [66], [67], Ce2O3 will be stabilized through interaction by metal (Ag) and the charge transfer can stabilize Ce2O3. According to our results, there is charge transfer between Ce-Ti, and this interaction has stabilized Ce in +3 oxidation state.…”