CO2 Hydrogenation on Metal-Organic Frameworks-Based Catalysts: A Mini Review

Abstract

Conversion of carbon dioxide (CO₂) into value-added fuels and chemicals can not only reduce the emission amount of CO₂ in the atmosphere and alleviate the greenhouse effect but also realize carbon recycling. Through hydrogenation with renewable hydrogen (H₂), CO₂ can be transformed into various hydrocarbons and oxygenates, including methanol, ethanol, methane and light olefins, etc. Recently, metal-organic frameworks (MOFs) have attracted extensive attention in the fields of adsorption, gas separation, and catalysis due to their high surface area, abundant metal sites, and tunable metal-support interface interaction. In CO₂ hydrogenation, MOFs are regarded as important supports or sacrificed precursors for the preparation of high-efficient catalysts, which can uniformly disperse metal nanoparticles (NPs) and enhance the interaction between metal and support to prevent sintering and aggregation of active metal species. This work summarizes the recent process on hydrogenation of CO₂ to methanol, methane and other C₂₊ products over various MOFs-based catalysts, and it will provide some dues for the design of MOFs materials in energy-efficient conversion and utilization.

Keywords: C2+ Products; CO2 hydrogenation; MOFs; methane; methanol.

FIGURE 1

CO₂ hydrogenation over various MOFs-based catalysts. (A) Interface bonding of sub-nanometer Cu clusters with Zr₆O₈ nodes over Cu/UiO-66 and its catalytic results in CO₂ hydrogenation to methanol. Reproduced with permission from Zhu et al. (2020). Copyright 2020 Springer Nature. (B) The Cu/ZnO_x NPs embedded UiO-bpy and its catalytic results in CO₂ hydrogenation to methanol. Reproduced with permission from An et al. (2017). Copyright 2017 American Chemical Society. (C) Structural evolution in the decomposition process of Ru/UiO-66 and its catalytic results obtained material for CO₂ hydrogenation to CH₄. Reproduced with permission from Lippi et al. (2017). Copyright 2017 Royal Society of Chemistry. (D) Fe/C-K catalyst fabricated through decomposition of Basolite F300 MOF and its catalytic results obtained material for CO₂ hydrogenation to CH₄. Reproduced with permission from Ramirez et al. (2018). Copyright 2018 American Chemical Society.