Recent Advances in Photocatalytic CO₂ Reduction into Valuable Products Using Nickel-Based Metal-Organic Frameworks

The conversion of carbon dioxide into valuable chemicals through photochemical processes has been considered to be a potential technique to address environmental challenges. A good number of MOFs-based nickel (Ni-MOFs) compounds have garnered significant interest in the photocatalytic reduction of CO₂ due to their abundant active sites, tunable structure, the good affinity between CO₂, Ni elements, and other properties. This mini-review summarizes the different works on using Ni-MOFs as catalysts for the photocatalytic reduction of CO₂ by focusing on applying pristine, monometallic, and multimetallic Ni-MOFs. The advantages of combining Ni-MOFs with other potential semiconductors and their derivatives in improving the photocatalytic activity of the CO₂ reduction will also be discussed. Moreover, the challenges and opportunities associated with this class of materials for photocatalytic CO₂ reduction will be debated to inspire further research in this emerging field.