Noncopper Photocatalysts for Visible‐Light‐Driven Conversion of CO 2 into C2 + Products

Photocatalytic CO 2 fixation into value‐added chemicals can not only mitigate the greenhouse effect but also alleviate the energy crisis. In the field of photocatalytic CO 2 reduction, copper‐based photocatalysts have been intensively studied for producing value‐added multi‐carbon (C2+) products. In view of this, noncopper‐based photocatalysts under visible light irradiation are summarized and reviewed herein. First, the principles on how to realize C–C coupling on photocatalysts' surfaces are discussed. In the following, different strategies for making photocatalysts to absorb visible light and enable C–C coupling, including alloying, layered structures, single atoms, forming spinel structures, and so on, are outlined and discussed. In order to materialize visible light utilization and C–C coupling, the advantages and disadvantages of these strategies are commented. To conclude, we provide insights into the prospects and potential advancements for the visible‐light‐driven CO 2 conversion to C2+ products.