This book introduces readers to the preparation of two-dimensional metal sulfide/oxide for CO
2
photoreduction. Based on two-dimensional metal sulfide/oxide materials, this book establishes the structure-to-property relationships of phoatalyst for CO
photoreduction, and reveals the intrinsic mechanism of the CO
photoreduction by virtue of the in situ characterization techniques and the density functional theory calculations. It is anticipated that this book will help to identify empirical guidelines for designing and fabricating high-performance catalysts of solar-driven CO
reduction.