Photoelectrocatalytic Reduction of CO2 into C1 Products by Using Modified-Semiconductor-Based Catalyst Systems

Recent developments in the photoelectrochemical (PEC) reduction of CO2 have helped to harness its potential as a versatile feedstock for the generation of alternative fuels. In this regard, the emergence of hybrid semiconductor- based photocathodes in conjunction with metal cocatalysts, metal fabrications, and other photoanodes are noteworthy, owing to their efficient catalytic conversions and appreciable selectivities. Since its discovery in 1978, a series of reports have aided the production of CO, HCOOH, MeOH, and CH4 through the reduction of CO2 by using hybrid semiconductor- based systems. This Focus Review highlights some of the major developments from the past few years with the aim of fostering further scientific perception of the true potential of this research area and encouraging future research investigations.