A perspective on perovskite oxide semiconductor catalysts for gas phase photoreduction of carbon dioxide

Abstract

Photocatalytic reduction of carbon dioxide (CO 2 ) into renewable hydrocarbon fuels using solar energy has gained much attention in the effort to conserve energy and enhance carbon cycling. This paper begins with a brief description of the basic concepts of the photocatalytic reduction of CO 2 , introduces some experimental challenges in the gas photoreaction system and provides a review of perovskite oxide semiconductor catalysts, including tantalates, niobates, titanates, zirconates and cerates, for use in the gas phase photoreduction of CO 2 . The prospects for the future research of CO 2 photoreduction are also presented.

Recent Progress in Photocatalytic CO2 Reduction Over Perovskite Oxides

“…Photocatalytic CO 2 reduction is complex, leading to a diverse range of products via multi‐step reaction pathways . Equations 1–6 (Table ) list half equations to the various products commonly formed in electrochemical CO 2 reduction in water, along with the theoretical reductions potentials ( E 0 ) for each half equation referenced against the normal hydrogen electrode (NHE) at pH 7.…”

Noninvasively Modifying Band Structures of Wide‐Bandgap Metal Oxides to Boost Photocatalytic Activity

“…Semiconducting metal oxides with strong metal–oxygen bonds are a kind of important photocatalysts with high stability for targeted reactions in producing clean energy and remediating environment . One major drawback of most stable oxide photocatalysts is their too large bandgap to capture visible light that takes a large portion of around 45% in solar light spectrum .…”

Perovskites in the Energy Grid and CO2 Conversion: Current Context and Future Directions

“…For example, earth-abundant and -derived perovskite materials are used in the gas-water shift reverse chemical looping to produce chemicals. The selection of technology is often based on manufacturing complexity, availability, productivity, and ability to tune the production of particular chemicals [47], as well as environmental assessment factors [48][49][50][51][52][53][54][55][56].…”