Oxide based Heterostructured Photocatalysts for CO ₂ Reduction and Hydrogen Generation

Abstract Global warming and its cause and effects have necessitated the researchers to look beyond fossil and its derivatives. The scalability of CO 2 reduction and H 2 energy is one of the most enigmatic questions asked by the calamitous environmental changes happening across the world such as bushfires in Australia, Amazon and California or the melting of Arctic and Antarctic ice scalps. Thus, the research fraternity is keen to elevate the efficiency of CO 2 reduction and H 2 energy to the extent that the good chemical livestock produced by CO 2 conversion and H 2 fuel would become principal energy resources. In this quest, photocatalytic pathway envisions the environmentally benign protocol to bring about CO 2 reduction and H 2 production. Photo‐reduction of CO 2 and H 2 generation via photocatalytic water splitting by utilizing oxide based heterostructured photocatalysts are the promising approaches to carry out CO 2 mitigation and H 2 production efficiently ascribed to the advanced optoelectronic and structural superiority of oxides photocatalysts as discussed in this review.

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