Polymorphic Phase Engineered Structures (PPESs) for PC Energy Conversion

Photocatalytic energy conversion processes such as hydrogen evolution reaction (PC-HER), overall water splitting (PC-OWS), and carbon dioxide reduction reaction (PC-CRR) are considered promising solutions for the existing environmental and energy crisis. To achieve an efficient photocatalytic energy process, highly active materials that not only suppress the required band gap energy but also improve their photocatalytic performance should be designed and fabricated. Among many potential materials, the polymorphic phase-engineered structure (PPES) materials are gaining attention for energy processes that require crystallographic structures enabling intrinsic activity during the course of reaction that ultimately increase the overall process. The combination of different PPES materials or their noble design could advance the current photocatalytic understanding, but further studies are still warranted.