Toward Efficient Utilization of Photogenerated Charge Carriers in Photoelectrochemical Systems: Engineering Strategies from the Atomic Level to Configuration

Chemical Reviews, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 21, 2024

Photoelectrochemical (PEC) systems are essential for solar energy conversion, addressing critical and environmental issues. However, the low efficiency in utilizing photogenerated charge carriers significantly limits overall conversion. Consequently, there is a growing focus on developing strategies to enhance photoelectrode performance. This review systematically explores recent advancements PEC system modifications, spanning from atomic nanoscopic levels configuration engineering. We delve into relationships between structures, intrinsic properties, kinetics of carriers, their utilization. Additionally, we propose future directions perspectives more efficient systems, offering valuable insights potential innovations field.

Язык: Английский

Surface Nd Sites Boost Charge Transfer of Fe₂O₃ Photoanodes for Enhanced Solar Water Oxidation

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(6), С. 9440 - 9451

Опубликована: Янв. 31, 2025

Photoelectrochemical (PEC) water splitting for hydrogen production is a promising technology sustainable energy generation. In this work, we introduce Nd sites boost the PEC performance of Fe2O3 photoanodes through precise gas-phase cation exchange process, which substitutes surface Fe atoms with Nd. The incorporation significantly enhances charge transfer properties, increases carrier concentration, and reduces internal resistance, leading to substantial increase in photocurrent density from 0.44 0.92 mA cm-2 at 1.23 VRHE. Further enhancement catalytic activity was achieved by depositing NiCo(OH)x layer 1.15 VRHE were obtained. Theoretical calculations corroborate these experimental results, revealing that doping narrows bandgap, improves separation efficiency, lowers reaction potential barrier, thereby accelerating oxidation kinetics. These findings underscore effectiveness targeted metallic element overcoming intrinsic limitations Fe2O3, providing viable pathway developing high-performance systems efficient production.

Язык: Английский

Passivation strategies for enhanced photoelectrochemical water splitting

Journal of Power Sources, Год журнала: 2024, Номер 628, С. 235860 - 235860

Опубликована: Ноя. 20, 2024

Язык: Английский