Hole Transport Layer in Photoelectrochemical Water Splitting

Abstract

Photoelectrochemical water splitting is a promising approach to produce green and renewable hydrogen fuel, alleviating the CO2 emissions, air pollution and energy crisis. However, the efficiency is limited by the recombination of photogenerated carriers and the losses of holes, resulting in a mismatch between the rates of water oxidation and reduction reactions. This paper starts with a discussion of the principle of photoelectrochemical water splitting, highlighting the role and importance of holes, and then summarize the development of the hole transport layer, with a focus on the classification of the hole transport layer, the structure and properties of common hole transport materials, and the construction and improvement of the hole transport layer. Finally, we conclude with a summary and perspective of strategies for the future development of the hole transport layer.This article is protected by copyright. All rights reserved.

Preparation and Photocatalytic Hydrogen Evolution Performance Study of NENU‐5/CuBr/Graphdiyne Tandem S‐Scheme Heterojunction

“…These semiconductor photocatalysts are subject to stringent requirements, needing not only to meet the energy band criteria for water decomposition but also to be environmentally friendly. [3][4][5] Traditional photocatalysts often fail to maximize catalytic efficiency due to inherent flaws in conductivity, stability, and other performance aspects. Therefore, the development of affordable, stable, and well-performing semiconductor photocatalysts is crucial for improving the efficiency of photocatalytic hydrogen production from water, signifying a vital step toward enhancing the viability of this clean energy technology.…”