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Solar‐driven photoelectrochemical (PEC) hydrogen production is one potential pathway to establish a carbon‐neutral society. Nowadays, quantum dots (QDs)‐sensitized semiconductors have emerged as promising materials for PEC hydrogen production due to their tunable bandgap by size or morphology control, displaying excellent optical and electrical properties. Nevertheless, they still suffer from anodic corrosion during long‐term cycling, offering poor stability. This Review discussed advancements to improve long‐term stability of QDs particularly in terms of cocatalysts and passivation layers. The working principle of PEC cells was reviewed, along with all important configurations adopted over recent years. The equations to assess PEC performance were also described. A greater emphasized was placed on QDs and incorporation of cocatalysts or passivation layers that could enhance the PEC performance by influencing the charge transfer and surface recombination processes. [ABSTRACT FROM AUTHOR]

Electrochemistry, hydrogen, nanomaterials, photoelectrochemistry, quantum dots Keywords: electrochemistry; hydrogen; nanomaterials; photoelectrochemistry; quantum dots EN electrochemistry hydrogen nanomaterials photoelectrochemistry quantum dots 1 1 1 02/10/23 20230208 NES 230208 B The Cover Feature b shows the strategies to improve the photoelectrochemical hydrogen evolution of quantum dot (QD)-based semiconductors (yellow balls) by applying a co-catalyst (buried grey balls) or a passivation layer (blue layers) as shown in the left electrode. [Extracted from the article]