Scalable and sustainable methods for fabricating stable photoelectrodes are essential for advancing solar-driven water splitting. Here, an automated aqueous deposition approach is demonstrated, which is named “Autodrop”, for the fabrication of BiVO4–FePO4 photoanodes via a modified successive ion layer adsorption and reaction (SILAR) process. The method enables precise control over film thickness and morphology using low-toxicity precursors and ambient conditions. The integration of an amorphous FePO4 layer on top of the BiVO4 photo-absorber serves as both a passivation coating and co-catalyst, resulting in a 50% photocurrent increase and excellent operational stability, with over 80% of the initial current retained after 2 h of continuous chronoamperometry under AM 1.5G illumination at 1.23 V versus RHE. These results establish Autodrop as a versatile platform for scalable, multi-layer photoelectrode fabrication, supporting the development of next-generation PEC devices.

Autodrop‐Enabled Aqueous Deposition of BiVO4–FePO4 Photoanodes for Stable Water Splitting / Altieri, Roberto; Crisci, Matteo; Schlettwein, Derck; Smarsly, Bernd; Lamberti, Francesco; Gatti, Teresa; Wang, Mengjiao. - In: ADVANCED MATERIALS TECHNOLOGIES. - ISSN 2365-709X. - (2025). [10.1002/admt.202500672]

Autodrop‐Enabled Aqueous Deposition of BiVO4–FePO4 Photoanodes for Stable Water Splitting

Gatti, Teresa;Wang, Mengjiao
2025

Abstract

Scalable and sustainable methods for fabricating stable photoelectrodes are essential for advancing solar-driven water splitting. Here, an automated aqueous deposition approach is demonstrated, which is named “Autodrop”, for the fabrication of BiVO4–FePO4 photoanodes via a modified successive ion layer adsorption and reaction (SILAR) process. The method enables precise control over film thickness and morphology using low-toxicity precursors and ambient conditions. The integration of an amorphous FePO4 layer on top of the BiVO4 photo-absorber serves as both a passivation coating and co-catalyst, resulting in a 50% photocurrent increase and excellent operational stability, with over 80% of the initial current retained after 2 h of continuous chronoamperometry under AM 1.5G illumination at 1.23 V versus RHE. These results establish Autodrop as a versatile platform for scalable, multi-layer photoelectrode fabrication, supporting the development of next-generation PEC devices.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/3001725