Photocorrosion of n‐ and p‐Type Semiconducting Oxide‐Covered Metals: Case Studies of Anodized Titanium and Copper

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/pssa.202100852.

Photocorrosion of Hematite Photoanodes in Neutral and Alkaline Electrolytes

“…The selected pHs are the most commonly used to characterize Fe 2 O 3 photoanodes. − ,, Unlike the majority of previous reports of PEC-ICP-MS measurements using light-emitting diodes with an irradiance output different from the solar irradiance spectrum, − ,− this setup allows studying the photocorrosion phenomena under realistic irradiation conditions (AM 1.5G 100 mW cm –2 light intensity) that match well with the ones used widely in the PEC literature. ,, …”

“…Several works have revealed the increased photocorrosion of Fe 2 O 3 in acidic electrolytes. ,− However, detailed information about the rates of Fe dissolution and its dependence on the electrolyte species and pH is still missing. This knowledge is of relevance since Fe 2 O 3 has been used to construct photoanodes to drive the PEC water splitting in mild conditions (neutral electrolytes). − Recently, coupling on-line inductively coupled plasma mass spectrometry (ICP-MS) to PEC measurements has provided novel insights into the light-triggered photodegradation of WO 3 , BiVO 4 , and TiO 2 photoanodes, − proving to be an excellent approach to reveal different degradation pathways.…”