Luminescence Thermometry Probes Local Heat Effects at the Platinum Electrode Surface during Alkaline Water Electrolysis

Thimo S. Jacobs, Sunghak Park, Marco Schönig, Bert M. Weckhuysen, Marc T.M. Koper*, Ward van der Stam*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Accurate determination of the temperature dynamics at the electrode surface is crucial for advancing electrocatalysis, particularly in the development of stable materials that aid energy conversion and storage technologies. Here, lanthanide-based in situ luminescence thermometry was used to probe local heat effects at the platinum electrode surface during alkaline water electrolysis. It is demonstrated that the oxygen evolution reaction (OER) induces a more significant temperature increase compared to the hydrogen evolution reaction (HER) under the same electrochemical conditions. This difference is attributed to variations in overpotential heating and local effects on Joule heating. Furthermore, local heat effects are not observed at increased electrolyte concentrations during the HER, whereas substantial temperature variations (up to 2 K) are detected for the OER at higher electrolyte concentrations. Our observations highlight the potential of in situ luminescence thermometry to measure interfacial temperature effects during electrocatalytic reactions.

Original languageEnglish
Pages (from-to)3335-3341
Number of pages7
JournalACS Energy Letters
Volume9
Issue number7
DOIs
Publication statusPublished - Jun 2024

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