ArticleJournal of the American Chemical Society2025
Direct Probing the Electrical Double Layer at Graphite/Nafion Interface via Depth Profiling APXPS.
Article in Journal of the American Chemical Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Potential-dependent polaron formation activates TiONature communications · 2026Article
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Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Understanding the electrical double layer (EDL) is fundamental for enhancing the efficiency, capacity, and stability of electrochemical systems. The EDL at the electrode/polyelectrolyte interface exhibits significantly different properties with a more complex structure compared to liquid electrolyte systems. Characterizing this intricate interface experimentally remains a major challenge. In this study, we directly observed the potential distribution at the electrode-polyelectrolyte interface using a delicate in situ electrochemical cell coupled with ambient pressure X-ray photoelectron spectroscopy (APXPS) at various probing depths. The electrode/polyelectrolyte (graphite/Nafion) interface was successfully constructed, and the APXPS measurements were performed under nonpolarizing conditions. The binding energy shift of the F 1s photoelectron with applied bias provided the information on potential distribution. Experimental results, simulated by the typical exponential and linear potential distribution models, indicate the formation of a 1-3 nm EDL at the electrode/polyelectrolyte interface. This work provides methodological guidance for in situ X-ray photoelectron spectroscopic studies and offers valuable fundamental data for electrochemical research.
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Registered trials
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