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the claim

Positive ions migrate toward the cathode during electrolysis

the verdict
COMMON KNOWLEDGE
Legacy classification; evidence review pending
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that positive ions migrate toward the cathode during electrolysis?

Positive ions migrate toward the cathode during electrolysis as a fundamental electrochemical principle required for charge neutrality and reduction reactions.

Verdict: COMMON KNOWLEDGE · 5 sources for, 0 against · Last checked

The analysis

The claim is a fundamental electrochemical fact: positively charged ions (cations) are attracted to the negatively charged cathode during electrolysis. The retrieved papers consistently document this phenomenon across various electrochemical and microbial electrolysis systems (e.g., migration of nickel and ammonium ions to the cathode). Because this is a well-established scientific fact of direct everyday/foundational observation in electrochemistry, the verdict is COMMON_KNOWLEDGE, and the supporting papers confirm instances of this process.

Evidence for · 5
Removal of low concentrations of nickel ions in electroplating wastewater by combination of electrodialysis and electrodeposition.
2021
The study discusses nickel ions migrating toward the cathode during electrodeposition and electrolysis.
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Wang, C., Li, T., Yu, G., & Deng, S. (2021). Removal of low concentrations of nickel ions in electroplating wastewater by combination of electrodialysis and electrodeposition.. doi.org. https://doi.org/10.1016/j.chemosphere.2020.128208

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More for · 4
Two-side cathode microbial electrolysis cell for nutrients recovery and biogas upgrading
2019
The research highlights the migration of ammonium ions toward the cathode in a microbial electrolysis cell.
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Zeppilli, M., Simoni, M., Paiano, P., & Majone, M. (2019). Two-side cathode microbial electrolysis cell for nutrients recovery and biogas upgrading. doi.org. https://doi.org/10.1016/J.CEJ.2019.03.119

Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane
2014
The paper notes that power mediates ammonium migration toward the cathode in an electrolysis cell.
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Haddadi, S., Nabi-Bidhendi, G., & Mehrdadi, N. (2014). Nitrogen removal from wastewater through microbial electrolysis cells and cation exchange membrane. doi.org. https://doi.org/10.1186/2052-336X-12-48

Potentiostatic vs galvanostatic operation of a Microbial Electrolysis Cell for ammonium recovery and biogas upgrading
2020
The study examines ammonium migration toward the cathode in a three-chamber microbial electrolysis cell.
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Zeppilli, M., Cristiani, L., Dell’Armi, E., & Villano, M. (2020). Potentiostatic vs galvanostatic operation of a Microbial Electrolysis Cell for ammonium recovery and biogas upgrading. doi.org. https://doi.org/10.1016/j.bej.2020.107886

The Potential of Electrodialysis with Mediating Solution (EDM) for Eliminating Alkaline Scaling: Experimental Validation and Mechanistic Elucidation.
2025
The paper discusses the migration of divalent cations from the feedwater into the catholyte during electrolysis.
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Liu, H., Foo, Z. H., & She, Q. (2025). The Potential of Electrodialysis with Mediating Solution (EDM) for Eliminating Alkaline Scaling: Experimental Validation and Mechanistic Elucidation.. doi.org. https://doi.org/10.1021/acs.est.4c12907

What does the evidence say?

The claim is a fundamental electrochemical fact: positively charged ions (cations) are attracted to the negatively charged cathode during electrolysis. The retrieved papers consistently document this phenomenon across various electrochemical and microbial electrolysis systems (e.g., migration of nickel and ammonium ions to the cathode). Because this is a well-established scientific fact of direct everyday/foundational observation in electrochemistry, the verdict is COMMON_KNOWLEDGE, and the supporting papers confirm instances of this process.

Receipt History
first checked06 Aug 2026
judged → COMMON KNOWLEDGE · 8606 Aug 2026
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