Silver Electrodeposition from Ag/AgCl Electrodes: Implications for Nanoscience
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908398514077696 |
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| author | Chen, Chuhongxu Wang, Ziwei Chen, Guilin Zhang, Zhijia Bedran, Zakhar Tipper, Stephen Dıaz-Nunez, Pablo Timokhin, Ivan Mishchenko, Artem Yang, Qian |
| author_facet | Chen, Chuhongxu Wang, Ziwei Chen, Guilin Zhang, Zhijia Bedran, Zakhar Tipper, Stephen Dıaz-Nunez, Pablo Timokhin, Ivan Mishchenko, Artem Yang, Qian |
| contents | With the advancement of nanoscience, silver/silver chloride (Ag/AgCl) electrodes have become widely utilised in microscale and nanoscale fluidic experiments, because of their stability. However, our findings reveal that the dissolution of AgCl from the electrode in \ch{Cl-}-rich solutions can lead to significant silver contamination, through the formation of silver complexes, \ch{[AgCl_{n+1}]^{n-}}. We demonstrate the electrodeposition of silver particles on graphene in KCl aqueous solution, with AgCl dissolution from the electrode as the sole source of silver. This unexpected electrodeposition process offers a more plausible interpretation of the recently reported ``ionic flow-induced current in graphene''. That is, the measured electronic current in graphene is due to the electrodeposition of silver, challenging the previously claimed ``ionic Coulomb drag''. More caution is called for when using Ag/AgCl electrodes in microfluidic, and especially nanofluidic systems, because AgCl dissolution should not be neglected. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_16597 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Silver Electrodeposition from Ag/AgCl Electrodes: Implications for Nanoscience Chen, Chuhongxu Wang, Ziwei Chen, Guilin Zhang, Zhijia Bedran, Zakhar Tipper, Stephen Dıaz-Nunez, Pablo Timokhin, Ivan Mishchenko, Artem Yang, Qian Mesoscale and Nanoscale Physics Chemical Physics With the advancement of nanoscience, silver/silver chloride (Ag/AgCl) electrodes have become widely utilised in microscale and nanoscale fluidic experiments, because of their stability. However, our findings reveal that the dissolution of AgCl from the electrode in \ch{Cl-}-rich solutions can lead to significant silver contamination, through the formation of silver complexes, \ch{[AgCl_{n+1}]^{n-}}. We demonstrate the electrodeposition of silver particles on graphene in KCl aqueous solution, with AgCl dissolution from the electrode as the sole source of silver. This unexpected electrodeposition process offers a more plausible interpretation of the recently reported ``ionic flow-induced current in graphene''. That is, the measured electronic current in graphene is due to the electrodeposition of silver, challenging the previously claimed ``ionic Coulomb drag''. More caution is called for when using Ag/AgCl electrodes in microfluidic, and especially nanofluidic systems, because AgCl dissolution should not be neglected. |
| title | Silver Electrodeposition from Ag/AgCl Electrodes: Implications for Nanoscience |
| topic | Mesoscale and Nanoscale Physics Chemical Physics |
| url | https://arxiv.org/abs/2505.16597 |