Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte
Abstract Understanding the performance of graphene devices in contact with highly concentrated aqueous electrolytes is key to integrating graphene into next-generation devices operating in sea water environments, biosensors, and high-density energy production/storage units. Despite significant effor...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-09-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-023-00431-y |
| _version_ | 1797559354731266048 |
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| author | Shayan Angizi Lea Hong Xianxuan Huang P. Ravi Selvaganapathy Peter Kruse |
| author_facet | Shayan Angizi Lea Hong Xianxuan Huang P. Ravi Selvaganapathy Peter Kruse |
| author_sort | Shayan Angizi |
| collection | DOAJ |
| description | Abstract Understanding the performance of graphene devices in contact with highly concentrated aqueous electrolytes is key to integrating graphene into next-generation devices operating in sea water environments, biosensors, and high-density energy production/storage units. Despite significant efforts toward interpreting the structure of the electrochemical double layer at high concentrations, the interface between graphene-based materials and concentrated aqueous solutions has remained vaguely described. In this study, we demonstrate the use of graphene-based chemiresistors as a technique to indirectly quantify the experimental screening length of concentrated electrolytes that could clarify the interpretation of electrochemical measurements conducted at low ionic strength. We report a breakdown of the Debye–Hückel theory in the proximity of graphene surfaces at lower concentrations (10–50 mM) than previously reported for other systems, depending on cation size, dissolved oxygen concentration, and degree of graphene defectivity. |
| first_indexed | 2024-03-10T17:44:11Z |
| format | Article |
| id | doaj.art-b9f51760d9ee4463b0490e96c8ad7462 |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-03-10T17:44:11Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-b9f51760d9ee4463b0490e96c8ad74622023-11-20T09:35:39ZengNature Portfolionpj 2D Materials and Applications2397-71322023-09-01711910.1038/s41699-023-00431-yGraphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyteShayan Angizi0Lea Hong1Xianxuan Huang2P. Ravi Selvaganapathy3Peter Kruse4Department of Chemistry and Chemical Biology, McMaster UniversityDepartment of Chemistry and Chemical Biology, McMaster UniversityDepartment of Chemistry and Chemical Biology, McMaster UniversityDepartment of Mechanical Engineering, McMaster UniversityDepartment of Chemistry and Chemical Biology, McMaster UniversityAbstract Understanding the performance of graphene devices in contact with highly concentrated aqueous electrolytes is key to integrating graphene into next-generation devices operating in sea water environments, biosensors, and high-density energy production/storage units. Despite significant efforts toward interpreting the structure of the electrochemical double layer at high concentrations, the interface between graphene-based materials and concentrated aqueous solutions has remained vaguely described. In this study, we demonstrate the use of graphene-based chemiresistors as a technique to indirectly quantify the experimental screening length of concentrated electrolytes that could clarify the interpretation of electrochemical measurements conducted at low ionic strength. We report a breakdown of the Debye–Hückel theory in the proximity of graphene surfaces at lower concentrations (10–50 mM) than previously reported for other systems, depending on cation size, dissolved oxygen concentration, and degree of graphene defectivity.https://doi.org/10.1038/s41699-023-00431-y |
| spellingShingle | Shayan Angizi Lea Hong Xianxuan Huang P. Ravi Selvaganapathy Peter Kruse Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte npj 2D Materials and Applications |
| title | Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte |
| title_full | Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte |
| title_fullStr | Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte |
| title_full_unstemmed | Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte |
| title_short | Graphene versus concentrated aqueous electrolytes: the role of the electrochemical double layer in determining the screening length of an electrolyte |
| title_sort | graphene versus concentrated aqueous electrolytes the role of the electrochemical double layer in determining the screening length of an electrolyte |
| url | https://doi.org/10.1038/s41699-023-00431-y |
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