Electro-oxidation of amino-functionalized multiwalled carbon nanotubes
We report the electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the pH range from 0.3 to 6.4 using quantitative cyclic voltammetry (CV) and single entity electrochemistry measurements, making comparison with non-functionalized MWCNTs. CV showed the latter to both...
| Príomhchruthaitheoirí: | , , |
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| Formáid: | Journal article |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
Royal Society of Chemistry
2022
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| _version_ | 1826308178343624704 |
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| author | Lu, Y Li, X Compton, RG |
| author_facet | Lu, Y Li, X Compton, RG |
| author_sort | Lu, Y |
| collection | OXFORD |
| description | We report the electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the pH range from 0.3 to 6.4 using quantitative cyclic voltammetry (CV) and single entity electrochemistry measurements, making comparison with non-functionalized MWCNTs. CV showed the latter to both catalyze the solvent (water) decomposition and to undergo irreversible electro-oxidation forming oxygen containing surface functionality. The MWCNTs-NH2 additionally undergo an irreversible oxidation to an extent which is dependent on the pH of the solution, reflecting the variable amount of deprotonated amino groups present as a function of pH. Nano-impact experiments conducted at the single particle level confirmed the oxidation of both types of MWCNTs, showing agreement with the CV. The pKa of the amino groups in MWCNTs was determined via both electrochemical methods giving consistent values of ca. 2.5. |
| first_indexed | 2024-03-07T07:15:38Z |
| format | Journal article |
| id | oxford-uuid:a0a807b3-8549-4756-ba89-71a7b341465c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:15:38Z |
| publishDate | 2022 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:a0a807b3-8549-4756-ba89-71a7b341465c2022-08-04T12:07:21ZElectro-oxidation of amino-functionalized multiwalled carbon nanotubesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a0a807b3-8549-4756-ba89-71a7b341465cEnglishSymplectic ElementsRoyal Society of Chemistry2022Lu, YLi, XCompton, RGWe report the electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the pH range from 0.3 to 6.4 using quantitative cyclic voltammetry (CV) and single entity electrochemistry measurements, making comparison with non-functionalized MWCNTs. CV showed the latter to both catalyze the solvent (water) decomposition and to undergo irreversible electro-oxidation forming oxygen containing surface functionality. The MWCNTs-NH2 additionally undergo an irreversible oxidation to an extent which is dependent on the pH of the solution, reflecting the variable amount of deprotonated amino groups present as a function of pH. Nano-impact experiments conducted at the single particle level confirmed the oxidation of both types of MWCNTs, showing agreement with the CV. The pKa of the amino groups in MWCNTs was determined via both electrochemical methods giving consistent values of ca. 2.5. |
| spellingShingle | Lu, Y Li, X Compton, RG Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title | Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title_full | Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title_fullStr | Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title_full_unstemmed | Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title_short | Electro-oxidation of amino-functionalized multiwalled carbon nanotubes |
| title_sort | electro oxidation of amino functionalized multiwalled carbon nanotubes |
| work_keys_str_mv | AT luy electrooxidationofaminofunctionalizedmultiwalledcarbonnanotubes AT lix electrooxidationofaminofunctionalizedmultiwalledcarbonnanotubes AT comptonrg electrooxidationofaminofunctionalizedmultiwalledcarbonnanotubes |