In various fields such as organic synthesis , medicinal chemistry , polymer chemistry , electrocatalysis , spintronics or batteries , the key role of TEMPO derivatives no longer needs to be demonstrated. For specific applications, particularly in electrocatalysis, immobilizing this motif on solid supports has emerged as a convenient method to facilitate its separation from the reaction medium . Many strategies have been deployed to engineer such functional supports, ranging from encapsulation in polymer matrices , to the physisorption of conductive polymers featuring aminoxyl functionality , as well as the formation of covalent bonds. Among these approaches, covalently attaching the motif of interest directly to the surface can offer distinct advantages in stability. Noteworthy examples include the formation of amide bonds between (amino-or carboxy-)TEMPO and carbon felt , the coupling between (carboxy-or 4ethynylphenyl)carbamoyl-)TEMPO and (amino-or azido-)functionalized electrodes , or the elaboration of self-assembled monolayers (SAMs) on gold . While the former methods showcased a robust electrode/molecule bond, the latter, although featuring a slightly less robust bond, provided precise control over electrocatalytic properties depending on the layer structure. To combine stability with precise control of interfacial reactivity, a grafting strategy was developed based on the reduction of diazonium salts designed to mimic the structure of SAM precursors. This entailed the insertion of a 12-carbon alkyl chain between the aryldiazonium and the TEMPO motif.