Electrochemical reduction of trinitrotoluene on core–shell tin–carbon electrodes

摘要: Abstract In this work, we studied the electrochemical process of 2,4,6-trinitrotoluene (TNT) reduction on a new type electrodes based core–shell tin–carbon Sn ( C ) structure . The Sn(C) composite was prepared from precursor tetramethyl-tin Sn(CH 3 4 , and product contained core submicron-sized tin particles uniformly enveloped with carbon shells. Cyclic voltammograms in aqueous sodium chloride solutions containing TNT show three well-pronounced waves potential range −0.50 to −0.80 V vs an Ag/AgCl/Cl − reference electrode) that correspond multistep reduction. Electrodes annealed at 800 °C under argon develop higher voltammetric currents (comparing as-prepared material) due stabilization shell. It is suggested electrochemically irreversible process. A partial oxidation products occurred around −0.20 V. response shows it not controlled by diffusion active species to/from but rather interfacial charge transfer possible adsorption phenomena. demonstrate significantly stable behavior for NaCl provide sufficient reproducibility no surface fouling through prolonged cycling. presumed nanoparticles, which constitute core, are inactive towards reduction, or SnO 2 formed during may participate reaction as catalysts carbon-modifying agents. nitro-groups can be reduced irreversibly via two paths) six-electron transfers, 2,4,6-triaminotoluene, follows mass-spectrometric studies. described herein serve amperometric sensors detection trace TNT.