Inherent electrochemistry and charge transfer properties of few-layered two-dimensional Ti3C2Tx MXene. Issue 36 (21st June 2018) - Nayak, Pranati
Abstract : Few-layered Ti3 C2 T x MXene undergoes more electro-oxidation in positive potential window and aqueous medium compared to a multi-layered and bulk 3D stack of Ti3 C2 T x layers. Abstract : We report the effect of the Ti3 C2 T x MXene flake thickness on its inherent electrochemistry and heterogeneous charge transfer characteristics. It is shown that Ti3 C2 T x undergoes irreversible oxidation in a positive potential window, which strongly depends on the flake thickness and pH of the electrolyte. Few-layered Ti3 C2 T x exhibits faster electron transfer kinetics ( k 0 = 0.09533 cm s −1 ) with a [Fe(CN)6 ] 4−/3− redox mediator compared to multi-layered Ti3 C2 T x ( k 0 = 0.00503 cm s −1 ). In addition, the few-layered free standing Ti3 C2 T x film electrode remains intact after enduring irreversible oxidation.