Characterization and electrochemical properties of iron-doped tetrahedral amorphous carbon (ta-C) thin films.

ABSTRACT: Iron-doped tetrahedral amorphous carbon thin films (Fe/ta-C) were deposited with varying iron content using a pulsed filtered cathodic vacuum arc system (p-FCVA). The aim of this study was to understand effects of iron on both the physical and electrochemical properties of the otherwise inert sp³-rich ta-C matrix. As indicated by X-ray photoelectron spectroscopy (XPS), even ∼0.4 at% surface iron had a profound electrochemical impact on both the potential window of ta-C in H₂SO₄ and KOH, as well as pseudocapacitance. It also substantially enhanced the electron transport and re-enabled facile outer sphere redox reaction kinetics in comparison to un-doped ta-C, as measured with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) using oute

SUBMITTER: Etula J 

PROVIDER: S-EPMC9083021 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature