No abstract

No abstract

Cr(VI) reduction has been used to diminish the high toxicity of the Cr(VI) ion in the environment. Herein, electrochemical (EC) reduction was demonstrated using Au NP-loaded Ti electrodes functionalized with 2,2':6',2''-terpyridine-4'-thiol (STpy). Cyclic voltammetry tests were performed and these revealed Cr(VI) reduction potentials around 0.55, 0.35, and 0.55 V (vs Ag/AgCl) for bare Ti, Au NP-loaded Ti, and STpy-functionalized Au NP-loaded Ti (Ti-AuNP-STpy) electrodes, respectively. The reduction potential and Cr(VI) reduction performance varied with Ti oxidation state as well as surface functionalization. The EC Cr(VI) reduction using the Ti-AuNP-STpy electrode was found to have the best reduction performance. In addition, for future potential applications, the surface plasmon resonance response was also demonstrated for Cr(III) and Cr(VI) sensing over the Au-STpy surface. Thus, these novel electrode systems provide very useful information for developing improved detoxification methodologies.