Cation and anion electrochemically assisted solid-state transformations of malachite green.

Phys Chem Chem Phys

Institut de Restauració del Patrimoni, Universitat Politècnica de València, Camí de Vera 14, 46022, València, Spain.

Published: January 2020

AI Article Synopsis

  • The study explores how electrochemical methods can promote solid-to-solid transformations, focusing on malachite green dye in a NaCl electrolyte.
  • Electrochemical tests reveal notable differences between solid-phase and solution-phase behaviors of the dye.
  • Techniques like voltammetry and advanced microscopy are used to analyze processes like oxidative dissolution and ion insertions, with discussions on the thermochemistry related to ion and electron transport.

Article Abstract

The possibility of the electrochemical promotion of different solid-to-solid transformations including the performance of successive cation and anion insertion processes has been tested using malachite green, a triphenylmethane dye, in contact with aqueous NaCl electrolyte. Electrochemical data using the voltammetry of microparticles methodology reveal significant differences with the solution phase electrochemistry of the dye. Voltammetric data, combined with atomic force microscopy, focusing ion beam-field emission scanning electron microscopy, and high-resolution field emission scanning electron microscopy permit characterization of the oxidative dissolution, oxidation with anion insertion, reduction with cation insertion and reduction with anion issue processes, whose thermochemical aspects, involving separate ion and electron transport contributions, are discussed.

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http://dx.doi.org/10.1039/c9cp05835dDOI Listing

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