Electrochemical quartz crystal microbalance study of mass transport in thin film of a redox active Ni–Al–Cl layered double hydroxide

Effect of potential cycling in basic solutions on the structure of Ni–Al layered double hydroxide films

“…We have also recently reported that the mass changes during oxidation of Ni-Al-Cl LDH films measured with an EQCM were much larger when small amounts of sodium were present in the electrolyte [20]. It was postulated that in presence of sodium, charge neutralization by adsorption-desorption of sodium competed with charge neutralization by gain or loss of protons [20].…”

Mass transport in thin films of [Fe(CN)6]4− exchanged Ni–Al layered double hydroxide monitored with an electrochemical quartz crystal microbalance

“…Ni-Al-Cl was prepared as previously described [26] by titration a mixed solution of the metal ions with NaOH following the procedure of Boclair and Braterman [27]. To improve crystallinity, the slurry was aged in a 300 mL autoclave under argon at an initial pressure 100 psi and a temperature of 150°C for 18 h [1,26].…”

“…Recently, we reported on mass changes during cyclic voltammetry of Ni-Al-Cl LDH films in blank electrolyte solutions [26]. In this paper, we report on the mass responses of Ni-Al-Cl LDH films during ion exchange with [Fe(CN) 6 …”

Cyclic voltammetry of metal bipyridyl cations at redox active Ni–Al–Cl layered double hydroxide films

“…As a result, a large fraction of the anions adsorbed in LDH-modified electrodes are not electrochemically accessible. To try to improve charge transport in LDH films, we have been investigating electrode modifications with LDHs containing redox active Ni(II), Co(II) or Mn(III) metal centers [14][15][16][17][18][19][20]. We showed that electrodes modified with these redox active LDHs gave much larger voltammetric waves for [Fe(CN) 6 ] 4À , [Ru(CN) 6 ] 3À , or [Mo(CN) 8 ] 3À anions in solution than electrodes modified with redox inactive ZnAl LDH films [14][15][16].…”