cm6b01420_si_001.pdf (2.98 MB)
On How Experimental Conditions Affect the Electrochemical Response of Disordered Nickel Oxyhydroxide Films
journal contribution
posted on 2016-08-12, 13:49 authored by Rodney
D. L. Smith, Rebecca S. Sherbo, Kevan E. Dettelbach, Curtis P. BerlinguetteAn electrochemical conditioning protocol
was developed for studying
amorphous phases of nickel hydroxide films (NiOx) that renders congruent and reproducible redox behavior that
enables more standardized mechanistic studies. Dynamic oxidative behavior
was measured for the conditioned films, where the initial peak associated
with the oxidation of NiOx contains 1.3–2.0
times the charge for that measured in subsequent oxidative scans and
the corresponding reductive peak. It is shown that charge trapping
does not fully account for this excess charge. The magnitude of excess
anodic charge is affected by pH, OH– diffusion through
the film, and voltammetric scan rates.