Modeling the Kinetics for the Electrolytic Oxidation of Manganese (II, III) Oxide

Faculty Sponsor

Robert Palumbo

College

Engineering

Discipline(s)

Mechanical Engineering

ORCID Identifier(s)

0000-0002-8026-7770

Presentation Type

Poster Presentation

Symposium Date

Summer 7-28-2016

Abstract

We are developing a finite-difference model to describe the kinetics for the electrochemical oxidation of manganese (II, III) oxide in a water splitting process. Evidence from exploratory studies using cyclic voltammetry (CV) and x-ray diffraction (XRD) suggests a reaction pathway involving diffusion and adsorption to form the desired product, manganese (III) oxide. Coupling diffusion and surface processes at the anode allows the model to determine the twelve parameters that define the kinetics of the electrochemical system. The model is consistent with experimental evidence: a fit is possible only when the model includes electron transfer with the dissolved and adsorbed electroactive species. Due to the highly non-linear equations defining the mechanism, the parameters of the fit are highly dependent on the initial guess for related values. To ensure a high level of confidence in the kinetic parameters, model outputs will be compared between concomitant techniques and with values reported in literature.

Biographical Information about Author(s)

Daniel Kotfer is a senior biology and chemistry major, and has been doing electrochemistry research in the Palumbo lab for two years. He will continue to work on the project throughout his senior year and hopes to attend medical school after graduation.

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