Optimization of Electrochemical Reduction Using S.S Vials Via Mechanochemistry

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Ethan Kister
Mennatullah Mokhtar
James Mack

Abstract

By Ethan Kister, Chemistry; Mennatullah Mokhtar, University of Cincinnati


Advisor: James Mack



Presentation ID: 198


Abstract: Mechanochemistry is an increasingly popular field in chemistry where chemistry is achieved through the use of machines. One of the machines used is the high-speed ball mill. The milling media for this reaction are vials made from different materials like stainless-steel, copper, and PTFE. The reactant and reagents are added to the vial along with the ball bearing to facilitate efficient mixing. This form of chemistry has many advantages, including safety, as the chemist is separated from the reaction. Mechanochemistry offers significant environmental benefits as a small amount/no solvent is needed for the response, resulting in less production of solvent waste. Electrochemistry occurs when you have two different conductive metals immersed in an electrolyte solution, electric current is generated due to the oxidation-reduction reaction that takes place on the electrode surface. One metal undergoes oxidation (anode) while the other undergoes reduction (cathode). The presence of metal vial and metal ball bearing in contact with ionized water as electrolyte resembles the traditional electrochemical cell. Mixed metal combinations are tested in a series to relate the cell potential to reducing specific substrate. The merge between electrochemistry principles with a mechanochemical methodology of high-speed ball milling allowed for the ability to overcome the limitations of each and provide a new tool to carry out chemical reactions.

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Section
New Frontiers