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Stirring-Free Scalable Electrosynthesis Enabled by Alternating Current.

Evgeniy O Bortnikov1, Barbara S Smith2, Dmitriy M Volochnyuk3

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Alternating current (AC) electrolysis enables a novel stirring-free reactor design for efficient electrosynthesis. This versatile approach simplifies scaling up electrochemical reactions from small-scale screening to large-scale preparative applications.

Keywords:
alternating currentelectrochemical engineeringelectrochemistrygreen chemistryscale-up

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Area of Science:

  • Electrochemistry
  • Chemical Engineering

Background:

  • Alternating current (AC) electrolysis is gaining traction for its mild and selective electrochemical transformations.
  • Conventional electrochemical reactors often require stirring, complicating reactor design and scalability.

Purpose of the Study:

  • To demonstrate a stirring-free electrochemical reactor design utilizing AC electrolysis.
  • To show the scalability and versatility of this AC-enabled reactor for various electrosynthetic applications.

Main Methods:

  • Implementation of AC electrolysis in three different RVC-packed reactors.
  • Testing of redox-neutral, oxidative, and reductive electrochemical transformations.
  • Investigation of applicable frequency ranges for different reaction types.
  • Demonstration of electrosynthesis up to a 50-mmol scale.

Main Results:

  • AC electrolysis facilitated uniform electrolysis throughout the reactor volume without stirring.
  • Successful execution of diverse electrochemical transformations (redox-neutral, oxidative, reductive).
  • Demonstrated scalability using RVC-packed reactors up to 50-mmol scale.
  • Identified applicable frequency ranges for various reactions.

Conclusions:

  • The AC-enabled stirring-free reactor offers a straightforward method for scaling up electrosynthesis.
  • This design maximizes electrode surface area and eliminates the need for stirring.
  • The approach is suitable for both small-scale screening and large-scale preparative electrosynthesis with minimal optimization.