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The Pre-exponential Factor in Electrochemistry.

Zheng-Da He1, Yan-Xia Chen1, Elizabeth Santos2,3

  • 1Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, China.

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|February 28, 2018
PubMed
Summary
This summary is machine-generated.

The pre-exponential factor in electrochemistry, a key concept in reaction kinetics, is poised for a resurgence. Advances in electrocatalysis suggest a new era of research for this fundamental kinetic parameter.

Keywords:
Kramers theoryelectrocatalysiselectron transferhydrogen evolutionpre-exponential factor

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Area of Science:

  • Electrochemistry
  • Chemical Kinetics
  • Electrocatalysis

Background:

  • Electrochemical research topics often experience cycles of interest, fading and returning with new technological advancements.
  • The pre-exponential factor, a fundamental concept in chemical kinetics, has seen two previous research cycles.
  • Early interpretations relied on transition-state theory, followed by a resurgence linked to Kramers theory for condensed phases.

Purpose of the Study:

  • To highlight the cyclical nature of research topics in electrochemistry, using the pre-exponential factor as a case study.
  • To propose that recent advancements in electrocatalysis warrant a third research cycle for understanding the pre-exponential factor.

Main Methods:

  • Review of historical developments in electrochemical kinetics.
  • Analysis of the theoretical underpinnings of the pre-exponential factor, including transition-state theory and Kramers theory.
  • Exploration of recent progress in electrocatalysis relevant to kinetic studies.

Main Results:

  • The pre-exponential factor has historically followed research cycles driven by theoretical and experimental innovations.
  • Current progress in electrocatalysis offers new avenues for investigating the pre-exponential factor.
  • The field is at a juncture for a renewed focus on this fundamental kinetic parameter.

Conclusions:

  • The pre-exponential factor in electrochemical kinetics is a topic ripe for a third research cycle.
  • Recent advancements in electrocatalysis provide novel opportunities for its investigation.
  • This renewed focus promises to deepen our understanding of electrochemical reaction mechanisms.