Can someone please explain to me what is meant by an electrochemical reaction step and how it differs from a nonelectrochemical reaction step in the same overall reaction in the context of electrocatalysis?

A simple example with H2 or H2O would be sufficient.

  • $\begingroup$ $\ce{H^+ + OH^- <=> H2O}$ is a "nonelectrochemical" reaction step $\endgroup$
    – MaxW
    Commented Jul 27, 2018 at 13:55
  • $\begingroup$ And electrolysis of $\ce{H2SO4}$ in water is electrochemical. See bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/… $\endgroup$ Commented Jul 27, 2018 at 21:18
  • 1
    $\begingroup$ @MaxW can you please elaborate why it is not an electrochemical step. To me it seems that two charged species interacted. This is the confusing part for me. Is there a definition one can use? $\endgroup$
    – koroma
    Commented Jul 28, 2018 at 1:07


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