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I'm trying to understand some basic electrochemistry as a non chemist and struggling to find the info online effectively.

Its clear that energy efficiency = Energy(useful) / Energy (input).

So, I know how to solve for energy efficiency (η) when given a quantity of product and quantity of electricity. η = product combustion energy / (power x time)

However, I'd like some help figuring out what to do with the information that is usually given in papers, so I can calculate η when it is not given.

Most papers report Faraday efficiency ( which I understood to be the moles of electrons that end on desired product/ invested moles of electrons) (the denominator here can be calculated from the current and F constant).

also given are: Catalytic surface area. Cell voltages. Over potentials. ohmic drops... etc.

For instance, I want to calculate the energy efficiency of formate production given in this paper (see image) https://www.nature.com/articles/s41467-020-17403-1/figures/3

enter image description here

Alternatively:

How to calculate the bottom line here: enter image description here

If you can explain how its done or points me to resources to learn this, that will be super helpful. Thanks, D.

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