I do not understand what the meaning is of the unit


which I have come across in reading about the theory of fuel cells.

In simple terms, what does this unit mean?

  • 4
    $\begingroup$ Milligrams of platinum per square centimeter. $\endgroup$ Commented Sep 29, 2016 at 16:10
  • 1
    $\begingroup$ This isn't really homework, is it close voters? It's just a misguided asker. $\endgroup$
    – M.A.R.
    Commented Sep 29, 2016 at 17:16

1 Answer 1


The unit in question means milligrams of platinum per square centimeter.

In your application - fuel cells, and specifically the membranes used to fabricate them - it describes how much of the metal is present per square centimeter of membrane.


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