Simultaneous depositions:

A combination of copper and lead could be determined through the deposition of copper within the presence of nitrate ions at the cathode.  The Lead is deposited as lead dioxide at the anode.

Preparative organic chemistry:

If an organic compound could undergo a series of reductions (or oxidations) every a definite potential, it is then probable to decrease the beginning material to the desired product through controlling the potential of the cathode during reduction.  The category of electrolytic reduction is much more economical than chemical reductions, whereas side reactions generate undesired products.