1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Graphite electrode destroyed in electrolysis

  1. Jun 2, 2015 #1
    I built a Hoffman apparatus with graphite electrodes. I hooked it up to a make shift power supply from an xbox powerblock. It was filled with battery acid for the electrolyte. Now, the graphite electrode is 99% graphite rod.

    For some reason the graphite electrode on the negative(black) connection turns to powder. It stops producing gas; upon inspection, I find black mush floating in the electrolyte. Can anyone shed some light on the reason why? I'm tired of redoing this. It also happened with corrugated graphite ribbon electrodes.
  2. jcsd
  3. Jun 2, 2015 #2
    The graphite electrode turns to powder because it is made of powder. Use carbon fibers instead.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook