text: The main finding of Haber and Weiss was that hydrogen peroxide (HO) is decomposed by a chain reaction.
  The Haber–Weiss reaction chain proceeds by successive steps: (i) initiation, (ii) propagation and (iii) termination.
  The chain is initiated by the Fenton reaction:
  :Fe + HO → Fe + HO + HO     (step 1: initiation)
  Then, the reaction chain propagates by means of two successive steps:
  :HO + HO → HO + O + H        (step 2: propagation)
  :O + H + HO → O + HO + HO    (step 3: propagation)
  Finally, the chain is terminated when the hydroxyl radical is scavenged by a ferrous ion:
  :Fe + HO + H → Fe + HO         (step 4: termination)
  George showed in 1947 that, in water, step 3 cannot compete with the spontaneous disproportionation of superoxide, and proposed an improved mechanism for the disappearance of hydrogen peroxide. See  for a summary. The reactions proposed therein  are:
  :Fe + HO → Fe + HO + HO    (initiation)
  :Fe + HO → Fe + HO    (termination)
  :HO + HO → HO + HO    (propagation)
  :Fe + HO → Fe + HO    (termination)
  :Fe + HO → Fe + HO + H    (termination)