Was HO generated before oxygenic photosynthesis?

We obviously agree with Wu et al. that HO might accumulate in the Archean land waters devoid of Fe. We do disagree on the topic of the half-life of HO, as the work cited in support for a longer half-live is not relevant to the conditions in the Archean ocean.

Was hydrogen peroxide present before the arrival of oxygenic photosynthesis? The important role of iron(II) in the Archean ocean.

We address the chemical/biological history of HO back at the times of the Archean eon (2.5-3.9 billion years ago (Gya)).