This abstract of what Hyman Hartman wrote is quite clear about:Quote
life itself created that oxygen atmosphere as a byproduct of photosynthesis.
from here: [www.ncbi.nlm.nih.gov]Quote
The origin and evolution of photosynthesis is considered to be the key to the origin of life. This eliminates the need for a soup as the synthesis of the bioorganics are to come from the fixation of carbon dioxide and nitrogen. No soup then no RNA world or Protein world.
Nice and bright day
You can not solve a problem with the same kind of thinking that you used to create it.