Could you find any hint about the "surplus O2" claim in that article? The only thing I found was fig. 1 which seems to imply a cycle which completely turns gluc

Could you find any hint about the "surplus O2" claim in that article? The only thing I found was fig. 1 which seems to imply a cycle which completely turns glucose and oxygen back to CO2 and water, making the whole thing a fancy solar cell without any emitted oxygen.