The release of CO2 happens during the Krebs Cycle and oxidative phosphorylation is the term used to define the energy released from the cascading reactions that drives the highly efficient producation of APTs at the ETC. The only molecules associated with oxidative phosphorylation are the high energy molecules and oxygen to form water at the end. No CO2 in there at all.
This question is a little confusing because during Krebs Cycle at 2 different stages, CO2 and NADH2 are made after the reduction of NAD in 1 step.
In biochemistry, there are 2 fundamental ways to provide energy (make ATP)
1) substrate level phosphorylation (this is what happens in glycolysis, cause your directly sticking a phosphate on ADP to make ATP)
2) Oxidative phosphorylation (the thing in question here). This is how ATP is produced in the Electron Trans chain. It has to do with the creation of a proton motive force. Like Frederico Albin said, CO2 release has NOTHING to do with oxidative phosphorylation, cause the release of CO2 is another process (krebs cycle)