Oxygen Bubbles (video) DOE/Brookhaven National Laboratory Share Print E-Mail Loading video... Caption Bubbles indicate the rapid production of oxygen (O2) when the catalyst is added to the solution. For each O2 molecule produced, four protons (H+) and four electrons are released -- enough to make two hydrogen (H2) molecules. Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.