A Potential-Dependent Switch (IMAGE) Boston College Caption A potential-dependent switch aids water-splitting using cobalt-oxide catalysts, Boston College and Yale University researchers report in the journal Chem. Small electrical charge drives an oxygen evolution reaction that uses water to produce hydrogen gas. Credit Chem Usage Restrictions Please credit Chem. License Licensed content 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.