Nickel felt electrode (IMAGE) Duke University Caption An example of the small, flow-through electrode that Duke researchers used to produce more hydrogen from electrolysis with a penny for scale. Credit Wiley Lab, Duke University Usage Restrictions None 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.