Nickel Felt electrode - EM view (IMAGE) Duke University Caption An electron microscope view of the nickel felt material that optimized surface area and bubble release as it produced hydrogen from electrolysis. 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.