Metal Swarf (IMAGE) University of Nottingham Caption Waste metal swarf used in experiment to transform it into a highly efficient catalyst to make hydrogen from water, a discovery that could make hydrogen production more sustainable. Credit University of Nottingham 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.