Chemical bottles in lab (IMAGE) University of Texas at Austin Caption Researchers are studying chemical catalysts that can produce hydrogen gas from iron-rich rocks. Credit Toti Larson / UT Austin. Usage Restrictions Include photo credit License Original 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.