Catalyst in a Host (IMAGE) Queen Mary University of London Caption Using thermodynamic Pourbaix diagrams, scientists can squeeze catalysts inside host materials like a ship into a bottle. Credit Jingwei Hou 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.