Catalyst Surface (IMAGE) Max Planck Institute for Polymer Research Caption At rough areas of a catalyst surface, water is split into hydrogen and oxygen in a more energy efficient way than at smooth areas. Credit MPI-P, License CC-BY-SA 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.