Catalyst (IMAGE) Arizona State University Caption Cover of ACS Applied Energy Materials depicting a catalyst-modified solar cell producing hydrogen fuel under varying lighting conditions. Credit Graphic by Jason Drees for the cover of ACS Applied Energy Materials 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.