Studying Cerium With Cosmic (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption At the COSMIC Microscopy beamline, researchers probed the oxidation state of the chemical element cerium using scanning transmission X-ray microscopy (STXM) under operando conditions. It was a first demonstration of this capability at COSMIC. The results confirmed how cerium particles dictated the size and locations of the reaction sites of platinum particles. In this artistic depiction, hybrid CeOX-TiO2 nanoparticles (silver spheres) are shown evenly covered with platinum and cerium pairs (yellow and blue) while conventional titanium dioxide particles are shown less densely covered with larger platinum clusters (gold). Credit Chungnam National University 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.