Catalyst Characterization (IMAGE) Lehigh University Caption Representative HAADF images and particle size distributions for the unsupported AuPd-PVP sol in the fresh (A to C) and after a CH4 oxidation reaction (D to F). Credit Graham J. Hutchings and Christopher J. Kiely 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.