Chemical activity heatmap of the Aun2+ clusters (IMAGE) Science China Press Caption The overall distribution of CO adsorption on the Aun2+ clusters (n: 16-90). Credit ©Science China Press Usage Restrictions Use with credit. License Original 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.