Single Atom catalysts are being reported by various teams, ex: Botao Qiao’s work on single platinum atoms on FeOx which was published on Nature chemistry (DOI: 10.1038/NCHEM.1095). Generally, single atom catalysts has exceptional properties such as drastic cost-reduction, notable catalytic activity, and selectivity. This is a developing area of catalysts industry which still have challenges of sample preparation, characterization, evaluation, and also mechanistic interpretation. I would like to have your opinions and even experiences if you have relevant to synthesis, characterization and application of single atom catalysts.