1. Introduction to single-atom catalysts 2. Synthesis techniques for single-atom catalysts 3. Characterization techniques for single-atom catalysts 4. Single-atom catalysts for electrocatalytic oxygen reduction 5. Single-atom catalysts for electrocatalytic oxygen evolution reaction 6. Single atom catalysts for electrocatalytic hydrogen evolution reaction 7. Single-atom catalysts for electrocatalytic carbon dioxide reduction 8. In situ/operando X-ray absorption spectroscopy in small molecule-based electrocatalysis 9. Single-atom catalyst for Li-S batteries 10. Conclusion and outlooks
