Fig. 27. The black curve represents the current due to CO2˙− collection at the SECM substrate (an a = 12.5 μm Au UME) in DMF which contains 0.1 M TBAPF6. The tip potential was kept at Et = −2.8 V, while the substrate potential was swept from −2.1 V to −0.9 V. The tip current is represented by the red curve. Reproduced from ref. 46 with permission from the American Chemical Society © 2017.
