Lowering Interfacial Dissolved Gas Concentration for Highly Efficient Hydrazine Oxidation at Platinum by Fluorosurfactant Modulation.

Regulating the dissolved-gas concentration at the electrodesolution interface represents a promising universal strategy to achieve high efficiency towards gas evolution reactions. Here, we present a facile method to modulate the interfacial dissolved-gas concentration using cationic fluorinated pyridinium sulfonate (CFPS) for highly efficient hydrazine oxidation (HzOR). We found that the interfacial dissolved-nitrogen concentration was effectively lowered by the cationic surfactant CFPS, while CFPS still ensured a sufficient exposure of the active sites during the HzOR. As a result, relative to pure Pt, the CFPSmodulated Pt exhibited a 2.1-fold higher current density and a lower overpotential for HzOR. This work presents a new avenue to achieve highly efficient hydrazine oxidation through regulating the interfacial gas concentration. [ABSTRACT FROM AUTHOR]