Effective and facile electrochemical oxidation of chemical fuels is pivotal for fuel cell applications. Herein, we report the electrocatalytic oxidation of hydrazine on a citratecapped Au-TiO2-modified glassy carbon electrode, which follows two different oxidation paths. These two pathways of hydrazine oxidation are ascribed to occur on Au and the activated TiO2 surface of the Au-TiO2 hybrid electrocatalyst. This activation was achieved through molecular capping of the Au-TiO2 surface by citrate, which leads to favorable hydrazine oxidation with a lower Tafel slope compared to that of the clean surface of the respective
materials, that is, Au and TiO2.
Ref: ACS Omega 2017, 2, 1215−1221.