Citrate-Capped Hybrid Au-TiO₂ Nanomaterial for Facile and Enhanced Electrochemical Hydrazine Oxidation

摘要

Effective and facile electrochemical oxidation of chemical fuels is pivotal for fuel cell applications. Herein, we report the electrocatalytic oxidation of hydrazine on a citrate-capped Au-TiO_(2)-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 TiO_(2) surface of the Au-TiO_(2) hybrid electrocatalyst. This activation was achieved through molecular capping of the Au-TiO_(2) 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 TiO_(2).