Abstract
SnFe 2 O 4 nanocrystals (NC), prepared with a simple one-step carrier-solvent-assisted interfacial reaction process, were developed as highly efficient catalysts for hydrogen peroxide sensing. These NCs, with a size of around 7nm, served as the sensing catalyst and were decorated onto the pore surfaces of a porous fluorine-doped tin oxide (PFTO) host electrode, prepared from commercial FTO glass with a simple anodic treatment, to form the sensing electrode for hydrogen peroxide. The SnFe 2 O 4 NCs-loaded PFTO electrode exhibited an ultra-high sensitivity of 1027mAm -1 cm -2 toward hydrogen peroxide, outperforming Pt NCs-loaded PFTO electrodes. The SnFe 2 O 4 NCs-loaded PFTO electrode proved a promising relatively low cost, high performance sensing electrode for hydrogen peroxide.