Formation of platinum-silver nanostructure with hollow filament structure using techniques based on photographic chemistry and its electrocatalytic behavior for aldose electrooxidation

Abstract

• A novel hollow nanostructure composed of Pt and Ag (hPtAgNS) with nanofilament morphology was prepared using silver halide photographic chemistry techniques. • The electrocatalytic nature of hPtAgNS was examined. • The electrode carrying hPtAgNS exhibited an electrooxidation current at a mild electrode potential of +0.30 V vs. Ag/AgCl and physiological pH of 6.8. • The electrocatalytic current was analyzed based on a simple adsorption kinetic model. A photographically prepared silver nanofilament (pAgNF) was treated with a platinum(II) complex, giving a novel hollow filament nanostructure composed of platinum and silver (hPtAgNS). The electrocatalytic activity of hPtAgNS to the oxidation of reducing sugars was examined. The electrode carrying hPtAgNS exhibited anodic currents to glucose and galactose at a mild electrode potential of +0.30 V vs. Ag/AgCl and physiological pH of 6.8, with the linear sensitivity of 0.30–1.5 μA cm −2 mmol −1 L in the lower concentration range. The current-concentration characteristics were analyzed with a simple adsorption-based model.