Electrocatalytic Synergy on Nanoparticulate Films Prepared from Oppositely Charged Pt and Au Nanoparticles

Abstract

Electrodes modified with oppositely charged platinum and gold nanoparticles exhibit electrocatalytic synergy of glucose oxidation. Such a simple method of preparation of bimetallic nanoparticulate films produces an electrode with significant shift of the onset potential as compared to electrodes prepared only from platinum (ca. 0.45 V) or gold (ca. 0.6 V) nanoparticles. The observed effect results from close proximity of the Au and Pt nanoparticles surfaces within the film. The electrode was also characterized by scanning electron microscopy, X‐ray photoelectron spectroscopy, powder X‐ray diffraction measurements and cyclic voltammetry.

Noble Metal Nanoparticles in Pectin Matrix. Preparation, Film Formation, Property Analysis, and Application in Electrocatalysis

“…To further identify the metallic nanocomponents of hybrid materials and their electrochemical reactivity, cyclic voltammetry (CV) was run with electrodes modified with MeNPs/pectin film in an aqueous electrolyte solution. Characteristic patterns of Pt and Ag electrodes (Figure ) − are visible, indicating that nanoparticles form percolation paths within the pectin film. At high potentials, CV of PtNPs/pectin-modified electrodes exhibits signals characteristic of the formation and reduction of metal oxide(s) (Figure a).…”

Decoration of MoS2 Nanopetal Stacks with Positively Charged Gold Nanoparticles for Synergistic Electrocatalytic Oxidation of Biologically Relevant Compounds

“…However, one of the component of the system studied here is not a noble metal [53]. The smaller magnitude of the current density of the electrode modified with MoS2/AuC11NPs (Fig.…”

One pot synthesis of poly(5-hydroxyl-1,4-naphthoquinone) stabilized gold nanoparticles using the monomer as the reducing agent for nonenzymatic electrochemical detection of glucose

“…The state of the art nanotechnology has opened up new opportunities for materials scientists and electrochemists to acquire novel materials which could be employed to replace biocatalysts for electrooxidation of glucose. Particles of gold (Au) and platinum (Pt) metals and alloys have proven attractive for their ability to oxidize glucose with excellent activity [9,[11][12][13][14][15]. Interestingly, as the size of the particles goes down the hierarchy, macro to nano, the NPs exhibit more advantageous properties due to the increased percentage of the surface atoms and quantum size effects [16,17].…”