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The electron transfer of redox-active sites of immobilised haemoglobin (Hb) has been studied by voltammetric experiments. The electrode surface was modified by nanoparticles (NPs) to make a suitable substrate for electric wiring of protein molecules and efficient electron transferring. Hence, the Hb/zinc oxide NPs/platinum electrode was prepared by chronoamperometric deposition of the NPs and immobilisation...
Highly roughened and catalytic macroporous Au with Pt nanoparticles (macroporous Au-/nPts) hybrid electrode was newly fabricated and characterized for compact nonenzymatic glucose biofuel cell (BFC) applications. Two disk type macroporous Au-/nPts hybrid electrodes were then sandwiched with Nafion film for fabricating a extremely miniaturized BFC device with a cathode and an anode electrodes. As expected,...
This paper proposes a high surface area of reaction and three-phase zone electrode for micro direct methanol fuel cell (μDMFC) with nano structured carbon nanotubes (CNTs) and Nafion® for the utilization of catalysts. Dense and uniform growth of CNTs on the surface of Si plate can increase the reaction area by 2 orders of magnitude than plain Si plate. Pt nanoparticles deposited on CNTs by chemical...
Colloidal suspensions of spherical crystalline Pt nanoparticles with a narrow size distribution were synthesized using a microwave synthesis process. Analogous Pt-complexes (Pt(dien)2+, Pt(trien)2+, and Pt(en)22+. where dien = diethylenetriamine, trien = triethylenetetraamine, en = ethylenediamine) were deposited onto Vulcan XC-72 carbon powder to obtain Pt/C-x catalysts (x = 3, 4, and 22 represents...
Highly roughened coral-like porous Au electrode with electroplated Pt nano-particles was newly developed and characterized. The porosity and window-pore size of the fabricated porous Au electrode were approximately 50% and 100-300 nm, respectively. The electroplated Pt nano-particle size was approximately 5-10 nm. For miniaturized electrochemical and biochemical sensor applications, the fabricated...
In this article, platinum nanoparticles with uniform diameter (about 4.3 nm) were efficiently dispersed on multi-walled carbon nanotubes (MWCNTs) with temperature controlled, microwave assisted polyol method. Temperature is an important factor that affects the reduction rate of Pt particles from chloroplatinic acid. In a microwave system, chloroplatinic acid is rapidly dissociated and reduced. Pt...
The direct electron transfer between electrodes and glucose oxidase (GOD) immobilized in a matrix containing zirconium dioxide nanoparticles (ZrO2) is described. The protein-nanoparticle assembly is stabilized by charged and uncharged compounds and the direct electron transfer is enhanced. The effects of different compositions on the electrochemical parameters, formal potential, surface loading, and...
Pt-pure Ceria (CeO2) supported by carbon black (CB) anode was synthesized for development of eco-electrode material for fuel cell application. The onset potential for methanol oxidation reaction on Pt-round shaped CeO2 shifted to a lower potential as compared with that on Pt-mixed shape (i.e. round shape + rod like shape) CeO2/CB. This onset potential on Pt-mixed shape CeO2 /CB anode at 60degC was...
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