نتایج جستجو برای: pulse electrodeposition
تعداد نتایج: 94286 فیلتر نتایج به سال:
Iron plays an especially important role in human physiological functions and pathological impairments. The superior properties of carbon nanotubes (CNTs) and their modification with bismuth and magnetic nanoparticles as developed in this work have led to an extraordinary and novel material to facilitate ultrasensitive detection in the nanomolar range. Here, we present the development of an elec...
To improve the contact between platinum catalyst and titanium substrate, a layer of TiO 2 nanotube arrays has been synthesized before depositing Pt nanoflowers by pulse electrodeposition. Dramatic improvements in electrocatalytic activity (3×) and stability (60×) for methanol oxidation were found, suggesting promising applications in direct methanol fuel cells. The 3× and 60× improvements persi...
In this study, Mg–2 wt% Zn scaffolds were fabricated by the powder metallurgy method, and effects of porosity content on microstructure, mechanical properties studied. Nanocomposite coatings deposited pulse electrodeposition (PED) method Mg–2Zn studied using a scanning electron microscope (SEM), X-ray diffraction (XRD), energy-dispersion spectrometer (EDS), Fourier transform infrared spectrosco...
A new approach based on pulse electrodeposition is demonstrated to be an attractive technique to replace conventional powder type membrane electrode assembly (MEA) preparation methods. The performance of the catalyst layer is optimized by controlling the pulse deposition parameters such as the peak current density, duty cycle and the total charge density. The peak current density and the pulse ...
The Ni-W/PTFE co-depositions were successfully prepared on steel via pulse electrodeposition methods. Electrodeposition was perform by dispersing 5-20 g/L PTFE particles from Ni-Watt bath. surface morphology, phase analyses crstalytallite size, distorsion and hardness of the samples characterized SEM, XRD, Vicker?s microhardness tester. friction coefficient coatings carried out using CSM microt...
A common production method for nanowires is based on electrodeposition into cylindrical channels of a nanoporous template. Since the nanostructures adopt the morphology given by the host material as they are created by reduction from an electrolyte solution, the deposition step can be considered as the most important factor that determines the structure. Pt nanostructures are of particular inte...
Enhanced performance was observed for dye-sensitized solar cells (DSSCs) utilizing counter electrodes based on Pt electrodeposits compared to counter electrodes based on sputtered Pt. Scanning electron microscopy of Pt electrodeposits revealed that the use of an initial cathodic overpotential pulse followed by steady electrodeposition at a mild cathodic potential yielded ∼40nm particles, compar...
The effect of pulse electrodeposition parameters on the composition and microstructure of Ni–Re alloys were studied on a rotating cylinder electrode. Ni–Re alloys were deposited from a citrate bath where the nickel-to-rhenium ratio was 45:1. The composition of the deposited alloy was monitored by energy dispersive spectroscopy (EDS) and compared to a single component transport-based model descr...
Copper indium diselenide thin films have been prepared onto ITO (In2O3:Sn) substrates by a newly developed pulsed electrodeposition method. The proposed scheme consists of a cyclically repeated pulsed potential sequence at the corresponding deposition potentials of elemental Cu, Se and In. When the potential is stepped back to the initial Cu electrodeposition potential after a full cycle to sta...
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