| Electrocatalytic activity of electrodeposited Ni-Mn thin films |
| Paper ID : 1149-UFGNSM-FULL |
| Authors: |
|
Niloofar Taherian1, Sohrab Sanjabi *2 1Tehran, Jalale ale ahmad, nasr bridge, Tarbiat Modares University, 14115-116 2Tarbiat Modares University |
| Abstract: |
| Electrodeposited Ni-Mn thin films alloy have been synthetized at different pH and current densities from sulfate bath. Bath compositions also were changed in order to optimize the Mn% content in the films, which rises up to 5.08 at. %. Ammonium sulfate was used as an additive in the bath for all samples. Electrochemical analysis techniques such as cyclic voltammetry (CV) and linear sweep voltammetry (LSV) have been used to realize the mechanism of reduction and deposition of the constituents. The electrochemical data showed that adding ammonium sulfate to the bath, resulted in better reduction and deposition of Mn in films. X-ray diffraction (XRD) pattern confirms FCC nickel structure. The constituents in the films were measured by energy dispersive x-ray spectroscopy (EDS). To investigate the morphology of the deposits, scanning electron microscopy (SEM) was used and the effect of different Mn% content in films, pH, and current density were compared. Linear sweep voltammetry and tofel polarization measurements have been carried out for all of the Ni-Mn films to investigate their electrocatalytic activities. In this study, significant improving effect of Mn on electrocatalytic activity of Ni was observed. Furthermore, among all of the samples, the one with optimum Mn% content in film, showed better electrocatalytic activity. |
| Keywords: |
| Ni-Mn, alloy; Thin film; Electrodeposition; Sulfate bath; Electrocatalytic activity |
| Status : Paper Accepted (Poster Presentation) |
