Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7920145 | Journal of Physics and Chemistry of Solids | 2018 | 38 Pages |
Abstract
ZnWO4 nanoparticles were synthesized by a hot injection method using different zinc precursors (zinc nitrate, zinc acetate, zinc sulphate and zinc chloride) with sodium tungstate. Similarly, the ZnWO4 particles were prepared by co-precipitation and solid-state method for comparative analysis. The phase formation temperature of ZnWO4 was identified through thermal analysis. X-Ray diffraction (XRD) analysis enumerates that the formation of a single-phase monoclinic wolframite structure with the space group P2/c. The characteristic functional groups of Zn-O, Zn-O-W, and W-O were identified through Fourier Transform Infrared Spectroscopy (FTIR). The microscopic images revealed that the formation of spherical shape particles in size range between 60 and 100â¯nm. The room temperature electrical conductivity was measured using LCR meter, and it shows that the conductivity is in the range of 2.2â¯Ãâ¯10â5 to 6.2â¯Ãâ¯10â6â¯S.cmâ1. The calculated corrosion rate of ZnWO4 using Tafel Polarization curve in 1â¯M H2SO4 at 1â¯mVâ¯sâ1 was 0.2554 mmpy. The electrocatalytic activity towards the hydrogen evolution reaction (HER) was studied using linear sweep voltammogram in 1â¯M H2SO4 solution at a scan rate of 1â¯mVâ¯sâ1. Further, the zinc acetate precursor assisted particles have shown a low onset potential (0.42â¯V) and higher current density (â228.52â¯mA cmâ2) in the potential range of 0 to â1.0â¯V compared with other samples.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
A. Shanmugavani, S. Gowrimeena, P. Rupa Kasturi, S. Yuvaraj, L. John Berchmans, R. Kalai Selvan,