"Nanotechnology and nanomaterials"

Nickel nanomaterials electrodeposited on graphite surface
Saldan I.1,2, Lewin E.2, Dobrovetska O.3, Karlsson D.2, Bilan O.4, Kuntyi O.3

1 Department of Physical and Colloid Chemistry, Ivan Franko National University of Lviv. Kyryla and Mefodia St. 6, 79005-Lviv, Ukraine
2 Department of Chemistry, Ångström Laboratory, Uppsala University, Box 538, Uppsala 75121, Sweden
3 Institute of Chemistry, Lviv Polytechnic National University, Bandery St. 12, 79013-Lviv, Ukraine, E-mail: oksana_dobrovetska@ukr.net
4 Industrial Company “Autonomous Power Sources”, Lvivska St. 2, 80074-Velyki Mosty, Ukraine

Nickel deposition from aqueous solution of Ni-salts is very well known during last 50 years. However today new challenges of nickel preparation arises since its application is in demand for organic based systems and their size required to be in nano level. These issues promote synthesis of nickel nanomaterials in non-aqueous solutions. It is well known that preparation of nanomaterials very often influences their structure, and hence properties expected for future applications. Therefore, development and understanding of effective methods for their controlled synthesis is required. A promising approach to prepare micro- or nanostructured metallic nickel stabilized on substrates is electrochemical deposition which gives a wide range of possibilities for deposits with a certain design (thin film, particles, rods, nets etc.), geometry and even chemical composition. From the technical point of view, pulse electrolysis in aprotic organic solvents might be very convenient [1-2].
The purpose of the work is to prepare pure Ni on graphite surface using pulse electrolysis from solution of NiCl2 in dimethyl sulfoxide. Surface analysis of the deposits is made using SEM-EDX and XPS spectroscopies.

1.	Dobrovetska O, Kuntyi O, Saldan I, Korniy S, Okhremchuk Ye, Reshetnyak O. Nanostructured gold–palladium electrodeposited in dimethyl sulfoxide solutions // Mater. Lett. - 2015. -158. -P. 317-321.
2.	Fratini E, Girella A, Saldan I, Milanese C, Dobrovetska O, Sus L, Okhremchuk Ye, Kuntyi O, Reshetnyak O. Nucleation and growth of Au and Au–Pd nanoparticles at the beginning of electrochemical deposition // Mater. Lett. - 2015. -161. -P.263-266.