Ruthenium (Ru) is a rare transition metal in the platinum group. It is found as a minor component in platinum ores, but it is also produced as an industrial chemical and is used in electrical contacts, thick-film resistors, and as a chemistry catalyst.
Synthesis of RuS1.7 Nanocrystallites
The synthesis of ruthenium sulfide nanoparticles is an important advance in the development of new antitumor drugs and enhanced permeability and retention (EPR) agents. The ruthenium sulfide molecule is a member of the metal-metal ternary transition metal sulfides (TMS) family. It has a band gap of 1.8 eV and can be absorbed in the NIR region, similar to MoS2 (1.7 eV)27. It has an octahedral geometry and is very stable in both solution and the solid state, making it ideal for NIR absorption29.
Electrochemical performance of ruthenium sulfides synthesized with different molar ratios and reaction times in a 0.5 M H2SO4 aqueous electrolyte was investigated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) cycling, and electrochemical impedance spectroscopy at the open circuit voltage. It was shown that a high molar ratio of ruthenium to sulfur (e.g., 1:1.7) resulted in a strong enhancement of electrochemical performance and an increase in specific capacitance.
Structure and oxidation states of RuS1.7 Nanocrystallites
The ruthenium sulfide precursor was prepared by dissolving 7 g of hexaamineruthenium(III) chloride in 150 mL of hydrochloric acid. The suspension was refluxed for 4 h and the yellow solid was obtained after filtering. The crystalline cobalt ruthenium sulfide was formed after heating the solid at 650 degC for 2 h under a N2 atmosphere.