Thermal Decomposion Synthesis of Binary Ru-Sn Oxides and their Specific Capacitance

Abstract

Some binary RuO 2 -SnO 2 oxides coated on Ti were synthesed by the thermal decoposion method. A remarkable behaviour of pseudo-capacitance has been shown on the cyclic voltmmograms of the prepared samples. It is concluded that the poor specific capacitance has been found for both RuO 2 -enriched and SnO 2 -enriched binary oxides. The maximum specific capacitance occurs at the composition of 40 mol% SnO 2 and reaches the value of 1080Fg −1 when this electrode was annealed at the temperature of 260 • C. The addition of Sn into the binary oxide coating can help improve the electrode capacitancee and do no harm to the electro-catalytic properties.

The nature of phase separation in a Ru–Sn–O ternary oxide electrocatalyst

“…Addition of SnO 2 has been found to greatly increase the electroactivity and the corrosive resistance of the RuO 2 -based catalyst in acidic solutions. [1][2][3][4][5][6] In fact, Ru-Sn-O is among the highest-performance metal oxides in industrial-scale oxygen and chlorine evolutions; 7 it is also extensively studied for applications in supercapacitors, 8 electrochemical sensing, 9 lithium-ion batteries, 10 etc. Albeit the widespread research interest in Ru-Sn-O for various applications, a fundamental study of the phase stability of this ternary metal oxide system is still lacking.…”