Electrocatalytic activity of [Ru(bpy)3]2+ for hypoxanthine oxidation studied by rotating electrode methods.
A rotating ring-disk electrode method for studying the electrochemical oxidation of hypoxanthine (Hx) catalyzed by [Ru(bpy)(3)](3+/2+) reaction has been developed. A limiting current plateau for [Ru(bpy)(3)](3+/2+) reaction is exhibited on the rotating disk or ring electrode. It is found that [Ru(bpy)(3)](2+) has excellent electrocatalytic activities for Hx oxidation. The electrocatalytic currents increase linearly with the rise of Hx concentrations in the range from 0.2 to 1.2 mmol/L on the immobile Pt electrode. Whereas, high rotation rate or Hx concentration makes the voltammetric curves on the rotating disk electrode display the sharp peaks instead of the limiting current plateaus. The oxidized mechanisms of Hx catalyzed by Ru(bpy)(3)(3+/2+) reaction are discussed in detail.
Yan
Xiaoxia
X
Key Lab of Electrochemical Technology on Energy Storage and Power Generation in Guangdong Universities, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China.
Li
Hong
H
Xu
Zhenghe
Z
Li
Weishan
W
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives*; D002384:Catalysis; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D019271:Hypoxanthine / Q000737:chemistry*; D009942:Organometallic Compounds; D010084:Oxidation-Reduction; D012428:Ruthenium
D009942:Organometallic Compounds; C469719:ruthenium (bpy)3(2+)-C2O4(2-); D019271:Hypoxanthine; D015082:2,2'-Dipyridyl; D012428:Ruthenium