Abstract
RuO2 -coated sintered nickel electrodes were developed by thermal decomposition of RuCl on sintered nickel pellet. The surface and compositional features of the developed sintered nickel electrodes were optimized based on their performance. The sensing behavior of the electrodes was studied in 0.4 M NaOH containing ethanol solution using cyclic voltammetry and chronoamperometry. The maximum rate of ethanol oxidation was observed at its sensing potential. The modified electrodes exhibited good linear response of ethanol concentration from 100 to 500 ppm. The response time of the sensor was 6 sec, and the sensitivity of the sensor was 1.26 mA/ppm cm2. The RuO2 -coating on the large surface area sintered nickel electrode further enhanced the large electrochemically active surface area causing high performance of the electrode.
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