The electrochemical promotion of the decomposition of NO by applying an AC voltage to a YSZ cell having two Pd electrodes has been modified by calcining the Pd electrode at 1450 degrees C and then coating the obtained Pd electrode with Rh metal. The calcination of the Pd electrode at 1450 degrees C depressed the oxidation of Pd to PdO at temperatures lower than 800 degrees C. The coating of the Pd electrode with Rh increased the catalytic activity for the decomposition of NO at temperatures lower than 800 degrees C. As a result, these modifications enhanced the current efficiency for the decomposition of NO at low temperatures from 650 to 450 degrees C and at high concentrations of O-2 from 2 to 13%. No negative effect on the decomposition of NO was observed in the presence of 5% water vapor and 5% CO2, while a positive effect on this reaction was found for the presence of 500 ppm CH4, C3H8, and C5H2. Based on the measurements of the selectivity for N-2 over N2O and the decomposition of N2O, it was concluded that NO is reduced to N-2 via intermediate N2O, especially at low temperatures.