Plasma-Promoted Ammonia Decomposition over Supported Ruthenium Catalysts for CO -Free H Production.

The efficient decomposition of ammonia to produce CO -free hydrogen at low temperatures has been extensively investigated as a potential method for supplying hydrogen to mobile devices based on fuel cells. In this study, we employed dielectric barrier discharge (DBD) plasma, a non-thermal plasma, to enhance the catalytic ammonia decomposition over supported Ru catalysts (Ru/Y O , Ru/La O , Ru/CeO and Ru/SiO ). The plasma-catalytic reactivity of Ru/La O was found to be superior to that of the other three catalysts.

Influence of ozone and humidity on the formation of sulfate and nitrate in airborne fine particles.

Ambient concentrations of HNO3 and SO2, and particulate NO3- and SO4(2-) were simultaneously measured in daytime and nighttime in southern Taiwan, to investigate the conversion effect of these inorganic species into airborne particulate. During the episode days, the average particulate nitrate mass of accumulation mode (0.18-1.