The objective of the present study is the direct conversion of potential greenhouse gases methane (CH4) and nitrous oxide (N2O) into value added products like methanol, syngas, etc. in a nonthermal plasma reactor operated under ambient conditions. Typical results indicated that co-processing of the reactants has an advantage of in-situ decomposition of N2O into N-2 and atomic oxygen that favors methane partial oxidation to methanol. In order to improve the selectivity to methanol, plasma reactor was operated by integrating CuO/CeO2, NiO/CeO2 and Cu-Ni (5-5)/CeO2 catalysts. Among the studied catalysts, Cu-Ni (5:5 wt%) supported on ceria showed the best selectivity of similar to 36% to methanol. (C) 2015 Elsevier B.V. All rights reserved.