## 5 Conclusions  
The DRE of NO and NO\({}_{\times}\) were obviously influenced by electrode structure. Under deficient oxygen, better DRE of NO and NO\({}_{\times}\) is realized in the TM-DBD, and the electron impact dissociation mainly determined the destruction rate of NO with the conversion products of N\({}_{2}\) as well as N\({}_{2}\)O. When O\({}_{2}\) concentration increased, the DRE of NO\({}_{\times}\) decreased, whereas the DRE of NO decreased and then increased in the two DBD reactors. Under O\({}_{2}\) abundant conditions, NO was actively turned into NO\({}_{2}\) by the oxidation reaction. Higher DRE of NO and NO\({}_{\times}\) is realized in the CC-DBD reactor because new NO\({}_{\times}\) was produced by the oxidation of N generated from N\({}_{2}\) dissociation in the TM-DBD reactor.  
\begin{table}
\begin{tabular}{c c c} \hline \hline  & & e+NO\(\rightarrow\)e+NO\({}^{\bullet}\) \\  & Low O\({}_{2}\) & NO\({}^{\star}\)+NO\({}^{\star}\)\(\rightarrow\)N\({}_{2}\)O+O \\  & & NO\({}^{\star}\)+NO\({}^{\star}\)\(\rightarrow\)N\({}_{2}\)+O\({}_{2}\) \\ \hline \multirow{6}{*}{CC-DBD} & & e+NO\(\rightarrow\)e+NO\({}^{\star}\) \\  & & e+O\({}_{2}\)\(\rightarrow\)e+2O \\  & & NO\({}^{\star}\)+O\(\rightarrow\)NO\({}_{2}\) \\  & High O\({}_{2}\) & NO\({}^{\star}\)+NO\({}^{\star}\)\(\rightarrow\)N\({}_{2}\)O+O \\  & & O\({}_{2}\)\(\rightarrow\)O\({}_{3}^{\circ}\) \\  & & O\({}_{3}^{\circ}\)+M\(\rightarrow\)O\({}_{3}\) \\  & & O\({}_{3}\)+NO\(\rightarrow\)NO\({}_{2}\)+O\({}_{2}\) \\ \hline \multirow{6}{*}{TM-DBD} & \multirow{2}{*}{Low O\({}_{2}\)} & e+N\({}_{2}\)\(\rightarrow\)e+2N \\  & & e+NO\(\rightarrow\)e+N+O \\ \cline{1-1}  & & NO\(\rightarrow\)N\({}_{2}\)+O \\ \cline{1-1}  & & e+N\({}_{2}\)\(\rightarrow\)e+2N \\ \cline{1-1}  & & e+O\({}_{2}\)\(\rightarrow\)e+2O \\ \cline{1-1}  & & e+NO\(\rightarrow\)e+N+O \\ \cline{1-1}  & High O\({}_{2}\) & NO+O\(\rightarrow\)NO\({}_{2}\) \\ \cline{1-1}  & & N+O\(\rightarrow\)NO \\ \cline{1-1}  & & N+O\({}_{2}\)\(\rightarrow\)NO\({}_{2}\)+O \\ \hline \hline \end{tabular}
\end{table}
Table 2: The reactions in CC-DBD and TM-DBD under different O\({}_{2}\) concentrations.  
The simulation results showed that the electron energy distribution in the TM-DBD reactor was typical Poisson distribution differing from the CC-DBD reactor. The largest electron energy and average electron energy were 12.09 eV and 3.35 eV in the TM-DBD reactor, respectively, while they were 5.25 eV and 2.96 eV in the CC-DBD reactor, respectively.  
These experimental and simulation results verified that enough energy could initiate the reaction of N\({}_{2}\)\(\rightarrow\)2N and then produce new NOx in the presence of O\({}_{2}\) in the TM-DBD reactor. Therefore, the electrode structure of the CC-DBD reactor is preferable for better NO abatement and fewer new NOx generation in the DBD reactor under higher O\({}_{2}\) concentration condition.  
The financial support for this research was provided by National Natural Science Foundation of China (no. 21577023), the Key Project supported by the Science and Technology Commission of Shanghai Municipality (no. 15 DZ1205904), and Technology Innovation and Energy Saving Enhancement Project supported by Shanghai SASAC (no. 2013019). The authors thank [PERSON] and [PERSON] for their help in the research work.  
[PERSON] and [PERSON] designed the experiments. [PERSON] and [PERSON] performed the experiments. [PERSON] wrote the paper and analyze the data. [PERSON] contributed simulation tools. [PERSON] and [PERSON] supervise the whole work.  
The authors declare no conflict of interest.