The impacts of water are studied by adding different dosages. An interesting phenomenon is that a small amount of water inhibits conversion, while a large amount of water promotes it instead. Another experimental phenomenon is that some solids adhere to the cathode near the liquid when water is the solvent. Meanwhile, a few solids form a membrane. These solids most likely came from the polymerization of nitrobenzene when considering the insolubility of nitrobenzene in water. It is speculated that moisture in a nonaqueous solution hinders the formation of Li + /2piperidone complex for Li-ion is easier to bind with H2O via the lithium bond leading to some difficulties of reduction of nitrobenzene . However, the SEI will not form in aqueous solution according to the experiments. A distinct mechanism occurs where nitrobenzene tends to polymerize, which results in a high loss of nitrobenzene. Therefore, water plays a negative role in the reaction, but moisture in the air does not have a significant effect on the reaction.