Although ethyl acetate well dissolves LiBr, no effective current was detected. Inspired by Li's work about ammonia electrosynthesis , other ethers, with the same functional group as THF, are tested (Supplementary information, Table S 6, Entry 2-6). Diethylene glycol dimethyl ether (DME) and 1,2-Dimethoxyethane (DE) show good electrical resistivity but poor performance. Surprisingly, 2-Methyltetrahydrofuran (2-MeTHF) has a similar structure to THF while no current was detected which shows completely different electrochemical properties. Formamides (Supplementary information, Table S 6, Entry 7-9) possess low internal resistance while gelatinous substances form under bias probably for their unpaired potential windows which leads to an interruption of electrolysis. The screening of hydrogen donors starts among amides (Supplementary information, Table S 7, Entry 1-5). Uera and N, N'-trimethyleneurea (DMPU) have solubility issues in THF, while others can all give the target product. To extend the hydrogen donor scope, some classic hydrogen sources are tried (Supplementary information, Table S 7, Entry 6-11), but aniline is not the main product. When working with the experiment data, it is found that the converted nitrobenzene concentration is lost to some extent. It is speculated that complex components are generated in an alkaline environment that cannot be detected by GC. Based on this, some sample acidic hydrogen donors were tried (Supplementary information, Table S 7, Entry 13-18). Oxalic acid seems to suppress depletion while the quantity of solid deposits on the anode may cause some problems. The yield of aniline is up to 75.48% with 6 equivalents 2piperidone but surprisingly drops when increasing the quantity of hydrogen donors.