Based on the concept above, reducing nitrobenzene to aniline in an undivided cell with bulk electrodes becomes an attractive and promising approach. Zhang et al. realized the conversion of nitrobenzene in THF with Sm bulk electrodes and undivided cell , while its expected product is azobenzene. Peter et al. realized scalable Birch reduction with galvanized steel cathode in an undivided flow cell via the assistance of SEI learned from lithium battery technology . SEI is a solid film or membrane cover on the electrode that forms in the process of lithium battery charging and discharging . Appropriate additives can enhance the performance of the SEI and in turn, improve the performance of the battery. Meanwhile, SEI prevents the overgrowth of lithium dendrites, and it can be leveraged to decrease the excessive generation of reductive species during electrolysis. Herein, we develop a protocol to hydrogenate nitrobenzene to aniline triggered by SEI in a simple undivided cell and successfully extend it to a gram scale in practice.