Preparation and properties of highly catalytically active lignin used as electrode material from eucalyptus residue.

In this paper, highly catalytically active lignin was prepared using deep eutectic solvents. The composition and microstructure properties of the prepared lignin were characterized by FE-SEM, GPC, FT-IR, and NMR. The prepared lignin was then doped into lead powder to prepare electrodes, which were electrochemically analyzed under conditions simulating zinc electrodeposition. The findings of this investigation indicate that the voltammetric charge q∗ of the lignin-doped lead-based electrode (0.6 wt%) is 0.72 C/cm2, which is twice that of the pure lead electrode (0.35 C/cm2). Lignin contains many oxygen-containing functional groups, increasing the active sites on the surface of the lead-based electrode, improving its electrochemical performance, and simultaneously reducing the oxygen evolution potential. Additionally, the oxygen evolution potential of the lignin-doped lead-based electrode (0.6 wt%) is 64 mV lower than that of the pure lead electrode. [ABSTRACT FROM AUTHOR]