ZB 06 - Nanoelectrochemistry (W.Nogala)

Hydrogen peroxide generation catalyzed by battery waste material

Author(s): Magdalena Warczak and Magdalena Osial and Weronika Urbanska and Marcin Pisarek and Wojciech Nogala and Marcin Opallo
Title: Hydrogen peroxide generation catalyzed by battery waste material
Abstract: Lithium-ion battery (LiB) waste powder is a valuable source of various materials, including carbon and metals. Although this material exhibits electrical conductivity, nanostructured morphology, and may contain metal oxides, it has not been used as an electrocatalyst. Here, we demonstrated the application of LiB waste powder as a catalyst for electrochemical H2O2 generation. The powder was both immobilized on a glassy carbon (GC) electrode and assembled at a liquid–liquid interface formed by decamethylferrocene (DMFc) solution in trifluorotoluene and aqueous perchloric acid in the presence of oxygen. The electrochemistry was studied by cyclic voltammetry and also with a rotating disk electrode (RDE), and a 2-electron ORR pathway was confirmed. H2O2 generation at the liquid–liquid interface and oxidation of DMFc were detected by colorimetry, UV–vis spectroscopy and scanning electrochemical microscopy (SECM). The use of LiB waste powder reduces the ORR onset potential by ca. 0.3 V compared to an unmodified GC. When assembled at a liquid–liquid interface the waste powder increases the efficiency of H2O2 generation by ca. 20 times.
Pages: 107239
Journal: Electrochemistry Communications
Volume: 136
Year: 2022
URL: https://www.sciencedirect.com/science/article/pii/S1388248122000418
DOI: https://doi.org/10.1016/j.elecom.2022.107239