Berlin 2024 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 47: Poster DS (joint session DS/MM/O)

MM 47.11: Poster

Wednesday, March 20, 2024, 17:00–19:00, Poster B

Poly(neutral red) as a Possible Electrode Material for Electrochemical Cells — •Lisa Rohovsky¹, Daniel Holzhacker¹, Tsukasa Yoshida², and Derck Schlettwein¹ — ¹Institut für Angewandte Physik, Justus-Liebig-Universität Gießen — ²Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University

Poly(neutral red) (PNR) is used in sensors owing to its redox characteristics and high electrical conductivity. PNR is also easy to prepare and inexpensive. Therefore, it might also be of interest as an electrode material in electrochemical cells like, e.g., electrochromic cells, batteries, or dye-sensitized solar cells (DSSCs). In the latter case, it could even help to replace platinum as an electrode material, which is expensive and not readily available. In this study, thin films of PNR were prepared by an established electrosynthetic procedure by oxidation of neutral red by cyclic voltammetry (CV) in an aqueous solution.[1] Samples were produced for varied number of oxidative cycles and then analysed for their layer thickness and absorptance. As expected, the layer thickness increased linearly with the number of cycles, as did the absorptance. The reversible electrochemical reduction and reoxidation of aqueous solutions of ferro/ferricyanide in contact to the prepared films was studied as a model electrolyte. Results and implications for the applicability of such PNR electrodes will be discussed. [1]. Y. Harada, D. Kono, P. Stadler, T. Yoshida, SPAST Abstracts ,1(01), First International Conference on Technologies for Smart Green Connected Society 2021.

Keywords: electrochemistry; electrodeposition; cyclic voltammetry; modified electrode; polymer