Formation and electrochemical properties of ternary mesoporous carbon, coordination C60Pd polymer and palladium nanoparticle composites

• Published in: Electrochimica acta 2023-02, Vol.441, p.141741, Article 141741
• Main Authors: Cimoch, Izabela, Grądzka, Emilia, Bonarowska, Magdalena, Dłużewski, Piotr, Rizzi, Gian Andrea, Kozłowski, Mirosław, Winkler, Krzysztof
• Format: Article
• Language: English
• Subjects: Composites; Conducting polymers; Electrochemical capacitors; Fullerene polymers; Mesoporous materials
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2022.141741

This work describes the preparation and properties of composites based on spherical mesoporous carbon nanoparticles and fullerene-coordinated C60Pd polymer. The composite material was synthesized under a multistep chemical procedure. In the first step, mesoporous carbon nanoparticles were synthesized via a template-assisted method. Next, the C60 fullerene was incorporated into mesoporous carbon pores, and then the polymerization process was carried out in a solution containing a Pd(0) complex. The composite material is electroactive in the negative potential range due to the faradaic reduction process of C60 moieties. At less negative potentials, a high capacity current related to the presence of mesoporous carbon is observed. Under voltammetric conditions, this system exhibits a high capacitance equal to 359 F g−1 in the potential range of C60Pd reduction at 0.1 V s−1. This value is 3 times higher than that of the pure polymeric material. Moreover, the composite system is more stable than pristine C60Pd. Capacitance retention, in this case, is approximately 30% higher than that of the C60Pd polymer after 6000 charging/discharging cycles at current density of 6.7 A g−1. [Display omitted]