Publications Repository - Gdańsk University of Technology

An extraordinary charge transfer kinetics and chemical stability make a boron-doped diamond (BDD) a prom- ising material for electrochemical applications including wastewater treatment. Yet, with flat geometrical sur- faces its scaling options are limited. In this study, the reticulated Vitreous Carbon (RVC) served as a substrate for boron-doped diamondized nanocarbons (BDNC) film growth resulting with complex heterogeneity carbon structures with different morphologies defined by using electron microscopy, microtomography, activation en- ergy studies, and Raman spectroscopy. The proposed modification significantly boosted the electrochemical Fe(CN)6 3 /4 redox activity. The vol- tammetry and impedimetric studies revealed its origin as a significantly higher share of electrochemically active sites at the BDNC@RVC electrode (increased by 114 %) combined with enhanced heterogeneous rate constant (2× increase up to 8.24⋅10 4 cm s 1). Finally, to establish its applicability for water treatment, the BDNC@RVC was studied as the anode in electrochemical paracetamol decomposition. Boron-enriched nanoarchitecture formed at the RVC electrode surface substantially reduced the oxidation energy barrier manifested as a decrease in activation overpotential by 212 mV, which gave a consequence in a 78 % removal rate (in 4 h, at 0.7 mA cm 2), 12 % higher than bare RVC and yielding lower amounts of APAP decomposition intermediates.

Authors

• Iwona Kaczmarzyk link open in new tab ,
• Mariusz Banasiak link open in new tab ,
• dr inż. Paweł Jakóbczyk link open in new tab ,
• dr hab. inż. Michał Sobaszek link open in new tab ,
• dr inż. Gabriel Strugała link open in new tab ,
• dr inż. Tomasz Seramak link open in new tab ,
• Dr Paweł Rostkowski,
• dr hab. inż. Jakub Karczewski link open in new tab ,
• dr hab. inż. Mirosław Sawczak,
• dr hab. inż. Jacek Ryl link open in new tab ,
• dr hab. inż. Robert Bogdanowicz link open in new tab