1. ACS Applied Materials & Interfaces / Mechanically Interlocked Carbon Nanotubes as a Stable Electrocatalytic Platform for Oxygen Reduction
- Author
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Whang, Dong Ryeol, Wieland, Dominik, Vera-Hidalgo, Mariano, Seelajaroen, Hathaichanok, Sariciftci, Niyazi Serdar, and Pérez, Emilio
- Subjects
immobilization ,electrocatalysis ,rotaxane ,non-covalent architecture ,hydrogen peroxide production ,oxygen reduction - Abstract
Mechanically interlocking redox-active anthraquinone onto single-walled carbon nanotubes (AQ-MINT) gives a new and advanced example of a noncovalent architecture for an electrochemical platform. Electrochemical studies of AQ-MINT as an electrode reveal enhanced electrochemical stability in both aqueous and organic solvents compared to physisorbed AQ-based electrodes. While maintaining the electrochemical properties of the parent anthraquinone molecules, we observe a stable oxygen reduction reaction to hydrogen peroxide (H2O2). Using such AQ-MINT electrodes, 7 and 2 μmol of H2O2 are produced over 8 h under basic and neutral conditions, while the control system of SWCNTs produces 2.2 and 0.5 μmol, respectively. These results reveal the potential of this rotaxane-type immobilization approach for heterogenized electrocatalysis. Fonds zur Förderung der Wissenschaftlichen Forschung Z222-N19 Version of record
- Published
- 2020