Intrinsic Iron‐Containing Multiwalled Carbon Nanotubes as Electro‐Fenton Catalyst for the Conversion of Benzene to Redox‐Active Surface‐Confined Quinones | Zendy

Vishnu Nandimalla | Zendy; Kumar Annamalai Senthil | Zendy

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Intrinsic Iron‐Containing Multiwalled Carbon Nanotubes as Electro‐Fenton Catalyst for the Conversion of Benzene to Redox‐Active Surface‐Confined Quinones

Author(s) -

Vishnu Nandimalla,

Kumar Annamalai Senthil

Publication year - 2016

Publication title -

chemelectrochem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 59

ISSN - 2196-0216

DOI - 10.1002/celc.201600052

Subject(s) - hydroquinone , cyclic voltammetry , catalysis , redox , fourier transform infrared spectroscopy , inorganic chemistry , carbon nanotube , raman spectroscopy , nuclear chemistry , benzene , chemistry , electrochemistry , materials science , photochemistry , chemical engineering , electrode , organic chemistry , nanotechnology , engineering , physics , optics

Multiwalled carbon nanotubes containing an iron impurity (2.1 wt %) (MWCNT‐Fe*) were used to modify a glassy carbon electrode (GCE/MWCNT‐Fe*), which was subsequently exploited for the electrochemical oxidation of benzene (BZ) to redox‐active and surface‐confined quinones (BZO) in H 2 O 2 containing pH 2 HCl–KCl. Physicochemical and electrochemical characterization methods, such as transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, UV/Vis spectroscopy, liquid chromatography coupled mass spectroscopy, and cyclic voltammetry studies with naked Fe 3+/2+ , catechol (CA), and hydroquinone (HQ), evidenced that, in the presence of H 2 O 2 , the intrinsic iron impurity in MWCNT‐Fe* follows the electro‐Fenton reaction to oxidize BZ to BZO (CA+HQ) on the surface of MWCNT‐Fe* (i.e. GCE/MWCNT‐Fe*@BZO). Electro‐catalytic oxidation of hydrazine was demonstrated as a model system for the application of the GCE/MWCNT‐Fe*@BZO catalyst.

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