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Non‐Enzymatic Amperometric Detection of H 2 O 2 on One‐Step Electrochemical Fabricated Cu 2 O/Electrochemically Reduced Graphene Oxide Nanocomposite
Author(s) -
Doğan Hülya Ö.,
Çepni Emir,
Urhan Bingül K.,
Eryiğit Mesut
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901588
Subject(s) - graphene , nanocomposite , materials science , electrode , amperometry , electrochemistry , oxide , detection limit , copper , nanotechnology , analytical chemistry (journal) , chemical engineering , inorganic chemistry , chemistry , metallurgy , organic chemistry , chromatography , engineering
In this study, we present a new approach to electrochemical growth of Cu 2 O/electrochemically reduced graphene oxide (Cu 2 O/ERGO) nanostructures that are based on simultaneous co‐reduction of both copper ions and graphene oxide from an aqueous suspension on gold electrode. The X‐ray diffraction (XRD) spectra of as‐prepared Cu 2 O/ERGO electrode showed that Cu 2 O and graphene structures in composite nanostructures. The SEM image exhibited that combining the crumpled ERGO and nanocubes shapes of Cu 2 O in nanocomposite stucture. The Cu 2 O/ERGO nanocomposite electrode exhibits good electrocatalytic activity toward detection of non‐enzymatic H 2 O 2 , compared to bare Au and Au/Cu 2 O electrodes, in terms of low working potential and high current density. The linear detection range for H 2 O 2 is 1–1000 μM while the detection limit is 0.14 μM. Furthermore, a very high sensitivity is achieved with 168.2 mA mM −1 cm −2 estimated for H 2 O 2 . These results suggest that Cu 2 O/ERGO nanocomposites thus easily prepared through an electrochemical co‐reduction method are promising electrode materials for biosensor application.