Sensitive nonenzymatic detection of hydrogen peroxide at nitrogen-doped graphene supported-CoFe nanoparticles
Mehboob Hassan1, Yue Jiang1, Xiangjie Bo1
1Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Key Laboratory of Polyoxometalate Science of Ministry of Education, National & Local United Engineering Laboratory for Power Batteries, Department of Chemistry, Northeast Normal University, Changchun, Jilin Province 130024, P.R. China.
Abstract:
In this work, a new enzymeless sensor for hydrogen peroxide (H2O2) was constructed by supporting CoFe nanoparticles on the nitrogen-doped graphene (CoFe/NGR). In this preparation, the graphene oxide (GO) is first used as substrate for the growth of CoFe layered double hydroxides (CoFe LDHs) through hydrothermal reaction. Then, the pyrolysis of CoFe LDHs/GO under NH3 produces CoFe/NGR. By supporting CoFe nanoparticles on NGR support, the electrocatalytic performance of CoFe is dramatically improved because of high electric conductivity of NGR. Consequently, the combination of CoFe and NGR allows the nonenzymatic detection of H2O2. Compared with the unsupported CoFe nanoparticles, the CoFe/NGR displays high electrocatalytic activity towards H2O2, enabling a high sensitivity of 435.7 μA mM-1 cm-2 and low detection limit of 0.28 μM towards the reduction of H2O2. Especially, the attractive feature of low cost and outstanding analytical performance of CoFe/NGR suggest it great potential in electrochemical sensor and biosensor fabrication.
Related Concept Videos
The Nitrogen Cycle
Hydrogen Bonds
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
Self-Help Support Groups
Accessibility and Cost-Effectiveness
One of the primary strengths of self-help...
Inorganic Nitrogen Assimilation


