Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor
Following our previous studies on the catalytic activity electrochemically codeposited on graphite Pd-Pt electrocatalysts for hydrogen peroxide electroreduction, a series of glassy carbon electrodes were modified with Pd or (Pd+Au) deposits aiming at the development of even more efficient electrocat...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.4061/2011/697698 |
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| author | Elena Horozova Totka Dodevska Nina Dimcheva Ruska Mussarlieva |
| author_facet | Elena Horozova Totka Dodevska Nina Dimcheva Ruska Mussarlieva |
| author_sort | Elena Horozova |
| collection | DOAJ |
| description | Following our previous studies on the catalytic activity electrochemically codeposited on graphite Pd-Pt electrocatalysts for hydrogen peroxide electroreduction, a series of glassy carbon electrodes were modified with Pd or (Pd+Au) deposits aiming at the development of even more efficient electrocatalysts for the same process. The resulting electrodes were found to be very effective at low applied potentials (−100 and −50 mV versus Ag/AgCl, 1 M KCl). The surface topography of the electrode modified with Pd+Au mixed in proportions 90% : 10%, exhibiting optimal combination of sensitivity and linear dynamic range towards hydrogen peroxide electrochemical reduction, was studied with SEM and AFM. The applicability of the same electrode as transducer in an amperometric biosensor for glucose assay was demonstrated. At an applied potential of −50 mV, the following were determined: detection limit (S/N=3) of 6×10−6 M glucose, electrode sensitivity of 0.15 μA μM−1, and strict linearity up to concentration of 3×10−4 M. |
| format | Article |
| id | doaj-art-5a0eb93fbaac4273bf1ffa787416a305 |
| institution | Kabale University |
| issn | 2090-3537 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-5a0eb93fbaac4273bf1ffa787416a3052025-08-20T03:34:31ZengWileyInternational Journal of Electrochemistry2090-35372011-01-01201110.4061/2011/697698697698Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose BiosensorElena Horozova0Totka Dodevska1Nina Dimcheva2Ruska Mussarlieva3Department of Physical Chemistry, Plovdiv University, 24 Tsar Assen Street, 4000 Plovdiv, BulgariaDepartment of Inorganic and Physical Chemistry, University of Food Technology, 26 Maritsa Boulevard, 4002 Plovdiv, BulgariaDepartment of Physical Chemistry, Plovdiv University, 24 Tsar Assen Street, 4000 Plovdiv, BulgariaDepartment of Physical Chemistry, Plovdiv University, 24 Tsar Assen Street, 4000 Plovdiv, BulgariaFollowing our previous studies on the catalytic activity electrochemically codeposited on graphite Pd-Pt electrocatalysts for hydrogen peroxide electroreduction, a series of glassy carbon electrodes were modified with Pd or (Pd+Au) deposits aiming at the development of even more efficient electrocatalysts for the same process. The resulting electrodes were found to be very effective at low applied potentials (−100 and −50 mV versus Ag/AgCl, 1 M KCl). The surface topography of the electrode modified with Pd+Au mixed in proportions 90% : 10%, exhibiting optimal combination of sensitivity and linear dynamic range towards hydrogen peroxide electrochemical reduction, was studied with SEM and AFM. The applicability of the same electrode as transducer in an amperometric biosensor for glucose assay was demonstrated. At an applied potential of −50 mV, the following were determined: detection limit (S/N=3) of 6×10−6 M glucose, electrode sensitivity of 0.15 μA μM−1, and strict linearity up to concentration of 3×10−4 M.http://dx.doi.org/10.4061/2011/697698 |
| spellingShingle | Elena Horozova Totka Dodevska Nina Dimcheva Ruska Mussarlieva Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor International Journal of Electrochemistry |
| title | Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor |
| title_full | Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor |
| title_fullStr | Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor |
| title_full_unstemmed | Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor |
| title_short | Electrocatalytic Reduction of Hydrogen Peroxide on Palladium-Gold Codeposits on Glassy Carbon: Applications to the Design of Interference-Free Glucose Biosensor |
| title_sort | electrocatalytic reduction of hydrogen peroxide on palladium gold codeposits on glassy carbon applications to the design of interference free glucose biosensor |
| url | http://dx.doi.org/10.4061/2011/697698 |
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