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Nonenzymatic electrochemical glucose sensor based on novel Pt–Pd nanoflakes
- Source :
-
Talanta . Sep2012, Vol. 99, p1062-1067. 6p. - Publication Year :
- 2012
-
Abstract
- Abstract: The sluggish kinetic-controlled glucose oxidation reaction on Pt electrodes is well recognized as the most critical issue that blocks the development and commercialization of enzyme-free glucose sensors, and increasing attention is being focused on improving the analytical performances of these nonenzymatic sensors through exploring new Pt-based catalysts. In the present research, we synthesized novel Pt–Pd nanoflakes (Pt–Pd NFs) with three-dimensional architectures on a homemade screen-printed gold film electrode (SPGFE) substrate using a facile electrochemical deposition without any template, and further investigated the properties of the as-fabricated Pt–Pd NFs/SPGFE for enzymeless glucose detection. The results reveal that the proposed Pt–Pd nanostructure can provide preeminent electrocatalytic activity and excellent selectivity for enzyme-free glucose sensing under simulative physiological conditions, mainly attributing to its attractive structure, large active surface and appropriate applied potential. The resulting Pt–Pd NFs/SPGFE offers linear current responses for glucose with the concentration upper limit to 16mM. The obtained sensitivity is calculated to be as high as 48.0μAcm−2 mM−1 in the presence of 0.15M chlorides ions, and practical applications for blood sample analysis are also demonstrated. The proposed Pt–Pd structure is considered as a great potential building block for the fabrication of nonenzymatic electrochemical glucose sensors. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 99
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 79872068
- Full Text :
- https://doi.org/10.1016/j.talanta.2012.07.039