期刊
MICROCHIMICA ACTA
卷 182, 期 11-12, 页码 2055-2060出版社
SPRINGER WIEN
DOI: 10.1007/s00604-015-1555-z
关键词
Anodic stripping voltammetry; Platinum nanoparticles; Palladium nanoparticles; Reduced graphene oxide; Glucose
资金
- National Nature Scientific Foundation of China [21175112, 21375112]
We describe an anodic stripping voltammetric (ASV) method for glucose sensing that widely expands the typical amperometric i-t response of glucose sensors. The electrode is based on a working electrode consisting of a glassy carbon electrode modified with Pt-Pd nanoparticles (NPs; in an atomic ratio of 3:1) on a reduced graphene oxide (rGO) support. The material was prepared via the spontaneous redox reaction between rGO, PdCl4 (2-) and PtCl4 (2-) without any additional reductant or surfactant. Unlike known Pt-based sensors, the use of Pt3Pd NPs results in an ultrasensitive ASV approach for sensing glucose even at near-neutral pH values. If operated at a working voltage as low as 0.06 V (vs. SCE), the modified electrode can detect glucose in the 2 nM to 300 mu M concentration range. The lowest detectable concentration is 2 nM which is much lower than the LODs obtained with other amperometric i-t type sensing approaches, most of which have LODs at a mu M level. The sensor is not interfered by the presence of 0.1 M of NaCl.
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