Pd nanocube as non-enzymatic glucose sensor

• DOI: 10.1016/j.snb.2014.11.091
• Publication Date: 2014-11-21T14:31:21Z
• Authors: Jyun-Sian Ye; Chin-Wei Chen; Chien-Liang Lee
• Keywords: Linear range

Abstract Pd nanocubes enclosed by (1 0 0) planes are successfully used as stable catalysts for d -glucose sensors. In this study, a comparison of the specific activities in terms of electrochemical real surface area (ESA) between the Pd nanocubes enclosed by (1 0 0) planes and Pd nanoparticles dominated by (1 1 1) planes is performed to assess their ability to electrocatalyse glucose oxidation. By measuring activity per ESA, the nanocubes (6.3 × 10−5 C cm−2) are found to perform 1.45 times better than the nanoparticles (4.32 × 10−5 C cm−2). The higher specific activity of the nanocubes can be attributed to the higher oxidation power of the anodic glucose oxidation process catalysed by the (1 0 0) planes of the nanocubes. Furthermore, the prepared nanocubes show great potential and stability for use as a glucose sensor system as they have a sensitivity of 34 μA mM−1 cm−2 and a linear range of 1–10 mM.