Electrochemical Biosensor Based on Nanoporous Au/CoO Core–Shell Material with Synergistic Catalysis. Issue 1 (6th November 2015)

• Record Type: Journal Article
• Authors: Zhang, Chao; Huang, Bin; Qian, Lihua; Yuan, Songliu; Wang, Shuai; Chen, Rong
• Is Part Of: Chemphyschem. Volume 17:Issue 1(2016)
• Page Start: 98
• Page End: 104
• Publication Date: 2015-11-06
• Subjects: atomic layer deposition -- biosensors -- cobalt monoxide -- electrochemical catalysis -- nanoporous gold; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201500854
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: An ultrathin CoO layer is deposited on the skeleton surfaces of a nanoporous gold (NPG) film by using atomic layer deposition, creating a flexible electrode. Detailed characterization demonstrates the superior performance of the flexible NPG/CoO hybrids for electrochemical catalysis. The NPG/CoO hybrid not only achieves high catalytic activity for glucose oxidation and H2 O2 reduction, but also exhibits a linear dependence of the electrical signal on the concentration of glucose and H2 O2 molecules in the electrolyte. Meanwhile, the sensitivity for H2 O2 reduction can be as high as 62.5 μA mm −1 cm −2 with linear dependence on the concentration in the range of 0.1–92.9 mm . The high sensitivity is proposed to result from the synergistic effect of Au and CoO at the interfaces, and the high conductivity of the gold skeleton with a large surface area. The superior electrochemical performance of this hybrid electrode is promising for future potential applications in various transitional‐metal‐oxide‐based electrochemical electrodes. Abstract : It's a CoO : A flexible nanoporous Au/CoO film is configured as a high‐performance electrode for electrochemical biosensing, which is evidenced by superior sensitivity for glucose detection and H2 O2 sensing.