Fabrication of single Pt@Au nanowire electrodes for monitoring hydrogen peroxide released from living cells

作者：Liu, Yong; Zhang, Yaoyao; Hua, Hongmei; Li, Yongxin^*

来源：RSC Advances, 2017, 7(70): 44552-44558.

DOI：10.1039/c7ra08085a

• SCANNING ELECTROCHEMICAL MICROSCOPY
• REACTIVE OXYGEN
• NANOELECTRODES
• NANOPARTICLES
• ELECTROCATALYSIS
• NM

Single platinum covered Au nanowire electrodes (Pt@AuNWEs) were fabricated by a Cu under-potential deposition (UPD)/Pt redox replacement technique using a single Au nanowire as a template, and were characterized by transmission electron microscopy (TEM), electrochemical method and finite-element simulation. Electrochemical experiments showed that a steady-state current could be achieved for common redox species, such as ferrocene (Fc), ferrocenemethanol (FcCH(2)OH), K3Fe(CN)(6) and Ru(NH3)(6)Cl-3. The prepared single Pt@AuNWEs exhibited unusual electrocatalytic activity towards the reduction of H2O2, and were used to fabricate a nanosensor for the detection of H2O2 with good stability and high selectivity. The as-prepared nanosensor was applied to monitor H2O2 released from living cells stimulated by ascorbic acid with a satisfactory performance.

• 出版日期2017
• 单位安徽师范大学