A Structurally Precise Ag(I) Complex Bulk-Modified Carbon Paste Electrode for Effective H2O2-Sensing

A bulk-modified carbon paste electrode (Ag-CPE) containing a new structurally precise Ag(I) complex, [Ag2(H2bbimb)2](pts)2 (H2bbimb = 1,3-Bis(2-benzimidazolyl)benzene, pts = p-toluenesulfonate), has been constructed and its hydrogen peroxide sensing performance was researched. The crystal structure analysis reveals that the Ag(I) complex is a dual-core cluster. The H2O2-sensing ability of Ag-CPE was studied by cyclic voltammetry and chronoamperometry method. Ag-CPE was found to lead to a linear response from 0.5 μM to 4.0 mM with a detection limit of 0.45 μM, and has been verified to have excellent stability and good anti-interference ability. The results indicate that Ag-CPE is an efficient H2O2 sensor.Graphical abstract