Renewable PMo12-Based Inorganic-Organic Hybrid Material Bulk-Modified Carbon Paste Electrode: Preparation, Electrochemistry and Electrocatalysis

PMo12-based inorganic-organic hybrid material (C21H38N)3PMo12O40⋅H2O was designed, synthesized and first used as a bulk-modifier to fabricate a renewable three-dimensional chemically modified carbon paste electrode (CPE) by direct mixing. Electrochemical method was used to characterize the modified CPE. The hybrid material bulk-modified CPE (HM-CPE) not only displays good electrocatalytic activity toward the reduction of nitrite, bromate and hydrogen peroxide, but also exhibits a remarkable advantage of renewability in the event of surface fouling, as well as simple preparation and inexpensive material. Another remarkable advantage of the HM-CPE is its excellent stability due to insolubility of the inorganic-organic hybrid material, the affinity of the C21H38N+ toward the paste and the adsorption of PMo12 on graphite, which is important for practical application.