Synthesis and characterization of nano-ZSM-5 zeolite and its application for electrocatalytic oxidation of formaldehyde over modified carbon paste electrode with ion exchanged synthesized zeolite in alkaline media

This study reports the synthesis and characterization of template free nano sized ZSM-5 zeolite. The Synthesized ZSM-5 zeolite with an average particle size of 60 nm was synthesized using clear solution at 180 °C under autogenously pressure. The synthesized zeolite was characterized using X-ray diffraction, FT-IR and scanning electron microscopy techniques. Then it was used to prepare a new zeolite-modified carbon paste electrode (ZMCPE) based on the Ni-MFI type zeolite for formaldehyde electrocatalytic oxidation. The incorporation of Ni (ІІ) ions into the zeolite framework was done by the immersion of synthesized zeolite in a 0.5 M nickel chloride solution for 5 h. After the preparation of modified carbon paste electrode using the synthesized zeolite, the electrocatalytic oxidation of formaldehyde in alkaline solution was investigated using the cyclic voltametry method. Transfer coefficient (α = 0.51) as a kinetic parameter was calculated.

Graphical abstractX-ray difractogram of synthesized template free nano crystalline ZSM-5 zeolite, using a clear solution under autogenously conditions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis of template free nano-sized ZSM-5 zeolite was investigated. ► Characterization of synthesized zeolite was done using SEM, XRD and FT-IR techniques. ► Modified electrode was used as a novel electrode for electrocatalytic oxidation of formaldehyde. ► The transfer coefficient (α) was calculated through cyclic voltammetric technique.