A novel sandwich polyoxometalate (POM) Na12[WCo3(H2O)2(CoW9O34)2] and poly(vinylimidazolium) cation [PVIM+] in combination with nitrogen-doped carbon nanotubes (NCNTs) was developed for a highly selective and ultrasensitive detection of dopamine. Conductively efficient heterogenization of Co5POM catalyst by PVIM over NCNTs provides the synergy between PVIM–POM catalyst and NCNTs as a conductive support which enhances the electron transport at the electrode/electrolyte interface and eliminates the interference of ascorbic acid (AA) at physiological pH (7.4). The novel PVIM–Co5POM/NCNT composite demonstrates a superior selectivity and sensitivity with a lowest detection limit of 500 pM (0.0005 μM) and a wide linear detection range of 0.0005–600 μM even in the presence of higher concentration of AA (500 μM).

Hydrogen is an efficient green energy source due to its high energy density and environmental friendliness. Water electrolyzer which involve hydrogen generation at the cathode and O2 production at the...

An electrochemical biosensor based on Polymelamine formaldehyde (PMF) supported over oxygen functionalised carbon nanotubes (OCNT) was designed for selective and sensitive determination of capsaicin. The synergy between highly porous PMF...

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