A series of POM-based compounds by tuning coordination groups and spacers of ligands: electrocatalytic, capacitive and photoelectrocatalytic properties

Abstract

Seven polyoxometalate-based compounds were synthesized under hydrothermal conditions, namely [Co(H2Ptep)(HPtep)(H2O)2(PW11CoO39)]·4.5H2O (1), {[Cu(H3Ptep)2(H2Ptep)2][SiW12O40]}·(SiW12O40)2·8H2O (2), {Cu3(H2Ptpi)2(Ptpi)2(H2O)5[(PMo11CuO39)2]}·6H2O (3), [Co(H2Ptpi)2(HPtpi)2(SiMo12O40)2]·2H2O (4), [Co3(Ptpi)2(H2O)6(TeMo6O24)]·2H2O (5),[Co2Na(HPtpi)(H2O)7.5(TeMo6O24)]·3.5H2O (6), [Cu(HZtpi)(H2O)2(CrMo6(OH)6O18)]·5H2O (7) (Ptep = 1-[2-(3-Pyridin-4-yl-[1,2,4]triazol-4-yl)-ethyl]-piperazine, Ptpi = 1-[2-(3-Pyridin-4-yl-[1,2,4]triazol-4-yl)-propyl]-imidazol, Ztpi =...

Nanomaterial with Core–Shell Structure Composed of {P2W18O62} and Cobalt Homobenzotrizoate for Supercapacitors and H2O2-Sensing Applications

“…According to the figure, when {P 2 W 18 }@Co-BTC-GCE was used as the electrochemical sensor to detect H 2 O 2 , the linear equations were I(μA) = −106.806–61.114 C(mM) and R 2 = 0.995 and the detection limit was 0.633 μM (S/N = 3). The sensitivity was 8.65 mA mM −1 cm −2 and the total linear range was 1.9 μM~1.67 mM, superior to literature reports [ 76 , 77 , 78 , 79 ]. The linear range may be due to the large specific surface area and porosity of the POMOF core–shell structure, which facilitates the homogeneous dispersion of precursors and the transfer of electrons to the internal structure, thereby improving the reaction kinetics on the surface of the electrode material [ 80 ].…”

State-of-the-art advances in the syntheses, structures, and applications of polyoxometalate-based metal–organic frameworks

“…2). [40][41][42][43][44][45][46][47] These organic ligands can be subdivided into rigid, semi-rigid and flexible ligands. The long and flexible organic ligands tend to generate interpenetrating and porous structures of PMOFs.…”

A hybrid borotungstate-coated metal–organic framework with supercapacitance, photocatalytic dye degradation and H2O2 sensing properties

“…The specific capacitance at a current density of 2 A g −1 was 237.0 F g −1 , and the capacitance retention was 92.5% over 1000 cycles. In 2022, Wang 39 reported the hydrothermal synthesis of the compound [Co(H 2 Ptpi) 2 (HPtpi) 2 -(SiMo 12 O 40 ) 2 ]•2H 2 O. The highest specific capacitance was 202 F g −1 , and after 1000 cycles the capacitance retention was 85.8 %.…”