Illuminating the nature and behavior of the active center: the key for photocatalytic H₂production in Co@NH₂-MIL-125(Ti)

Abstract

Insight into the operation at the molecular level of a promising light-driven H2 production system based on Co catalytic sites hosted in a Ti-based MOF.

Heterogenisation of polyoxometalates and other metal-based complexes in metal–organic frameworks: from synthesis to characterisation and applications in catalysis

“…Illustratively, Co K-edge XANES spectra were recorded for a freshly suspended cobaloxime@NH2-MIL-125(Ti) composite sample during its in situ incubation in acetonitrile/triethylamine/water (5:1:0.1) mixture and under illumination. 217 The initial spectrum indicated the presence of Co(II) cations and clearly differed from those obtained for the pristine Co(III)-cobaloxime complex. The EXAFS data showed that the Co(II) species exhibited an octahedral first coordination sphere formed by O and/or N atoms at ~2 Å.…”

Boosting Visible‐Light‐Driven H2 Evolution of Covalent Triazine Framework from Water by Modifying Ni(II) Pyrimidine‐2‐thiolate Cocatalyst

“…Under the same conditions, the resulting 2 wt % Pt/CTF‐HC2 shows a rate of 2991 μmol g −1 h −1 for H 2 production (Figure 4b). As displayed in Table S2, 15‐[Ni(pymt) 2 ] n /CTF‐HC2 is slightly higher than that of 2 wt % Pt/CTF‐HC2 photocatalyst and is far superior to Ni(OH) 2 ‐2.5 %/TpPa‐2 (1896 μmol g −1 h −1 ), [32] Co@N 2 ‐COF (782 μmol g −1 h −1 ), [21] Co@COF‐42 (233 μmol g −1 h −1 ), [21] Co@NH 2 ‐MIL‐125 (Ti) (375 μmol g −1 h −1 ), [79] [Co II (TPA)Cl][Cl]@MIL‐125‐NH 2 (553 μmol g −1 h −1 ), [80] and the physical mixing sample of [Ni(pymt) 2 ] n and CTF‐HC2 through grinding at room temperature (1960 μmol g −1 h −1 , Figure S14).…”

MOF‐Based Hybrids for Solar Fuel Production

“…After Nasalevich's work, a few related papers postulated that the Co species in the MOF cages were responsible for accumulating the electrons needed for reducing protons to H 2 . [ 231 ] The Ni NPs have also been incorporated in MOF‐5(Zn) for effective photocatalytic H 2 production. [ 76 ] Before the photocatalytic reaction, a metal complex photosensitizer, Eosin Y (EY), was added on Ni@MOF‐5(Zn) to extend the light absorbance spectrum.…”