Polynuclear Co-oxo cations in the catalytic oxidation of CO on Co-modified ZSM-5 zeolites

Шилина, М. И.; Rostovshchikova, T. N.; Николаев, С. А.; Удалова, О. В.

doi:10.1016/j.matchemphys.2018.11.005

Cited by 33 publications

(23 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…40 Satellite peak at about 786.0 eV is also a ngerprint for recognition of Co 2+ . 41,42 The Co 2p 3/2 and its satellites recorded from the catalysts were deconvoluted into ve contributions. Detailed peak deconvolution and the peak assignment were listed in Table 2.…”

Section: Structural and Morphological Propertiesmentioning

confidence: 99%

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Zheng

Zhou

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Structural and Morphological Propertiesmentioning

confidence: 99%

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Zheng

Zhou

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Oxo-metallic (clusters with bridging -O and -OH) polynuclear transition-metal compounds continue to be a hot research topic due to their stability, structural diversity, and chemical and physical properties (Schubert, 2017;Shilina et al, 2019). In particular, oxo-clusters consisting of d 10 transition-metal ions like Zn 2+ are fascinating due to their fundamental roles in biological and catalytic systems (Agura et al, 2016;Parmar et al, 2020), and their promising properties, such as luminescence, photo-electrical and semiconducting beha-viour (Wang et al, 2019(Wang et al, , 2020Yeh et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Combining valproate and bipyridyl ligands to construct a 0D core-shell Zn₅(μ₃-OH)₂ cluster and a 2D layered coordination network with a [Zn₃(μ₃-OH)]₂ SBU

Ali¹,

Darawsheh²

2020

Acta Crystallogr C

View full text Add to dashboard Cite

Starting from the proposed zinc carboxylate cluster tetrakis(μ-2-propylpentanoato)dizinc(II), Zn2(μ2-valp)4 (I), of valproic acid, a branched short-chain fatty acid, and bipyridine ligands, two new mixed-ligand coordination compounds, namely, bis(2,2′-bipyridine)di-μ3-hydroxido-hexakis(μ-2-propylpentanoato)bis(2-propylpentanoato)pentazinc(II), [Zn5(C8H15O2)8(OH)2(C10H8N2)2] (II), and poly[[bis(μ-4,4′-bipyridine)di-μ3-hydroxido-octakis(μ-2-propylpentanoato)bis(2-propylpentanoato)hexazinc(II)] dimethylformamide disolvate], {[Zn6(C8H15O2)10(OH)2(C10H8N2)2]·2C3H7NO} n (III), were synthesized. Compound II is a core-shell-type zero-dimensional discrete Zn5(μ3-OH)2 metal–organic cluster with Zn ions in double-triangle arrangements that share one Zn ion coincident with an inversion centre. The cluster contains three crystallographically non-equivalent Zn ions exhibiting three different coordination geometries (tetrahedral, square pyramidal and octahedral). The cluster cores are well separated and embedded in a protective shell of the aliphatic branched short chains of valproate. As a result, there is no specific interaction between the discrete clusters. Conversely, compound III, a 2D layered coordination network with a secondary building unit (SBU), is formed by Zn6(μ3-OH)2 clusters exhibiting a chair-like hexagonal arrangement. This SBU is formed from two Zn3(μ3-OH) trimers related by inversion symmetry and connected by two syn–anti bridging carboxylate groups. Each SBU is connected by four 4,4′-bipyridine ligands producing a 63-hcb net topology. 2D coordination layers are sandwiched within layers of dimethylformamide molecules that do not interact strongly with the network due to the hydrophobic protection provided by the valproate ligands.

show abstract

“…Promising catalysts for CO oxidation based on transition metals can be created by using zeolites as a matrix for the formation of new types of active sites . Co‐modified zeolites usually contain three main types of active Co‐sites in various proportions, depending on preparation method.…”

Section: Introductionmentioning

confidence: 99%

“…They are: (i) bare Co 2+ cations in the ion‐exchange positions of zeolites, (ii) charged metal‐ligand complexes or metal‐oxo species, and (iii) CoO and Co 3 O 4 , located at the outer surface of zeolite crystallites. The concentration, structure and location of incorporated Co species are inevitably controlled by the overall and local negative charge of the zeolite framework …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oxidation of Carbon Monoxide on Co−Ce‐Modified ZSM‐5 Zeolites: Impact of Mixed Oxo‐Species

et al. 2020

View full text Add to dashboard Cite

The main idea of the present work is the creation of new types of redox active sites by using zeolite as a matrix. Structure and catalytic activity in CO oxidation were studied for catalysts based on CoÀ Ce-modified ZSM-5 synthesized by sequential incipient wetness impregnation. Synergy of action of the two additives is observed. The most active is the catalyst with the ratio Co : Ce = 3 : 1. According to TEM, XPS, UV-vis-DRS, DRIFTS and in situ CO-reduction studies, the interaction of metals occurs in the channels of the zeolite with the formation of previously unknown joint structures in which Co III and Ce III are stabilized. Apparently, these structures are represented by mixed CoÀ Ce oxo-cations [Co x CeO y ] n + . A new absorption band at 2179 cm À 1 appearing in the DRIFT spectra of adsorbed CO is associated with mixed species. The catalytic activity in the oxidation of CO correlates with amount of these structures.[a] M.

show abstract

Polynuclear Co-oxo cations in the catalytic oxidation of CO on Co-modified ZSM-5 zeolites

Cited by 33 publications

References 64 publications

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combining valproate and bipyridyl ligands to construct a 0D core-shell Zn₅(μ₃-OH)₂ cluster and a 2D layered coordination network with a [Zn₃(μ₃-OH)]₂ SBU

Oxidation of Carbon Monoxide on Co−Ce‐Modified ZSM‐5 Zeolites: Impact of Mixed Oxo‐Species

Contact Info

Product

Resources

About

Polynuclear Co-oxo cations in the catalytic oxidation of CO on Co-modified ZSM-5 zeolites

Cited by 33 publications

References 64 publications

Combustion of lean methane over Co3O4 catalysts prepared with different cobalt precursors

Combustion of lean methane over Co3O4 catalysts prepared with different cobalt precursors

Combining valproate and bipyridyl ligands to construct a 0D core-shell Zn5(μ3-OH)2 cluster and a 2D layered coordination network with a [Zn3(μ3-OH)]2 SBU

Oxidation of Carbon Monoxide on Co−Ce‐Modified ZSM‐5 Zeolites: Impact of Mixed Oxo‐Species

Contact Info

Product

Resources

About

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combining valproate and bipyridyl ligands to construct a 0D core-shell Zn₅(μ₃-OH)₂ cluster and a 2D layered coordination network with a [Zn₃(μ₃-OH)]₂ SBU