Recent advances in alkoxylation chemistry of polyoxometalates: From synthetic strategies, structural overviews to functional applications

Zhang, Jiangwei; Huang, Yichao; Li, Gao; Wei, Yongge

doi:10.1016/j.ccr.2017.10.025

Cited by 235 publications

(164 citation statements)

References 163 publications

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“…[50][51][52][53] Covalently incorporating functional organic moieties in a controllable manner onto the POMs surfaces make the precursor structure versatility more accessible. [50][51][52][53] Covalently incorporating functional organic moieties in a controllable manner onto the POMs surfaces make the precursor structure versatility more accessible.…”

Section: Introductionmentioning

confidence: 99%

“…Polyoxometalates (POMs) are a special class of metal oxide anion clusters with well-defined molecular nanostructures. [50][51][52][53] Covalently incorporating functional organic moieties in a controllable manner onto the POMs surfaces make the precursor structure versatility more accessible. Our previous works have shown that the organoimido-derivatized hexamolybdates [Mo 6 O 19 ] 2− (Mo6, a typical Lindqvist-type POM) can be easily acquired by applying various N-containing arylamine ligands to replace oxo sites in Mo6 clusters, which reconcile the quantitative amount of MoN bonds.…”

Section: Introductionmentioning

confidence: 99%

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Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Huang

et al. 2018

Advanced Energy Materials

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An efficient, durable, and low‐cost hydrogen evolution reaction (HER) catalyst is an essential requirement for practical hydrogen production. Herein, an effective approach to facilitate the HER kinetics of molybdenum carbide (Mo2C) electrocatalysts is presented by tuning its electronic structure through atomic engineering of nitrogen implantation. Starting from the organoimido‐derivatized polyoxometalate nanoclusters with inherent MoN bonds, the formation of N‐implanted Mo2C (N@Mo2C) nanocrystals with perfectly adjustable amounts of N atoms is demonstrated. The optimized N@Mo2C electrocatalyst exhibits remarkable HER performance and good stability over 20 h in both acid and basic electrolytes. Further density functional theory calculations show that engineering suitable nitrogen atoms into Mo2C can regulate its electronic structure well and decrease MoH strength, leading to a great enhancement of the HER activity. It could be believed that this ligand‐controlled atomic engineering strategy might influence the overall catalyst design strategy for engineering the activation sites of nonprecious metal catalysts for energy conversions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Huang

et al. 2018

Advanced Energy Materials

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“…Polyoxometalate enjoys various advantages such as the tunable electronic properties and excellent redox activities . Their electronic properties could be easily modified via a number of well‐developed synthetic routes.…”

Section: Introductionmentioning

confidence: 99%

“…Polyoxometalate enjoys various advantages such as the tunable electronic properties and excellent redox activities. 28,29 Their electronic properties could be easily modified via a number of well-developed synthetic routes. They often consist of a metal-oxygen core and a shell of molecular ligands and alkoxide groups, where the metal could be Ti, W, Mo, Ni, V, Ta, and Au, etc.…”

Section: Introductionmentioning

confidence: 99%

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

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Summary Polyoxometalates could be viewed as the molecular counterpart of the metal oxides, which are essential ingredients for various energy conversion and storage applications. In this manuscript, we review the progress of engineering functional polyoxometalates toward energy applications, focusing on, but not limited to, polyoxotitanate, polyoxotungstate, and polyoxomolybdate. These polyoxometalates are considered to be promising candidates for dye‐sensitized solar cell, perovskite solar cell, lithium‐ion battery, lithium‐sulfur battery, supercapacitor, and water‐splitting system. We believe advanced energy devices with better performance could be derived from further engineering the polyoxometalates owing to their molecular design flexibility.

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“…In this present work, we adopt the simple one-pot synthesis route of title compound by hydrothermal technique.The Polyoxometalates (POM) are metal-oxo clusters of molybdenum, tungsten, and vanadium, etc. attracting considerable interest because of their versatility [21]. The POMs are well known for their usage in multiple fields such as medicine, electronics, magnetism, optics [22], conductance, supramolecular chemistry [23], adsorption [24], antitumor [25], anti-cancer [26], anti-bacterial [27] and catalysis etc.…”

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confidence: 99%

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

Sabarinathan¹,

Vijayakumar

Arumuganathan³

2020

SN Appl. Sci.

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One-pot synthesis of polyoxometalate (POM) based hybrid material 1 was synthesized by mixing copper nitrate, silicomolybdic acid and urea under hydrothermal condition. The reduction ability of 1 was examined by employing 2,4,6-trinitrophenol (2,4,6-TNP) and 4-nitrophenol (4-NP) in the presence of sodium borohydride in water. The catalytic reduction into the corresponding amine was monitored by UV-Visible spectroscopy. The rate and order of catalytic reduction were studied through chemical kinetics and follows pseudo-first-order. The efficiency of the catalyst was investigated by employing used catalyst 1 for at least ten cycles. Leaching experiments and performance of the reusability of catalyst were supported by FT-IR analyses. In addition, the electrochemical reduction ability of catalyst 1 was also executed by Cyclic Voltammetry (CV). Catalyst 1 was characterized by Fourier-Transform Infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), UV-Diffused Reflectance (UV DRS), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Photoelectron Spectroscopy (XPS), and Bruner-Emmet-Teller analyses (BET). Solid-state decomposition kinetics of 1 was performed from Thermogravimetric Analysis (TGA) data by fitting into model equations such as Flynn-Wall-Ozawa (FWO) and corrected (C-FWO).of steps in synthesis, reporting with a lower yield, specific and selectivity, etc. [17]. Copious reports were available with gracious metals such as Pd and Pt catalysts, however, the expensive nature of such metals restrict the common usage [18,19]. Hence, the development of a novel simple methodology for the reductive conversion with selectivity is currently required research area [20]. In this present work, we adopt the simple one-pot synthesis route of title compound by hydrothermal technique.The Polyoxometalates (POM) are metal-oxo clusters of molybdenum, tungsten, and vanadium, etc. attracting considerable interest because of their versatility [21]. The POMs are well known for their usage in multiple fields such as medicine, electronics, magnetism, optics [22], conductance, supramolecular chemistry [23], adsorption [24], antitumor [25], anti-cancer [26], anti-bacterial [27] and catalysis etc. [28]. Usage of POM cluster as a catalyst along with transition metal support in the form of matrix composite could have an added advantage over to either as bare transition metals/plain POM treatment like controlled oxidation, deactivation in air, stopping magnetically induced aggregation, etc. [29][30][31]. It is worth mentioning that in the presence of NaBH 4 the POM has been reported as an efficient reductive catalyst as the reduction concern [32]. In this present work, we report a novel inorganic-organic hybrid composite POM-hybrid (1) material isolated in situ and applied as a reductive catalyst for aromatic nitrophenol derivatives in an aqueous medium.

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Recent advances in alkoxylation chemistry of polyoxometalates: From synthetic strategies, structural overviews to functional applications

Cited by 235 publications

References 163 publications

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

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