Mercury(II)-complex with 5-methyl-1,3,4-thiadiazole-2-thiol: kinetic studies of hydrogen storage

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A silver complex was prepared with benzisothiazolinone ligand, which was used to prepare new phosphorus‐rich complexes with dppe and dppp. All complexes were diagnosed by FTIR, 1H‐NMR, 31P‐NMR, CHN, and molar conductivity. The results proved that phosphines were labile, therefore 31P‐NMR was measured by cryoprotection at different temperatures. As a promoted effort to obtain direct experimental proof for the dimeric and the labile nature of [Ag(bit)(diphos)]2 complexes in solution, the 31P{1H}‐NMR spectrum of mixed (dppe/dppp) ligand complexes was measured. It was anticipated that an exchange of phosphines occurred between [Ag(bit)(dppe)]2 and [Ag(bit)(dppp)]2 complexes. However, a distribution of the dppp and dppe should result, and complex with compositions of [Ag2(bit)2(dppe)(dppp)] will be formed. The phosphine‐containing complexes were used in hydrogen storage study. The results proved that hydrogen storage values were initially similar for [Ag(bit)(dppp)]2 and [Ag(bit)(dppe)]2, but increased significantly for [Ag(bit)(dppe)]2 at higher pressures to reach 4.35 wt% at 90 bar.

Section: Introductionmentioning

confidence: 99%

Labile silver(I) complexes with benzisothiazolinone anion and phosphines: Synthesis, characterization and hydrogen storage application

Alheety,

Aljibori,

Nuaman

et al. 2024

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“…Among these are carbon nanomaterials such as graphene oxide, reduced graphene oxide, graphene, and carbon nanotubes, which have been widely studied due to their high surface area and strong adsorption properties 16‐18 . Additionally, metal‐organic frameworks, small porous polymers, polymeric nanocomposites, and certain classes of inorganic complexes have also been explored 19‐34 …”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18] Additionally, metal-organic frameworks, small porous polymers, polymeric nanocomposites, and certain classes of inorganic complexes have also been explored. [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Graphene oxide, in particular, has garnered significant attention in recent years due to its unique properties, such as its large surface area and high mechanical strength. It has been shown to be an effective material for hydrogen storage with high capacity and good reversibility.…”

Section: Introductionmentioning

confidence: 99%

Enhanced hydrogen storage capacity of graphene oxide through doping with copper ferrite nanoparticles

Hammoodi,

Mohammed,

Majeed

et al. 2024

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The aim of this study was to prepare and characterize nanocomposites consisting of graphene oxide (GO) and copper ferrite (CuFe2O4) in different doping ratios (1%‐5%) and investigate their potential for storing hydrogen gas. The prepared nanocomposites were characterized using FTIR, XRD, SEM, and TEM. The results showed that hydrogen storage at 20°C was not possible with GO alone, but the incorporation of different proportions of copper ferrite nanoparticles significantly improved the hydrogen storage properties of the composite materials. The optimal percentage of copper ferrite was found to be around 3%, and it was observed that the percentage of ferrite added is crucial in determining the hydrogen storage properties of the nanocomposites. The best hydrogen storage value of 3.3% was achieved at a temperature of 20°C and a pressure of 80 bar within just 60 seconds. The adsorption of the composite material was found to be of the second type, with a re‐creation coefficient greater than 0.97 for all the materials tested, indicating favorable adsorption. The b value was up to 0, further confirming the favorable adsorption. Overall, the results demonstrate that the incorporation of copper ferrite nanoparticles can significantly improve the hydrogen storage properties of graphene oxide, and careful selection of the doping ratio is necessary to achieve the optimal performance. These findings have potential implications for the development of efficient hydrogen storage materials for clean energy applications.

“…Hydrogen is a versatile and clean energy carrier with enormous potential for a sustainable future. It addresses challenges posed by intermittent renewable energy sources by serving as a means of energy storage 21‐25 . Excess energy generated during periods of high renewable energy availability can be used to produce hydrogen through processes like electrolysis.…”

Section: Introductionmentioning

confidence: 99%

“…It addresses challenges posed by intermittent renewable energy sources by serving as a means of energy storage. [21][22][23][24][25] Excess energy generated during periods of high renewable energy availability can be used to produce hydrogen through processes like electrolysis. This stored hydrogen can then be used during low renewable energy supply periods, ensuring a consistent energy source.…”

mentioning

confidence: 99%

Exploration of novel phenyl mercury tetrazole‐thione complexes: Characterization and investigating the impact of diamine ligands on enhanced hydrogen storage

Hameed,

Al‐Janabi,

Al‐Jibori

et al. 2024

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Ten mixed‐ligand phenyl mercury(II) complexes containing 1‐methyl‐1H‐tetrazole‐5‐thiol (HmtzS) (1) and phosphine or amine ligands. These complexes fall into two groups: [PhHg(mtzS){Ph2P(CH2)PPh2}]2 (2) and [PhHg(mtzS){Ph2P(CH2)nPPh2}] (3‐6), where n varies, and [PhHg(mtzS)(diamine)] (8‐10), with diamine choices being 2,2′‐bipyridyl (Bipy, 8), 1,10‐phenathroline (Phen, 9), or ethylenediamine (en, 10). These complexes were synthesized with moderate to high yields and characterized using various techniques. Characterization data revealed that the mtzS− ligand coordinates as a monodentate ligand through the thiolate sulfur atom in all complexes, adopting a tetrahedral geometry around the Hg(II) center. Furthermore, complexes [PhHg(mtzS)] (1) and its diamine derivatives (8‐10) were assessed for hydrogen storage at 77 K using the VTI method. Results demonstrated that the incorporation of diamines improves hydrogen storage capacity at low pressure. The precursor stored (1) 2.3 wt.% at 80 bar, while the other complexes showed storage capacities ranging from 2.9 to 3.86 wt.% at pressures of 45‐60 bar. Thermodynamic properties of the [PhHg(mtzS)(Bipy)] complex was calculated at three different temperatures. The results prove that the entropy was equal to 0.50543599 J/mol H2. K while the enthalpy equal to 0.0942638 KJ/(mol H2).