Understanding the physicochemical and transport properties of pyrazolium based ionic liquids bearing iodide and triiodide anions

Talip, Ruwaida Asyikin Abu; Yahya, Wan Zaireen Nisa; Bustam, Mohamad Azmi

doi:10.1016/j.molliq.2021.118270

Cited by 8 publications

(7 citation statements)

References 76 publications

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“…This is in accord with the study reported in [12] where the incorporation of nitratebased ILs into the Nafion™ membrane has resulted in a greater conductivity of the membrane compared to the usage of formate-based ILs. The variation in length of the alkyl chain attached to the imidazolium-based showed that the longer alkyl chain caused the ionic conductivity to be lower as it induced greater intermolecular attractions and impedes ion mobility as reported in [18,[23][24][25][26]. The phosphonium and boron-based ILs showed significantly lower conductivities compared to the imidazolium and ammonium-based ILs.…”

Section: Resultsmentioning

confidence: 86%

“…The data predicted served as a guideline to narrow down the overwhelming number of simple ionic liquids. Hence, it is necessary for the prediction to be followed by experimental work [15][16][17][18][19].…”

Section: Resultsmentioning

confidence: 99%

“…Apart from that, the length of the alkyl chain of the imidazolium was also varied. Based on the predicted conductivities, the variation of the anion has a greater effect on the ionic conductivity of the resulting ILs [18,23]. The combination of nitrate anion followed by trifluoromethanesulfonate with all cations has resulted in the highest conductivity compared to other anions.…”

Section: Resultsmentioning

confidence: 99%

“…The method to optimize the structure in this study is adapted from [15][16][17][18][19][20][21][22]. COSMO-RS was used to determine the σ-profile of a molecule by performing quantum chemical calculations using molecular structure and confirmation information.…”

Section: Structure Optimization Generation Of the σ-Profile Of The Ca...mentioning

confidence: 99%

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Prediction of the conductivity and compatibility of the selected ionic liquids (ILs) with Nafion™ using COSMO-RS

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Proton exchange membrane (PEM) electrolysis is one of the waters splitting techniques available for producing green hydrogen. As such, improvement of the membrane ion conductivity will result in improvement of hydrogen production. Ionic liquids have recently been reported to enhance ionic conductivity of PEM. Herein, a screening method to select suitable ionic liquids for the development of efficient proton exchange membrane. COnductor-like Screening MOdel for Realistic Solvents (COSMO-RS) was used to predict the ionic conductivity as well as the compatibility of the ions with the Nafion™ through the interpretation of σ-profile as well as interaction energy of the selected cations and anions. It was found that the anions namely of trifluoromethanesulfonate and nitrate with the cation of ammonium and imidazolium may be the best candidate for the ILs to be incorporated to Nafion™ for polymer electrolyte membrane (PEM) as the combination gives high ionic conductivity with considerable high interaction towards Nafion™. It is to be highlighted that the ionic liquids mainly interact with Nafion™ through the anion as implied by the high interaction energy of the anion towards Nafion™ compared to the cation.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Structure Optimization Generation Of the σ-Profile Of The Ca...mentioning

confidence: 99%

See 2 more Smart Citations

Prediction of the conductivity and compatibility of the selected ionic liquids (ILs) with Nafion™ using COSMO-RS

2023

Sustainable Processes and Clean Energy Transition

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“…At 328 K, [N 1888 ]I existed as paste solid, while the viscosities of [N 1888 ][I 3 ] and [N 1888 ][I 5 ] were 49.6 cP and 47.1 cP, respectively. This considerable difference in viscosity could be attributed to the increased charge delocalization of [I n ] − ( n = 3, 5) compared to I − , as well as a reduction in the electrostatic attraction between the cation and [I n ] − ( n = 3, 5) 22 . The notably low viscosity of polyiodide ILs enables rapid mass transfer without the need for diluents, which is a big benefit in industrial applications.…”

Section: Resultsmentioning

confidence: 99%

New and facile recovery strategy for silver, copper, and nickel from waste silver contacts using polyiodide ionic liquids

Yin,

Wang,

Liu

et al. 2024

AIChE Journal

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This work proposed a novel strategy for recovering Ag, Cu, and Ni from waste silver contacts (WSCs) using polyiodide ionic liquids (ILs). Our method exhibited exceptional leaching efficiency (Ag: 98.7%, Cu: 99.1%) and remarkable reusability (over 6 cycles). In contrast to a traditional three‐step leaching‐extraction‐striping process, our polyiodide ILs present a significant simplification. This approach is ideal for practical applications due to its low viscosity (49.6 cP) and gentle (55°C) leaching conditions of polyiodide ILs. Additionally, the redox leaching mechanism was successfully elucidated by XPS, XRD, and UV‐vis spectra. Based on our findings, a closed‐loop route for the recovery and separation of Ag, Cu, and Ni was suggested. Moreover, economic analysis revealed that the recovery of 1.0 kg WSCs could generate a considerable profit of 58 ± 7 USD. Overall, this new method provides a rapid, high profit, and sustainable recovery strategy with significant potential for industrial applications.

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Closed-loop process for selective leaching and recovery of palladium from spent auto-exhaust catalysts using iodotrihalide ionic liquids

Yin,

Li,

Liu

et al. 2024

Journal of Hazardous Materials

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Understanding the physicochemical and transport properties of pyrazolium based ionic liquids bearing iodide and triiodide anions

Cited by 8 publications

References 76 publications

Prediction of the conductivity and compatibility of the selected ionic liquids (ILs) with Nafion™ using COSMO-RS

Prediction of the conductivity and compatibility of the selected ionic liquids (ILs) with Nafion™ using COSMO-RS

New and facile recovery strategy for silver, copper, and nickel from waste silver contacts using polyiodide ionic liquids

Closed-loop process for selective leaching and recovery of palladium from spent auto-exhaust catalysts using iodotrihalide ionic liquids

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