Hydrogen bonding effect on Raman modes of Formic acid-water binary solutions

Dou, Zhenguo; Wang, Lijun; Hu, Junying; Fang, Wen‐Hui; Sun, Chia‐Chung; Men, Zhiwei

doi:10.1016/j.molliq.2020.113595

Cited by 19 publications

(5 citation statements)

References 35 publications

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“…As shown in Fig. S11, the wide peak at 3000 ~ 3700 cm −1 is attribute to O-H stretching vibration, which is constituted with three type HBs [31]. Similarly, the strong and medium HBs peaks have blue shift, and weak HBs shifts to low wavenumber with the increasing concentration, and the HBs ratio of H 2 O-H 2 O has obvious decrease (Fig.…”

Section: Synergistic Effect Of Mg 2+ and Clo 4 −mentioning

confidence: 88%

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

et al. 2021

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Although aqueous zinc-ion batteries have gained great development due to their many merits, the frozen aqueous electrolyte hinders their practical application at low temperature conditions. Here, the synergistic effect of cation and anion to break the hydrogen-bonds network of original water molecules is demonstrated by multi-perspective characterization. Then, an aqueous-salt hydrates deep eutectic solvent of 3.5 M Mg(ClO4)2 + 1 M Zn(ClO4)2 is proposed and displays an ultralow freezing point of − 121 °C. A high ionic conductivity of 1.41 mS cm−1 and low viscosity of 22.9 mPa s at − 70 °C imply a fast ions transport behavior of this electrolyte. With the benefits of the low-temperature electrolyte, the fabricated Zn||Pyrene-4,5,9,10-tetraone (PTO) and Zn||Phenazine (PNZ) batteries exhibit satisfactory low-temperature performance. For example, Zn||PTO battery shows a high discharge capacity of 101.5 mAh g−1 at 0.5 C (200 mA g−1) and 71 mAh g−1 at 3 C (1.2 A g−1) when the temperature drops to − 70 °C. This work provides an unique view to design anti-freezing aqueous electrolyte."Image missing"

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Section: Synergistic Effect Of Mg 2+ and Clo 4 −mentioning

confidence: 88%

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

et al. 2021

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“…This result implied that formic acid was mainly adsorbed through electrostatic interactions and only a small amount was adsorbed through other interactions. Because formic acid is highly hydrophilic, a large amount might adsorb via hydrogen bonds . By contrast, propanoic acid was adsorbed at less than the theoretical net Cl – release, with a stoichiometric ratio of 0.76.…”

Section: Resultsmentioning

confidence: 96%

“…Because formic acid is highly hydrophilic, a large amount might adsorb via hydrogen bonds. 37 By contrast, propanoic acid was adsorbed at less than the theoretical net Cl − release, with a stoichiometric ratio of 0.76. The Cl − release experiment was conducted in a propanoic acid solution without other matrices.…”

Section: Adsorption Affinitymentioning

confidence: 99%

Adsorption of Low-Molecular-Weight Carboxylic Acids to Anion Exchange Resins with Various Properties and the Mechanisms of Interaction

Cai

Ouyang

et al. 2022

ACS EST Water

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Anion exchange resin (AER) is often used to produce ultrapure water by removing low-molecular-weight (LMW) carboxylic acids (CAs). However, the adsorption performance of resins requires improvement, and the adsorption mechanisms are not fully clear. In this study, eight AERs with different polymer matrices, porosity types, and ammonium group properties were used to investigate the adsorption of common LMW CAs. The adsorption efficiency of strongly basic AERs (80–100%) was much higher than that of weekly basic AERs (2–56%). The adsorption kinetics were limited by intraparticle diffusion. In particular, for CAs with a molecular volume of > 83.5 Å, the gellular AERs showed an obvious size exclusion effect that was not as apparent for the macroporous AERs. The adsorption capacity and affinity were highly related to the polymer matrix. The polystyrene AERs showed 1.60–3.00 times higher maximum adsorption and 2.00–3.80 times greater adsorption affinity than their polyacrylic counterparts. Adsorption also depended on the CA structure. The carbon and carboxyl number of the CA affect the total negative atomic charge density, which in turn affects the CA–AER electrostatic interaction. Besides, hydrogen bonds between the carboxyl group and the AER matrix increased CA adsorption; this effect was especially prominent for diprotic CAs.

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“…In the Raman spectra, the OH stretching vibration of water molecules at 3000-3700 cm −1 is suggested by an obvious wide peak, which is often convolved into three components, corresponding to the water molecules with strong, weak H-bonds and OH•••F, respectively (Figure 2e). [36,44,45] The integral area of fitted peak is used to further quantify the amount of water molecules with different H-bonds (Figure 2f). The ratio of each component to the total area is calculated (Figure 2g).…”

Section: Resultsmentioning

confidence: 99%

An Anti‐Freezing Hydrogel Electrolyte for Flexible Zinc‐Ion Batteries Operating at −70 °C

Song

Wang

et al. 2023

Adv Funct Materials

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Aqueous zinc‐ion batteries (ZIBs) are considered as the promising candidate of flexible energy storage devices due to their high safety, eco‐friendliness, and low‐cost. However, conventional flexible aqueous ZIBs undergo severe capacity loss at bending and subzero temperature states. Herein, an anti‐freezing hydrogel electrolyte based on zinc tetrafluoroborate (Zn(BF4)2) and polyacrylamide (PAM) is developed. Owing to the strong electronegativity of F atoms, BF4− anions interact with water molecules by OH···F to replace the OH···O between water molecules in Zn(BF4)2‐PAM hydrogel electrolyte, inhibiting the formation of ice crystal lattice in hydrogel electrolyte at low‐temperature. Therefore, the Zn(BF4)2‐PAM hydrogel remains unfrozen state, good flexibility, and high ionic conductivity even at −70 °C, which ensures that they can act as the electrolytes of anti‐freezing flexible ZIBs. As a proof of concept, anti‐freezing flexible ZIBs with all‐in‐one integrated configuration are assembled based on Zn(BF4)2‐PAM hydrogel. They display enhanced electrochemical performance at −70 °C, such as high capacity retention and remarkable cyclic stability. Furthermore, they also maintain stable electrochemical performance under different bending states even at −70 °C. This work broadens the practical application of flexible aqueous ZIBs at ultralow temperature.

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Hydrogen bonding effect on Raman modes of Formic acid-water binary solutions

Cited by 19 publications

References 35 publications

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Adsorption of Low-Molecular-Weight Carboxylic Acids to Anion Exchange Resins with Various Properties and the Mechanisms of Interaction

An Anti‐Freezing Hydrogel Electrolyte for Flexible Zinc‐Ion Batteries Operating at −70 °C

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