Extra highways for proton diffusion in TiO2@MIL-101-Cr/Nafion composite membranes with high single-cell performance

Li, Xu; Qian, Libing; Liu, Lei; Liu, Zhe; Zhang, Haoliang; Yang, Lan; Zhang, Dongwei; Chen, Zhiyuan; Fang, Pengfei; He, Chunqing

doi:10.1016/j.jpowsour.2023.232906

Cited by 13 publications

(2 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The σ of SPEEK/HPW@MIL-2 at 60 C and 100% RH is higher than that of pristine Nafion membrane (DuPont D-520) (50 mS cm À1 ). 47 With the increase in temperature, the σ of all the membrane increased because the molecular chains became stretched, and the free volume and WU increased, which was conducive to the transport of protons according to vehicle mechanism (shown in Figure 7). Compared with the pristine SPEEK, the σ of the SPEEK/HPW composite membrane was significantly improved at all temperatures investigated, indicating that HPW is an effective proton donor.…”

Section: σ and Activation Energy (Ea)mentioning

confidence: 99%

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Zhang

Pei

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Incorporating phosphotungstic acid (HPW) in proton exchange membranes (PEMs) is an effective way to improve proton conductivity, but its leakage remains a problem. It can be solved by immobilizing acid in membranes to enhance the stability of PEMs. Herein, we proposed a novel sulfonated poly(ether ether ketone) (SPEEK) composite membrane (SPEEK/HPW@MIL) that was prepared by blending amino-modified MIL-101(Cr) to anchor HPW. In this work, HPW was anchored through hydrogen bond to minimize its leakage and enhance the overall compatibility. The incorporation of MIL-101(Cr)-NH 2 also helped lower the swelling ratio and improve the dimensional stability. Compared with pristine SPEEK and SPEEK/MIL membrane, the proton conductivity of the SPEEK/HPW@MIL composite membrane increased by 26% and 14%, respectively. The superior performance recommended a promising conception for anchoring HPW in PEMs.

show abstract

Section: σ and Activation Energy (Ea)mentioning

confidence: 99%

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Zhang

Pei

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The most commercialized PEM is the perfluorinated sulfonic acid polymer (PFSA), of which the most widely used is the Nafion membranes. Although Nafion membranes have better physicochemical properties, [4][5][6][7][8] they have inherent drawbacks such as high cost, complex manufacturing processes, and limited use temperature. Therefore, researchers have turned their attention to nonfluorinated polymer membranes.…”

mentioning

confidence: 99%

Enhanced proton conductivity of SPEEK membranes by constructing hydrogen bond network through doping ionic liquid and graphene oxide

Lv,

Qu,

Sun

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

So as to improve proton conductivity at medium temperatures while reducing the loss of ionic liquids (ILs), this article fabricated a series of hybrid membranes with sulfonated poly (ether ether ketone) (SPEEK) as their base material, 1‐allyl‐3‐methylimidazolium chloride ([AMIM][Cl]) as their primary proton conductor, and graphene oxide (GO) as their filler. The characterization results showed that the –SO3H groups of SPEEK formed acid–base pairs with the imidazole ring of [AMIM][Cl] at the interface where electrostatic attraction inhibited the main‐chain migration of the SPEEK. At the same time, the large hydrogen bond network formed between [AMIM][Cl], GO and SPEEK provided more jump sites for proton transfer. Proton conduction of the prepared membranes was enhanced by way of low potential energy barriers. At 120°C, SPEEK/IL/GO‐2% exhibited a proton conductivity of 21.35 mS/cm, and the IL loss rate was 20.17%. The characterization results demonstrated that the prepared SPEEK/IL/GO composite membranes had excellent physicochemical properties, dimensional stability, high proton conductivity, and low IL loss, which were expected to be used in practical conditions at medium temperature.Highlights Large hydrogen bonding network provides additional proton hopping sites. Physical cross‐linking limits the leaching of ionic liquid. SPEEK/IL/GO‐2% membrane achieves a conductivity of 21.35 mS/cm at 120°C.

show abstract

In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

Zhang,

Xie,

Wang

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

For nearly a century, the excessive discharge of organic contaminants has gradually polluted water and endangered people's health, and photocatalysis has been prominently employed to remove persistent recalcitrant organic. Here, MIL‐101(Cr) was firstly employed to introduce thin‐layered Bi2O2CO3 for the formation of Bi2O2CO3/MIL‐101(Cr) nanosheet composite, by a simple and low‐temperature in‐situ growth approach. The phase, morphology, optical, and surface characteristics of the fabricated composite were characterized through XRD, FTIR, SEM‐EDS, N2 adsorption–desorption, UV–Vis DRS, PL, TG, and XPS techniques, and the ability in the photocatalytic breakdown of rhodamine B (RhB) molecule under visible light was also studied. The results of characterization analysis and optical analysis exhibited that Bi2O2CO3/MIL‐101(Cr) has large pore size, good visible light response‐ability, and the heterojunction created by intercalating Bi2O2CO3 on MIL‐101(Cr). Photocatalytic studies revealed that Bi2O2CO3/MIL‐101(Cr) had superior RhB degradation activity than pure MIL‐101(Cr) and Bi2O2CO3, which achieved 97.1% with visible light irradiation for 20 mg/l RhB. Meanwhile, the Bi2O2CO3/MIL‐101(Cr) composite displayed good recyclability after three cycles as revealed by XRD and FTIR analysis proving their excellent stability. This study provides feasible insight into developing novel and efficient MIL‐101‐based heterojunction catalysts for environmental remediation in the future.

show abstract

Extra highways for proton diffusion in TiO2@MIL-101-Cr/Nafion composite membranes with high single-cell performance

Cited by 13 publications

References 70 publications

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Enhanced proton conductivity of SPEEK membranes by constructing hydrogen bond network through doping ionic liquid and graphene oxide

In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

Contact Info

Product

Resources

About

Extra highways for proton diffusion in TiO2@MIL-101-Cr/Nafion composite membranes with high single-cell performance

Cited by 13 publications

References 70 publications

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Anchoring HPW by amino‐modified MIL‐101(Cr) to improve the properties of SPEEK in proton exchange membranes

Enhanced proton conductivity of SPEEK membranes by constructing hydrogen bond network through doping ionic liquid and graphene oxide

In‐situ construction of Bi2O2CO3/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

Contact Info

Product

Resources

About

In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water