Nanocellulose is a sustainable material which holds promise for many energy-related applications. Here, nanocrystalline cellulose is used to prepare proton exchange membranes (PEMs). Normally, this nanomaterial is highly dispersible in water, preventing its use as an ionomer in many electrochemical applications. To solve this, we utilized a sulfonic acid crosslinker to simultaneously improve the mechanical robustness, water-stability, and proton conductivity (by introducing -SOH functional groups). The optimization of the proportion of crosslinker used and the crosslinking reaction time resulted in enhanced proton conductivity up to 15 mS/cm (in the fully hydrated state, at 120 °C). Considering the many advantages, we believe that nanocellulose can act as a sustainable and low-cost alternative to conventional, ecologically problematic, perfluorosulfonic acid ionomers for applications in, e. fuel cells and electrolyzers.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9319731 | PMC |
| http://dx.doi.org/10.3390/membranes12070658 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Use of Knives With Versus Without Integrated Water-jet Function During Peroral Endoscopic Myotomy for Patients With Achalasia: A Meta-analysis.
Surg Laparosc Endosc Percutan Tech
January 2025
Department of Surgery, Division of Gastrointestinal Surgery, University of South Florida Morsani College of Medicine, Tampa, FL.
Background: Peroral endoscopic myotomy (POEM) is a well-established endoscopic treatment for achalasia, utilizing an endoscopic knife for dissection. Recently, new knives with an integrated water-jet (WJ) function have been introduced. This study aims to compare the technical, perioperative, and late postoperative outcomes between WJ knives and conventional (C) knives, which lack the WJ function, through a pairwise meta-analysis of published comparative studies.
View Article and Find Full Text PDFNovel ionic liquid-infused PVA-based anion exchange membranes boosting bioelectricity yield from microbial fuel cells.
Heliyon
January 2025
Amity Institute of Microbial Technology, Amity University Rajasthan, Kant Kalwar, Jaipur, 303002, Rajasthan, India.
The goal of this research is to develop and characterize low-cost NHI doped polyvinyl alcohol (PVA)-4-ethyl-4-methylmorpholiniumbromide (ionic liquid) anion exchange membranes (AEM) and its application for membrane cathode assembly. Physical characterization like FTIR, POM, and XRD notified the functional groups, basic structure, and amorphosity of the produced membrane, and it was employed in single-chambered microbial fuel cells (sMFCs) as a separator. The membranes in terms of oxygen diffusion, proton conductivity, and ion exchange capabilities were evaluated.
View Article and Find Full Text PDFKinetics of reformation of the S state capable of progressing to the S state after the O release by photosystem II.
Photosynth Res
January 2025
Department of Chemistry, Graduate School of Science and Technology, Proteo-Science Research Center, Ehime University, Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan.
The active site for water oxidation in photosystem II (PSII) comprises a MnCaO cluster adjacent to a redox-active tyrosine residue (Tyr). During the water-splitting process, the enzyme transitions through five sequential oxidation states (S to S), with O evolution occurring during the STyr· to STyr transition. Chloride also plays a role in this mechanism.
View Article and Find Full Text PDFAmide proton transfer-weighted (APTw) imaging and derived quantitative metrics in evaluating gliomas: Improved performance compared to magnetization transfer ratio asymmetry (MTR).
Acad Radiol
January 2025
Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China (H.Z., Y.L., Y.L., Y.D., N.S., Y.X., S.Y., Y.F., J.Z., D.L., L.L., W.Z.). Electronic address:
Rationale And Objectives: Isocitrate dehydrogenase (IDH) status, glioma subtypes and tumor proliferation are important for glioma evaluation. We comprehensively compare the diagnostic performance of amide proton transfer-weighted (APTw) MRI and its related metrics in glioma diagnosis, in the context of the latest classification.
Materials And Methods: Totally 110 patients with adult-type diffuse gliomas underwent APTw imaging.
Highly Tension-Strained Copper Concentrates Diluted Cations for Selective Proton-Exchange Membrane CO2 Electrolysis.
Angew Chem Int Ed Engl
January 2025
University of Science and Technology of China, Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, CHINA.
Electrolysis of carbon dioxide (CO2) in acid offers a promising route to overcome CO2 loss in alkaline and neutral electrolytes, but requires concentrated alkali cations (typical ≥3 M) to mitigate the trade-off between low pH and high hydrogen evolution reaction (HER) rate, causing salt precipitation. Here we report a strategy to resolve this problem by introducing tensile strain in a copper (Cu) catalyst, which can selectively reduce CO2 to valuable multicarbon products, particularly ethylene, in a pH 1 electrolyte with 1 M potassium ions. We find that the tension-strained Cu creates an electron-rich surface that concentrates diluted potassium ions, contributing to CO2 activation and HER suppression.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!