Remarkably high mixed proton and electron conduction arising from oxidized single-wall carbon nanotubes at room temperature is demonstrated. The respective proton and electronic conductivities are 1.40 and 8.0 × 10 S cm in the in-plane direction, and 3.1 × 10 and 1.1 × 10 S cm in the out-of-plane direction, indicating their potential in a wide range of solid electrolyte membranes.
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http://dx.doi.org/10.1039/d2ra00521b | DOI Listing |
Mikrochim Acta
January 2025
Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, College of Optoelectronic Materials and Technology, Jianghan University, Wuhan, 430056, China.
An electrochemical sensor is presented for the detection of the chloramphenicol (CAP) based on a bimetallic MIL-101(Fe/Co) MOF electrocatalyst. The MIL-101(Fe/Co) was prepared by utilizing mixed-valence Fe (III) and Co (II) as metal nodes and terephthalic acid as ligands with a simple hydrothermal method and characterized by SEM, TEM, XRD, FTIR, and XPS. Electrochemical measurements such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) showed that bimetallic MIL-101(Fe/Co) had the faster electron transfer, larger electroactive area, and higher electrocatalytic activity compared with their monometallic counterparts due to the strong synergistic effect between bimetals.
View Article and Find Full Text PDFMagn Reson Chem
January 2025
Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands.
Parahydrogen induced polarisation (PHIP) is often used to enhance the sensitivity of NMR, with the purpose of extending the applicability of the technique. Nuclear spin hyperpolarisation obtained via PHIP is generally localised on the protons derived from the addition of para-enriched hydrogen to an unsaturated substrate. This limitation has been previously addressed by pulse schemes that can spread this hyperpolarised magnetisation through the entire network of J-coupled protons in the product molecule.
View Article and Find Full Text PDFPhys Med
January 2025
The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Cyclotron Centre Bronowice, Krakow, Poland.
Purpose: With the increasing use of proton therapy, there is a growing emphasis on including radiation quality, often quantified by linear energy transfer, as a treatment plan optimization factor. The Timepix detectors offer energy-sensitive particle tracking useful for the characterization of proton linear energy transfer. To improve the detector's performance in mixed radiation fields produced in proton therapy, we customized the detector settings and performed the per-pixel energy calibration.
View Article and Find Full Text PDFDalton Trans
January 2025
Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
Appropriately designed catalysts help to minimise the energy required to convert the energy-poor feedstock HO into energy-rich molecular H. Herein, two families of pyridazine-based cryptates, mononuclear [MLi](BF) and mixed metal dinuclear [MCuLi](BF) (M = Fe, Co, Cu or Zn; Li is the Schiff base cryptand made by 2 : 3 condensation of tris(2-aminoethyl)amine and 3,6-diformylpyridazine), are investigated as potential electrocatalysts for the hydrogen evolution reaction (HER) in MeCN with acetic acid as the proton source. The synthesis and structures of a new mixed metal cryptate, [ZnCuLi](BF), and the tetrafluoroborate analogue of the previously reported perchlorate salt of the mono-zinc cryptate, [ZnLi](BF)·0.
View Article and Find Full Text PDFLangmuir
January 2025
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414000 Hunan, P. R. China.
The high-temperature proton exchange membranes suffer from weak binding strength for phosphoric acid molecules, which seriously reduce the fuel cell efficiency, especially operation stability. Introduction of microporous material in the membrane can effectively reduce the leaching of phosphoric acid. However, due to the poor compatibility between the polymer and fillers, the membrane's performance significantly reduced at high fillers content.
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