Growth of LiH2PO4 single crystals from phosphate solutions

Voronov, A. P.; Babenko, G.N.; Puzikov, V. M.; Iurchenko, A.N.

doi:10.1016/j.jcrysgro.2013.04.009

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…High-resolution MAS NMR measurements were made using polycrystalline LDP powder (99.99%), purchased from Aldrich, and purified by recrystallization in double processed purified water at 30 °C, following earlier reports. − 1 H MAS NMR line shape and spin–lattice relaxation time ( T 1 ) measurements were made using 300, 600, and 900 NMR spectrometers on samples with a systematic control of physisorbed water by pumping. On the 300 and 600 MHz NMR spectrometers, 4 mm Bruker CPMAS double-resonance NMR probes and a 3.2 mm homemade Low-E MAS NMR probe were used with a spinning rate of 13.5 kHz.…”

Section: Methodsmentioning

confidence: 99%

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

Kweon

Steven

et al. 2014

J. Phys. Chem. C

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LiH2PO4 (LDP) is a favored candidate for hydrogen fuel cells, but the mechanism of its high protonic conductivity remains unclear. A complicating factor has been the lack of resolution in the reported proton NMR spectra. We now report multinuclear magic angle spinning NMR in LDP at magnetic fields up to 21.2 T. Well-resolved 1H NMR spectra are observed that are assignable to protons in the short and long O–H···O hydrogen bonds and a peak to physisorbed H2O. The position and intensity for the H2O peak depend on the H 2 O content, implying fast exchange between the adsorbed H2O and the O–H···O protons. 31P and 7Li NMR spectra and spin–lattice relaxation measurements showed that the proton hopping/exchange processes involve concerted hindered rotational fluctuations of the phosphate groups. Conductivity data from adsorbed H2O-controlled samples clearly suggest that the mechanism of LDP’s protonic conductivity is dominantly the exchange (and hopping) of the adsorbed H2O protons with the short O–H···O hydrogen bonds, in contrast to an earlier model that ascribed it to intermolecular hopping of O–H···O protons. The new findings enable us to modulate LDP’s protonic conductivity by several orders of magnitude via controlling physisorbed water.

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Section: Methodsmentioning

confidence: 99%

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

Kweon

Steven

et al. 2014

J. Phys. Chem. C

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“…Furthermore, the freeze‐drying assisted impregnation–carbonization methods can effectively restrict the particle growth on the cellulose fiber surface. First, rapid freezing of the impregnated paper towel induces immediate supersaturation by solidification of the aqueous solvent, and thus, fast recrystallization of NaH 2 PO 4 , which drastically limits the crystal growth of alkali metal phosphates . Second, vanadium ions can form organometallic compounds with d ‐glucose, producing a homogenous glucose wrapping of the vanadium precursor salt upon solvent removal .…”

Section: Resultsmentioning

confidence: 99%

3D Interconnected Carbon Fiber Network‐Enabled Ultralong Life Na₃V₂(PO₄)₃@Carbon Paper Cathode for Sodium‐Ion Batteries

Kretschmer

Sun

Zhang

et al. 2016

Small

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Sericin-wrapped mesoporous silica nanoparticles (SMSNs) with pH and protease dual responsiveness are successfully fabricated as a lysosome-targeting drug delivery system by Guobin Wang, Lin Wang, Zheng Wang, and co-workers in article number 1602567. Such a dual responsive system offers a rapid doxorubicin release in lysosomes, which bypasses the membrane pump mediated drug efflux, thereby achieving the reversal of drug resistance. Mercuric Contamination An ultrasensitive surface-enhanced Raman scattering (SERS) substrate with large area uniform subnanometer "hot spots" is used to detect mercuric ions in water and sandy soil, by Hongbing Deng, Fubing Wang, Xiangheng Xiao, and co-workers in article number 1603347. The detection limit is as low as 8.3 × 10 −9 m. The uniformity of the SERS substrate is proved by Raman mapping, and the physical mechanism of SERS enhancements is supported by the finite difference time domain method. Drug Delivery In article number 1603109, Jiashu Sun, Haijun Yu, Xingyu Jiang, and co-workers utilize microfluidic chips to generate rigid pH-sensitive micellar nanocomplex (RPN) with tunable rigidity and acid-switchable surface charge for overcoming cancer drug resistance. The functionalization of RPN is realized through the incorporation of rigid PLGA core into pH-sensitive micelle. The RPN significantly enhances therapeutic efficacy against MCF-7/ADR xenograft tumor in mice, without the All inorganic halide perovskite nano-systems are expected to be promising materials for next generation lighting, display , and many other applications. Within two years, lots of interesting results have been observed. The synthesis and progresses on optoelectronic devices and optical applications, such as LEDs, photo-detectors, solar cells, and lasing, are summarized. Future directions, challenges and possible applications are also put forward. reviews Printing Functional 3D Microdevices by Laser-Induced Forward Transfer Slender, out-of-plane metal micro devices are made in a new spatial domain, by using laser-induced forward transfer (LIFT) of metals. Here, a thermocouple with a thickness of 10 µm and a height of 250 µm, consisting of platinum and gold pillars is demonstrated. Multi-material LIFT enables manufacturing in the micrometer to millimeter range, i.e., between lithography and other 3D printing technologies. communications Zeolitic imidazolate framework-8 (ZIF-8)-derived N-doped graphene analogous poly-hedrons (ZNGs) obtained via the direct carbonation of ZIF-8 are applied to photocat-alytic hydrogen evolution for the first time. The contents of different types of nitrogen atoms in ZNGs can be fine-tuned via the calcination temperature, which significantly influences the hydrogen evolution rate of the ZNGs. Hydrogen Evolution Ultrasensitive surface-enhanced Raman scattering (SERS) substrate with large-area uniform subnanometer "hot spots" is used to detect mercuric ion in water and sandy soil; the detection limit is as low as 8.3 × 10 −9 m. The uniformity of the SERS substrate is proved by Rama...

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“…LiH2PO4 is normally prepared by stoichiometric reaction between Li + from Li2СO3 and P 5+ from 85% orthophosphoric acid, see e.g. Voronov [51]. We prepared several batches of pure crystalline LDP, but finally used LiH2PO4, (CAS #13453-80-0) as provided by Sigma Aldrich, product number 442682-500G-A, lot # WXBC5367V, 99%.…”

Section: Preparation Of Lih2po4mentioning

confidence: 99%

Vapor pressure and specific electrical conductivity in the H2O–LiH2PO4–LiPO3 system—a novel electrolyte for water electrolysis at elevated temperature

Berg

Nikiforov

Bjerrum

2021

Ionics

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Lithium dihydrogen phosphate, LiH2PO4 (LDP) was studied for water electrolysis at elevated temperatures. It is shown that pure LDP, melting at ~224 °C and with correct DSC and X-ray diffraction diagram, in presence of sufficient humidity is stable up to 360 °C. Both solid and liquid LDP is structurally disordered and super-protonic conducting with conductivities reaching 0.48 S * cm -1 , when determined in sealed conductivity cells. The vapor pressure above LDP, pure and mixed with LiPO3 or H2O, was determined by means of Raman spectroscopy based on N2 as internal reference gas. Pressures up to ~20 bar at 350 °C were found and conductivities are given for solid and liquid states. Water splitting by electrolysis, 2H2O  2H2 + O2, was demonstrated by Raman spectroscopy at ~225°C and ~4.2 bar with Pt/W electrodes, thus showing that molten LDP has a significant potential for elevated temperature water electrolysis with high efficiency.

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Growth of LiH2PO4 single crystals from phosphate solutions

Cited by 9 publications

References 15 publications

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

3D Interconnected Carbon Fiber Network‐Enabled Ultralong Life Na₃V₂(PO₄)₃@Carbon Paper Cathode for Sodium‐Ion Batteries

Vapor pressure and specific electrical conductivity in the H2O–LiH2PO4–LiPO3 system—a novel electrolyte for water electrolysis at elevated temperature

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Growth of LiH2PO4 single crystals from phosphate solutions

Cited by 9 publications

References 15 publications

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH2PO4: Critical Role of Physisorbed Water in Its Protonic Conductivity

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH2PO4: Critical Role of Physisorbed Water in Its Protonic Conductivity

3D Interconnected Carbon Fiber Network‐Enabled Ultralong Life Na3V2(PO4)3@Carbon Paper Cathode for Sodium‐Ion Batteries

Vapor pressure and specific electrical conductivity in the H2O–LiH2PO4–LiPO3 system—a novel electrolyte for water electrolysis at elevated temperature

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High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

High Field MAS NMR and Conductivity Study of the Superionic Conductor LiH₂PO₄: Critical Role of Physisorbed Water in Its Protonic Conductivity

3D Interconnected Carbon Fiber Network‐Enabled Ultralong Life Na₃V₂(PO₄)₃@Carbon Paper Cathode for Sodium‐Ion Batteries