Redox transformations of simple vanadium phosphates: the synthesis of ε-VOPO4

Lim, Shiao C.; Vaughey, J. T.; Harrison, William T. A.; Dussack, Laurie L.; Jacobson, Allan J.; Johnson, Jack W.

doi:10.1016/0167-2738(96)00007-0

Cited by 48 publications

(34 citation statements)

References 13 publications

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“…The modifications c-and d-VOPO 4 [15][16][17] with structures related to vanadyl pyrophosphate (V IV O) 2 P 2 O 7 , and e-VOPO 4 [18] related to the b-modification are all from the view point of intercalation reactions uninteresting. Recently, the crystal structure of d-VOPO4 was determined from powder X-ray diffraction data [19].…”

Section: Vanadyl Phosphatesmentioning

confidence: 99%

Intercalation chemistry of layered vanadyl phosphate: a review

Beneš

Melánová

Svoboda

et al. 2012

J Incl Phenom Macrocycl Chem

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The intercalation chemistry of layered a I modification of vanadyl phosphate and vanadyl phosphate dihydrate is reviewed. The focus is on neutral molecular guests and on metal cations used as guest species. The basic condition for the ability of the neutral molecules to be intercalated into vanadyl phosphate is a presence of an electron donor atom in them. The most commonly used guest compounds are those containing oxygen, nitrogen or sulfur as electron donor atoms. Regarding the molecules containing oxygen, various compounds were used as molecular guests starting from water to alcohols, ethers, aldehydes, ketones, carboxylic acids, lactones, and esters. An arrangement of the guest molecules in the interlayer space is discussed in connection with the data obtained by powder X-ray diffraction, thermogravimetry, IR and Raman spectroscopies, and solid-state NMR. In some cases, the local structure was suggested on the basis of quantum chemical calculations. Besides of those O-donor guests, also N-donor guests such as amines, nitriles and nitrogenous heterocycles and S-donor guests such as tetrathiafulvalene were intercalated into VOPO 4 . Also intercalates of complexes like ferrocene were prepared. Intercalation of cations is accompanied by a reduction of vanadium(V) to vanadium(IV). In this kind of intercalation reactions, an iodide of the intercalated cation is often used as it serves both as a mild reduction agent and as a source of the intercalated species. Intercalates of alkali metals, hydronium and ammonium were prepared and characterized. In the case of lithium and sodium intercalates, a staging phenomenon was observed. These redox intercalated vanadyl phosphates undergo ion exchange reactions which are discussed from the point of the nature of cations involved in the exchange. Vanadyl phosphates in which a part of vanadium atom is replaced by other metals are also briefly reviewed.

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Section: Vanadyl Phosphatesmentioning

confidence: 99%

Intercalation chemistry of layered vanadyl phosphate: a review

Beneš

Melánová

Svoboda

et al. 2012

J Incl Phenom Macrocycl Chem

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“…q-VOPO 4 has been synthesized by the electrochemical de-intercalation at room temperature of the hydrogen from VPO 4 ÁH 2 O and VOH x PO 4 [31]. VPO 4 ÁH 2 O can be reformed from q-VOPO 4 by hydrogen insertion in the presence of platinum at 150 jC [32].…”

Section: The Hydrogen Tungsten Bronzesmentioning

confidence: 99%

Hydrogen motion in oxides: from insulators to bronzes

Whittingham

2004

Solid State Ionics

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“…Thus, they may be related to the activity of the catalyst [3]. In lithium battery research, δand especially ε-VOPO 4 , the most recently discovered polymorph [4], show promising electrochemical properties [5][6][7][8]. In both fields of research, knowledge of the crystal structure of the respective phases is desirable, since it is a prerequisite to uncover structure-(re)activity relationships.…”

Section: Introductionmentioning

confidence: 99%

“…Since the discovery of ε-VOPO 4 by Lim et al, it was argued that its structure should be both similar to β-VOPO 4 [9], the most stable polymorph, and related to monoclinic VPO 4 •H 2 O [10], which can be reversibly converted to ε-VOPO 4 [4]. This claim was further substantiated by recent work of Song et al, where a structure model derived from monoclinic VPO 4 •H 2 O (space group C2/c) was refined successfully in the space group P2 1 /n [8].…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of ε-VOPO4

Girgsdies

Dong

Bartley

et al. 2006

Solid State Sciences

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The crystal structure of ε-VOPO 4 was determined in the space group Cc from X-ray powder diffraction data using a rigid body approach. The resulting structure is compared to a recently published, slightly different structure model (space group P2 1 /n) using Rietveld refinement. It was found that the new Cc model consistently yields a better fit to the observed data and exhibits a less distorted, more stable geometry. The crystal structure of ε-VOPO 4 is discussed in comparison to β-VOPO 4 , monoclinic VPO 4 •H 2 O, and other related structures.

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Redox transformations of simple vanadium phosphates: the synthesis of ε-VOPO4

Cited by 48 publications

References 13 publications

Intercalation chemistry of layered vanadyl phosphate: a review

Intercalation chemistry of layered vanadyl phosphate: a review

Hydrogen motion in oxides: from insulators to bronzes

The crystal structure of ε-VOPO4

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