Polymorphism in copper pyrovanadate

Slobodin, B. V.; Сурат, Л. Л.; Samigullina, R. F.

doi:10.1134/s0036023609050192

Cited by 12 publications

(19 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most notable difference in phase distribution is the prominence of the Ziesite (β‐Cu 2 V 2 O 7 ) phase in library A (550 °C) and Blossite (α‐Cu 2 V 2 O 7 ) phase in library B (610 °C). The phase transition β‐Cu 2 V 2 O 7 → α‐Cu 2 V 2 O 7 has been reported at 605 °C, and the observed phase behavior in our libraries is in excellent agreement with these recent detailed studies.…”

Section: Resultssupporting

confidence: 93%

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System

Zhou

Yan

Shinde

et al. 2015

Advanced Energy Materials

103

View full text Add to dashboard Cite

Solar photoelectrochemical generation of fuel is a promising energy technology yet the lack of an efficient, robust photoanode remains a primary materials challenge in the development and deployment of solar fuels generators. Metal oxides comprise the most promising class of photoanode materials, but no known material meets the demanding requirements of low band gap energy, photoelectrocatalysis of the oxygen evolution reaction (OER), and stability under highly oxidizing conditions. Here, the identification of new photoelectroactive materials is reported through a strategic combination of combinatorial materials synthesis, high‐throughput photoelectrochemistry, optical spectroscopy, and detailed electronic structure calculations. Four photoelectrocatalyst phases, α‐Cu2V2O7, β‐Cu2V2O7,γ‐Cu3V2O8, and Cu11V6O26, are reported with band gap energy at or below 2 eV. The photoelectrochemical properties and 30 min stability of these copper vanadate phases are demonstrated in three different aqueous electrolytes (pH 7, pH 9, and pH 13), with select combinations of phase and electrolyte exhibiting unprecedented photoelectrocatalytic stability for metal oxides with sub‐2 eV band gap. Through integration of experimental and theoretical techniques, new structure‐property relationships are determined and establish CuO–V2O5 as the most prominent composition system for OER photoelectrocatalysts, providing crucial information for materials genomes initiatives and paving the way for continued development of solar fuels photoanodes.

show abstract

Section: Resultssupporting

confidence: 93%

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System

Zhou

Yan

Shinde

et al. 2015

Advanced Energy Materials

103

View full text Add to dashboard Cite

show abstract

“…These observations on the SCS samples are consistent with earlier reports on Cu−V−O samples synthesized by other methods, which showed the β to α transition at 605−610°C. 19 The SCS of Cu 3 V 2 O 8 showed behavior contrasting the other two compounds with lower Cu content. The as-synthesized sample showed mostly the crystalline phase of γ-Cu 3 V 2 O 8 along with zeisite (β-Cu 2 V 2 O 7 ) ( Figure 3c).…”

Section: Methodsmentioning

confidence: 92%

Rapid One-Pot Synthesis and Photoelectrochemical Properties of Copper Vanadates

Hossain¹,

Sotelo²,

Sarker³

et al. 2019

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Solution combustion synthesis (SCS) is shown to be versatile for the rapid-one-pot synthesis of three compounds and four polymorphs in the Cu−V−O ternary family: α-CuV 2 O 6 , αand β-Cu 2 V 2 O 7 , and γ-Cu 3 V 2 O 8. These compounds feature copper/vanadium stoichiometric ratios ranging from 1:1 to 3:1; their structural, electronic, optoelectronic, and photoelectrochemical attributes were comprehensively characterized by a combination of theoretical and experimental techniques. The main contribution of the present study is the demonstration that a range of stoichiometries in this compound family can be derived simply by tuning the precursor mole ratio in the SCS procedure. The Cu−V−O family of samples, derived by SCS, is shown to exemplify the strong effect of compound stoichiometry on the optoelectronic and photoelectrochemical properties. Overall, α-CuV 2 O 6 showed the best performance, rooted in the direct nature of the optical transition in this material. Finally, SCS is very timeefficient and the various compositions can be obtained in a matter of minutes, as opposed to hours or even days in classical solution-based or ceramic synthesis routes.

show abstract

“…1c), the integration of different phases into CaSrBi 2 O 5 , CuSrO 2 , CaBi 2 O 4 and minor CuO phases occurs as a result of diffusion of oxides at 873 K for 60 min. According to Slobodin & Fotiev (1994) and Hallstedt & Gauckler (2004), the stable CaSrBi 2 O 5 phase can be synthesized at about 984 K, which is about 100 K above the pre-sintered temperature reported in this paper; this lowering of the synthesis temperature is a result of the superiority of the Pechini sol-gel method, for which the thermodynamic energy of synthesized nanomaterials is less than that of other chemical preparation methods.…”

Section: Resultsmentioning

confidence: 58%

An enhancement in structural and superconducting properties of Bi2212 epitaxial thin films grown by the Pechini sol–gel method

Wang

Zhang

et al. 2013

J Appl Crystallogr

View full text Add to dashboard Cite

Bi2Sr2CaCu2O8+δ (Bi2212) superconducting thin films were prepared by the Pechini sol–gel method using nitrates as reactants. The precursor sol was deposited on SrTiO3(001) single‐crystal substrates via the spin‐coating method, and the results revealed the lowering of the Bi2212 phase‐transition temperature; meanwhile the sintering time was significantly reduced. According to this investigation, the phase purity and crystallinity of Bi2212 thin films were obviously improved owing to the stable gel mechanism; the Tc,onset transition temperature value of the pure c‐axis Bi2212 thin films rose to about 95 K.

show abstract

Polymorphism in copper pyrovanadate

Cited by 12 publications

References 9 publications

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System

Rapid One-Pot Synthesis and Photoelectrochemical Properties of Copper Vanadates

An enhancement in structural and superconducting properties of Bi2212 epitaxial thin films grown by the Pechini sol–gel method

Contact Info

Product

Resources

About

Polymorphism in copper pyrovanadate

Cited by 12 publications

References 9 publications

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V2O5 System

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V2O5 System

Rapid One-Pot Synthesis and Photoelectrochemical Properties of Copper Vanadates

An enhancement in structural and superconducting properties of Bi2212 epitaxial thin films grown by the Pechini sol–gel method

Contact Info

Product

Resources

About

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System

High Throughput Discovery of Solar Fuels Photoanodes in the CuO–V₂O₅ System