Facile synthesis of air-stable Prussian white microcubes via a hydrothermal method

Hu, Ming; Jiang, Ji-Sen

doi:10.1016/j.materresbull.2011.01.017

Cited by 28 publications

(19 citation statements)

References 42 publications

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“…The doublet (IS = 1.12 mm s −1 , QS = 1.47 mm s −1 ), represent a Fe 2+ cation with high-spin state. Then, both sub-spectral components can be assigned to the formed iron cyanide compound, where the values of the IS and QS are close to the ones measured in a pure sample of ferrous ferrocyanide (Hu and Jiang, 2011). It can be concluded that the formed compound is likely the iron(II) hexacyanoferrate(II) (Fe 2 [Fe(CN) 6 ]), also known as Berlin white (BW).…”

Section: Resultssupporting

confidence: 67%

From Prussian blue to iron carbides: high-temperature XRD monitoring of thermal transformation under inert gases

2017

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The thermal behavior and decomposition reaction of Prussian blue (PB) (Fe43+[Fe2+(CN)6]3·xH2O) was studied under inert atmosphere of argon by simultaneous thermogravimetry and differential scanning calorimetry, from room temperature up to 900 °C, with a heating rate of 5 K min−1. Parallel to the thermogravimetric measurements, the thermal process was monitored by in situ X-ray powder diffraction (XRD) technique under nitrogen atmosphere. The thermogravimetric data show six steps, corresponding to different stages of the decomposition reaction; comparable results are also obtained by in situ XRD. In addition, a set of PB samples heated up to selected temperatures (190, 300, 370, 540, 680, and 790 °C) were ex situ analyzed by powder XRD and Mössbauer spectroscopy. It is found that PB exhibits a negative thermal expansion prior to the water release from its crystalline lattice. Above 300 °C, the decomposition is based on the release of cyanogen gas from the PB structure. At 370 °C, a cubic iron cyanide compound is formed, while at higher temperatures several iron carbides were found. The subsequent thermal treatment of these carbides leads to the formation of metallic iron and graphite.

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Section: Resultssupporting

confidence: 67%

From Prussian blue to iron carbides: high-temperature XRD monitoring of thermal transformation under inert gases

2017

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“…[12] Fore xample,t he etching rate can be faster in regions with more defects.I tw as previously reported that the flat surfaces of PBAs are of alower stability than the corners or the edges. [15] Thus,t he middle of the external faces of the cubes can be dissolved faster during the etching process,l eading to an anoframe-like morphology.…”

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confidence: 99%

Synthesis of Monocrystalline Nanoframes of Prussian Blue Analogues by Controlled Preferential Etching

et al. 2016

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“…To affirm the structures of these samples, their X‐ray diffraction (XRD) patterns are collected and exhibited in Figure a. The KFe(0) sample displays a monoclinic structure (space group P 2 1 /c) with a unit cell parameters of a =10.108 Å, b =10.104 Å, c =10.114 Å, and β =92.938° (Figure b) . With the increase of hydrochloric acid concentration, the gradual disappearance of (−202) and (202) peaks indicates the structural changes from KFe(0) to KFe(2.0).…”

Section: Resultsmentioning

confidence: 99%

Size Engineering and Crystallinity Control Enable High‐Capacity Aqueous Potassium‐Ion Storage of Prussian White Analogues

et al. 2018

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Aqueous potassium‐ion batteries have demonstrated huge potential in the field of energy storage, owing to their low cost, environmental friendliness, and high safety, yet with poor cycling stability and rate capability. Here, potassium Prussian white analogues (K‐PW) with different gradients in crystallinity and size have been synthesized by controlling the acidity of hydrothermal environment. The as‐synthesized K1.93Fe[Fe(CN)6]0.97 ⋅ 1.82H2O nanoparticles deliver considerable reversible capacities of 142 mAh g−1 at 75 mA g−1, even 40 mAh g−1 at 9000 mA g−1, and high capacity retention of 88 % after 300 cycles at 1500 mA g−1 in a KNO3 aqueous electrolyte. High crystallinity and short ion‐diffusion length determine the fast ion‐intercalation kinetics and, thus, enable the superior rate capability. These results reveal the feasibility of using K‐PW for practical applications in aqueous potassium‐ion batteries.

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Facile synthesis of air-stable Prussian white microcubes via a hydrothermal method

Cited by 28 publications

References 42 publications

From Prussian blue to iron carbides: high-temperature XRD monitoring of thermal transformation under inert gases

From Prussian blue to iron carbides: high-temperature XRD monitoring of thermal transformation under inert gases

Synthesis of Monocrystalline Nanoframes of Prussian Blue Analogues by Controlled Preferential Etching

Size Engineering and Crystallinity Control Enable High‐Capacity Aqueous Potassium‐Ion Storage of Prussian White Analogues

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