Hydrogen and boric acid production via boron hydrolysis

Wahbeh, Bara; Hamed, Tareq Abu; Kasher, Roni

doi:10.1016/j.renene.2012.04.043

Cited by 13 publications

(18 citation statements)

References 13 publications

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“…Scheme describes the reactions involved in the wet thermal processing. At all temperatures explored in this report, elemental boron reacts with oxygen or steam to form boron oxide. , Metaboric acid [(BOH) 3 O 3 ] is formed as boron oxide encounters water in the form of steam . Exposure to excess steam reacts with metaboric acid to form gaseous boric acid [B(OH) 3 ].…”

Section: Resultsmentioning

confidence: 99%

“…At all temperatures explored in this report, elemental boron reacts with oxygen or steam to form boron oxide. 58,59 Metaboric acid [(BOH) 3 O 3 ] is formed as boron oxide encounters water in the form of steam. 60 Exposure to excess steam reacts with metaboric acid Similarly, at sufficiently high temperatures, BN particles with exposed defect sites react with oxygen to form boric acid and ammonia.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Scalable Purification of Boron Nitride Nanotubes via Wet Thermal Etching

Marincel

Adnan

et al. 2019

Chem. Mater.

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Boron nitride nanotubes (BNNT) are poised to fill an electrically insulating, high-temperature, highstrength niche. Despite significant progress over the past two decades, BNNTs are not yet synthesized in high enough quantity and quality to permit their use in engineering applications. The next necessary step to make BNNTs accessible for research and applications is to improve the availability of high-quality BNNTs. Here, we present a scalable bulk purification technique that yields high-purity BNNTs. Bulk synthesized material is introduced to a wet oxygen environment at elevated temperatures to remove elemental boron and hexagonal boron nitride impurities with a final yield of purified BNNTs near 10 wt %. This process shows full removal of impurities, as observed by scanning electron microscopy (SEM), cryogenic transmission electron microscopy (TEM), and high-resolution TEM. X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy show minimal BNNT functionalization, while high-resolution TEM shows damage to large-diameter BNNTs.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Scalable Purification of Boron Nitride Nanotubes via Wet Thermal Etching

Marincel

Adnan

et al. 2019

Chem. Mater.

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“…Accordingly, B(OH) 3 , the other product of boron hydrolysis, was also observed (Figures S12–S14). B(OH) 3 is a volatile compound, and once it has formed on the surface of the illuminated boron sample, it will be gasified owing to the high temperature, thus keeping the boron catalyst surface exposed to the gaseous reaction species (e.g., H 2 O, CO 2 , or H 2 ). Indeed, after the test, B(OH) 3 was not observed on the boron powders (Figure d) but as a deposit on the walls of the reaction cell probably owing to the low surface temperature of the walls (Figure S12).…”

Section: Figurementioning

confidence: 99%

Elemental Boron for Efficient Carbon Dioxide Reduction under Light Irradiation

et al. 2017

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The photoreduction of CO2 is attractive for the production of renewable fuels and the mitigation of global warming. Herein, we report an efficient method for CO2 reduction over elemental boron catalysts in the presence of only water and light irradiation through a photothermocatalytic process. Owing to its high solar‐light absorption and effective photothermal conversion, the illuminated boron catalyst experiences remarkable self‐heating. This process favors CO2 activation and also induces localized boron hydrolysis to in situ produce H2 as an active proton source and electron donor for CO2 reduction as well as boron oxides as promoters of CO2 adsorption. These synergistic effects, in combination with the unique catalytic properties of boron, are proposed to account for the efficiency of the CO2 reduction. This study highlights the promise of photothermocatalytic strategies for CO2 conversion and also opens new avenues towards the development of related solar‐energy utilization schemes.

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“…The first stage lasts only about 15 minutes and accounts for ~70% of the hydrogen that is released. The last stage progresses slowly and can continue until the boron carbide is completely oxidized [70]. To understand the oxidation behavior of boron carbide it is important to understand the nature of the B2O3 that forms.…”

Section: Boron Carbidementioning

confidence: 99%

“…Temperature effect on mass conversion and gasification rate at 773, 873, 973, and 1073K and water flow rate of 0.5mL/min[70] …”

mentioning

confidence: 99%

Evaluation of Aluminum-Boron Carbide Neutron Absorbing Materials for Interim Storage of Used Nuclear Fuel

Wierschke¹

2015

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Hydrogen and boric acid production via boron hydrolysis

Cited by 13 publications

References 13 publications

Scalable Purification of Boron Nitride Nanotubes via Wet Thermal Etching

Scalable Purification of Boron Nitride Nanotubes via Wet Thermal Etching

Elemental Boron for Efficient Carbon Dioxide Reduction under Light Irradiation

Evaluation of Aluminum-Boron Carbide Neutron Absorbing Materials for Interim Storage of Used Nuclear Fuel

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