Liquid fuel cells

Soloveichik, Grigorii L.

doi:10.3762/bjnano.5.153

Cited by 153 publications

(131 citation statements)

References 212 publications

(291 reference statements)

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“…[9][10][11][12] Although the BH 4 − oxidation in alkaline aqueous solutions is a frequently discussed topic, there are still very few studies devoted to BOR in non-aqueous systems. Finkelstein 13 In fact, the selection of the right solvent is even more important when working with OGBs, as their solubility and stability depend on the organic solvent properties (e.g., polarity, acidity, and compatible reactivity).…”

Section: Bhmentioning

confidence: 99%

“…However, certain applications call for reducing powers greater than NaBH 4 (such as Superhydride, LiEt 3 BH), while others require the reducing powers to be attenuated (such as sodium cyanoborohydride, NaBH 3 CN). 2 Organic chemists have successfully tuned the reducing power of NaBH 4 by attaching organic electron donating or withdrawing groups to the boron center, which can also drive regio-and stereoselectivity.…”

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confidence: 99%

“…4,5 The energy applications of the smaller NaBH 4 have been well-known for some time, both as a hydrogen carrier or as energy carrier, i.e., working as a liquid fuel (in alkaline solution) to directly feed a direct borohydride fuel cell (DBFC). 6 In fact, the DBFC is recognized as a suitable device to power portable and mobile applications.…”

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confidence: 99%

“…2 Organic chemists have successfully tuned the reducing power of NaBH 4 by attaching organic electron donating or withdrawing groups to the boron center, which can also drive regio-and stereoselectivity. Judicious choice of reducing agent allows for selective reduction of the desired functional group in the presence of other reducible functional groups.…”

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confidence: 99%

“…It has higher theoretical cell voltage (1.64 V), higher energy density (9296 Wh kg −1 ) and higher capacity (5669 Ah kg −1 ) than most fuel cell prototypes. 7,8 Furthermore, the typical borohydride (BH 4 − ) oxidation reaction (BOR) can generate up to eight electrons per mole of NaBH 4 (Eq. 1).…”

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confidence: 99%

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Electroreduction Ability of Organoborohydride Compounds

Cardoso

Sequeira

Bateman

et al. 2017

J. Electrochem. Soc.

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Sodium borohydride (BH, NaBH 4 ) has wide application as a reducing agent in organic and inorganic synthesis. Herein, sodium benzylborohydride (BBH, NaC 7 H 7 BH 3 ), sodium phenylborohydride (PBH, NaC 6 H 5 BH 3 ) and sodium 4-chlorophenylborohydride (CPBH, NaC 6 H 4 BH 3 Cl) are synthesized with high purity, as confirmed by NMR and FTIR. A direct relationship between the organic substituents and the reducing power of the borohydride center is investigated by electrochemical methods. Gold (Au) and platinum (Pt) disk electrodes are used to study the electrooxidation of these organoborohydride (OGB) compounds in dimethyl sulfoxide. Linear scan voltammetry and chronoamperometry measurements are carried out in 0.001-0.01 M solutions of each OGB at temperatures ranging from 25 to 65 • C. The results are directly compared to those obtained with BH solutions in the same conditions. A Pt microelectrode is used to perform diffusion coefficient measurements, whose values range from 9.10 × 10 −8 cm 2 s −1 for CPBH to 2.87 × 10 −7 cm 2 s −1 for BH. The number of exchanged electrons range between 1.6 for CPBH to 6.6 to BH and charge transfer coefficients are ca. 0.9-1.0. First order reactions are evaluated for the electrooxidation of the four studied borohydride compounds and the corresponding apparent activation energies range between 15 and 33 kJ mol −1 .

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