Improved hydrogen generation from alkaline NaBH4 solution using cobalt catalysts supported on modified activated carbon

Xu, Dongyan; Dai, Ping; Guo, Qingjie; Yue, Xuehai

doi:10.1016/j.ijhydene.2008.09.065

Cited by 74 publications

(20 citation statements)

References 28 publications

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“…Further increase in NaOH concentration from 10 to 15 wt.% will cause the evident decrease in hydrogen generation rate. The same influence of NaOH concentration on the hydrolysis of sodium borohydride using Co-B/AC catalyst was also found [31]. Although many researchers have investigated the effect of alkali concentration on hydrogen generation behaviors, the results are inconsistent and the reasons are unclear.…”

Section: Effect Of Kbh 4 Concentrationmentioning

confidence: 58%

Catalytic behavior of carbon supported Ni–B, Co–B and Co–Ni–B in hydrogen generation by hydrolysis of KBH4

Wang

Guo

et al. 2011

Fuel Processing Technology

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Section: Effect Of Kbh 4 Concentrationmentioning

confidence: 58%

Catalytic behavior of carbon supported Ni–B, Co–B and Co–Ni–B in hydrogen generation by hydrolysis of KBH4

Wang

Guo

et al. 2011

Fuel Processing Technology

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“…A new absorption band centered near 2330 cm À1 may be assigned to carbon-oxygen groups due to ketone. 36 From FTIR investigation, it has been proved that graphite oxide was reduced to graphene, but some functional groups remained without reduction.…”

Section: -3mentioning

confidence: 99%

Synthesis of graphene-based Co-B catalyst via simultaneous chemical reduction for hydrolysis of sodium borohydride

Özdemir

Haşimoğlu

Ahsen

2013

Journal of Renewable and Sustainable Energy

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Co-B nanoparticles are deposited on graphene sheets by simultaneous chemical reduction of Co þ2 and graphite oxides using NaBH 4 as the reducing agent. The reduced CoÀB/graphene nanocomposites were characterized by X-ray diffraction, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The results show that after reduction, not only considerable amount of functional groups has been removed but also exhibited formation of Co-B alloy on the graphene sheets. The catalytic activity of nanocomposites was investigated by the hydrolysis of NaBH 4 in aqueous solution. Graphene support material greatly enhances the hydrolysis of NaBH 4 with respect to graphite and active carbon supports, and chemical reduced graphene sheets can readily form stable aqueous colloids through electrostatic stabilization. The present method is promising for the synthesis of effective supported catalysts for hydrolysis of NaBH 4 . V C 2013 AIP Publishing LLC. [http://dx.

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“…Hence, some materials with high surface area are used as support material. 11 Activated carbon, 11 carbon, 3 Al 2 O 3 12 and PdTiO 2 4 can be used as suppport materials. Activated carbon is more advantageous than other support materials due to its porous, high surface area and functional groups in its structure.…”

Section: Introductionmentioning

confidence: 99%

Investigation of High-Activity Activated Carbon-Supported Co-Cr-B Catalyst in the Generation of Hydrogen from Hydrolysis of Sodium Borohydride

Baytar¹

2018

ACSi

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In this study, activated carbon-supported Co-Cr-B catalyst was synthesized by chemical impregnation and precipitation method for use in the catalytic hydrolysis of sodium borohydride (NaBH 4 ). The activity of Co-Cr-B / activated carbon (5-20%) obtained by using different ratios was investigated while synthesizing activated carbon-supported Co-Cr-B catalyst. The effects of some parameters such as NaOH Concentration (0-5%), NaBH 4 concentration (2.5-10%), amount of catalyst (25-100 mg) and solution ambient temperature were investigated in the catalytic hydrolysis of NaBH 4 . The hydrogen production rate of Co-Cr-B catalyst without support in hydrolysis of NaBH 4 was found as 6.5 Lg -1 min -1 catalyst while the hydrogen production rate of activated carbon supported Co-Cr-B catalyst was found as 30.2 Lg -1 min -1 catalyst . In presence of activated carbon-supported Co-Cr-B catalyst, the hdyrolysis kinetic order and activation energy of NaBH 4 were found as 0.126 and 16.27 kJ/mol, respectively. The results suggest that activated carbon-supported Co-Cr-B catalysts can be used for mobile applications of Proton exchange membrane fuel cell (PEMFCs) systems.

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Improved hydrogen generation from alkaline NaBH4 solution using cobalt catalysts supported on modified activated carbon

Cited by 74 publications

References 28 publications

Catalytic behavior of carbon supported Ni–B, Co–B and Co–Ni–B in hydrogen generation by hydrolysis of KBH4

Catalytic behavior of carbon supported Ni–B, Co–B and Co–Ni–B in hydrogen generation by hydrolysis of KBH4

Synthesis of graphene-based Co-B catalyst via simultaneous chemical reduction for hydrolysis of sodium borohydride

Investigation of High-Activity Activated Carbon-Supported Co-Cr-B Catalyst in the Generation of Hydrogen from Hydrolysis of Sodium Borohydride

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