Effect of Co+2/BH4− ratio in the synthesis of Co–B catalysts on sodium borohydride hydrolysis

Manna, Joydev; Roy, Binayak; Vashistha, M.; Sharma, Pratibha

doi:10.1016/j.ijhydene.2013.10.018

Cited by 51 publications

(18 citation statements)

References 22 publications

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“…Similar observation is reported in literature for Co and Ni based catalysts [30]. It has been suggested that at higher pH, desorption of B(OH) − 4 from the surface of catalysts increases and consequently renewal of the active site for hydrolysis reactions enhanced [11].…”

Section: Hydrolysis Of Nabh 4 In the Presence Of Co-b/alposupporting

confidence: 89%

“…XRD pattern of bentonite matches with the JCPDS reference code 00-003-0019 of sodium aluminium silicate hydroxide hydrate. After Co-B loading onto the bentonite surface, peaks correspond to bentonite diffraction pattern is overshadowed by Co-B amorphous broad peak [11].…”

Section: Characterization Of Co-b/bentonitementioning

confidence: 99%

“…Hydrolysis tests were performed in a three neck round bottom (RB) flask reactor and the hydrogen release was measured by water displacement method [11]. The reactor was kept inside a water bath to maintain the reaction temperature within ±1 °C range of the set value.…”

Section: Hydrolysis Testmentioning

confidence: 99%

“…It is a general practice to use alkaline stabilized NaBH 4 solution as feed stock for hydrogen generation [11]. Otherwise fuel loss will occur due to the self-hydrolysis of NaBH 4 in the presence of water.…”

Section: Hydrolysis Of Nabh 4 In the Presence Of Co-b/alpomentioning

confidence: 99%

“…Cobalt-based catalysts, especially cobalt boride alloy (Co-B), have potential catalytic activity to replace noble metals in NaBH 4 hydrolysis [9,10]. Co-B catalysts can easily be synthesized by reduction of cobalt(II) salts but it has been observed that formed Co-B particles always prefer to be in agglomerated state due to high surface energy involved in the exothermic reduction process [11]. The agglomeration causes the surface area to decrease which in turn compromises the catalytic activity of the Co-B catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Manna

Roy

Pareek

et al. 2017

Catalysis, Structure & Reactivity

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Aluminium phosphate and bentonite supported Co-B catalyst were synthesized via two step impregnation-reduction method for sodium borohydride hydrolysis. The synthesized catalysts were characterized by XRD, FTIR, XPS, FE-SEM, FE-TEM, BET, ICP-AES techniques and tested for NaBH 4 hydrolysis reaction. The results demonstrated that the synthesized supported Co-B catalysts greatly facilitate the NaBH 4 hydrolysis reaction. Highest hydrolysis rate observed for Co-B/AlPO 4 and Co-B/bentonite catalysts are 6.50 and 3.91 L min −1 g −1 , respectively, with 2 wt% NaBH 4 , 5 wt% NaOH solution at 30 °C. The hydrogen generation rate was found to increase with experimental temperature. Activation energy for the hydrolysis reaction was observed to be 37 and 40.2 kJ mol −1 for Co-B/AlPO 4 and Co-B/bentonite catalysts, respectively.

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Section: Hydrolysis Of Nabh 4 In the Presence Of Co-b/alposupporting

confidence: 89%

Section: Characterization Of Co-b/bentonitementioning

confidence: 99%

Section: Hydrolysis Testmentioning

confidence: 99%

Section: Hydrolysis Of Nabh 4 In the Presence Of Co-b/alpomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Manna

Roy

Pareek

et al. 2017

Catalysis, Structure & Reactivity

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Hydrogenation of dibenzyltoluene and the catalytic performance of Pt/ Al ₂ O ₃ with various Pt loadings for hydrogen production from perhydro‐dibenzyltoluene

Ali

Rohini

Noh

et al. 2021

Intl J of Energy Research

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Heterogeneous and homogenous catalysts for hydrogen generation by hydrolysis of aqueous sodium borohydride (NaBH₄) solutions

Brack

Dann

Wijayantha

2015

Energy Science & Engineering

233

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It is clear that in order to satisfy global energy demands whilst maintaining sustainable levels of atmospheric greenhouse gases, alternative energy sources are required. Due to its high chemical energy density and the benign by-product of its combustion reactions, hydrogen is one of the most promising of these. However, methods of hydrogen storage such as gas compression or liquefaction are not suitable for portable or automotive applications due to their low hydrogen storage densities. Accordingly, much research activity has been focused on finding higher density hydrogen storage methods. One such method is to generate hydrogen via the hydrolysis of aqueous sodium borohydride (NaBH 4 ) solutions, and this has been heavily studied since the turn of the century due to its high theoretical hydrogen storage capacity (10.8 wt%) and relatively safe operation in comparison to other chemical hydrides. This makes it very attractive for use as a hydrogen generator, in particular for portable applications. Major factors affecting the hydrolysis reaction of aqueous NaBH 4 include the performance of the catalyst, reaction temperature, NaBH 4 concentration, stabilizer concentration, and the volume of the reaction solution. Catalysts based on noble metals, in particular ruthenium (Ru) and platinum (Pt), have been shown to be particularly efficient at rapid generation of hydrogen from aqueous NaBH 4 solutions. However, given the scarcity and expense of such metals, a transition metal-based catalyst would be a desirable alternative, and thus much work has been conducted using cobalt (Co) and nickel (Ni)-based materials to attempt to source a practical option. "Metal free" NaBH 4 hydrolysis can also be achieved by the addition of aqueous acids such as hydrochloric acid (HCl) to solid NaBH 4 . This review summarizes the various catalysts which have been reported in the literature for the hydrolysis of NaBH 4 .

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Effect of Co+2/BH4− ratio in the synthesis of Co–B catalysts on sodium borohydride hydrolysis

Cited by 51 publications

References 22 publications

Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Hydrogenation of dibenzyltoluene and the catalytic performance of Pt/ Al ₂ O ₃ with various Pt loadings for hydrogen production from perhydro‐dibenzyltoluene

Heterogeneous and homogenous catalysts for hydrogen generation by hydrolysis of aqueous sodium borohydride (NaBH₄) solutions

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Effect of Co+2/BH4− ratio in the synthesis of Co–B catalysts on sodium borohydride hydrolysis

Cited by 51 publications

References 22 publications

Hydrogen generation from NaBH4 hydrolysis using Co-B/AlPO4 and Co-B/bentonite catalysts

Hydrogen generation from NaBH4 hydrolysis using Co-B/AlPO4 and Co-B/bentonite catalysts

Hydrogenation of dibenzyltoluene and the catalytic performance of Pt/ Al 2 O 3 with various Pt loadings for hydrogen production from perhydro‐dibenzyltoluene

Heterogeneous and homogenous catalysts for hydrogen generation by hydrolysis of aqueous sodium borohydride (NaBH4) solutions

Contact Info

Product

Resources

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Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Hydrogen generation from NaBH₄ hydrolysis using Co-B/AlPO₄ and Co-B/bentonite catalysts

Hydrogenation of dibenzyltoluene and the catalytic performance of Pt/ Al ₂ O ₃ with various Pt loadings for hydrogen production from perhydro‐dibenzyltoluene

Heterogeneous and homogenous catalysts for hydrogen generation by hydrolysis of aqueous sodium borohydride (NaBH₄) solutions