Cobalt boride catalysts for hydrogen generation from alkaline NaBH4 solution

Wu, Chuan; Wu, Feng; Bai, Ying; Yi, Baolian; Zhang, Huamin

doi:10.1016/j.matlet.2005.01.058

Cited by 221 publications

(99 citation statements)

References 11 publications

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“…Activation energy for catalysed hydrolysis reaction calculated from Arrhenius plot was found to be 40.2 kJ mol −1 . The obtained activation energy is less than the reported 65-69 kJ mol −1 for unsupported powder Co-B catalyst [35,36].…”

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

confidence: 64%

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/alpocontrasting

confidence: 64%

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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“…The catalytic effect of cobalt borides has been reported in other hydrogen-related reactions [36][37][38]. For instance, metallic Co and metallic-like Co 2 B were reported to decrease remarkably the dehydrogenation temperature in the LiBH 4 /LiNH 2 system [36].…”

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

“…For instance, metallic Co and metallic-like Co 2 B were reported to decrease remarkably the dehydrogenation temperature in the LiBH 4 /LiNH 2 system [36]. Nanocrystalline Co 2 B was also found to act as an efficient catalyst for hydrogen production from the hydrolysis of NaBH 4 and in the field of electrochemical water splitting [36,38]. This is different from the result in the present study, where 11 B MAS NMR results suggest that the active catalytic species must be nonmetallic and nonmagnetic with a composition close to CoB (1:1 in molar ratio).…”

Section: Discussionmentioning

confidence: 99%

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Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

et al. 2018

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Li 2 B 12 H 12 is commonly considered as a boron sink hindering the reversible hydrogen sorption of LiBH 4 . Recently, in the dehydrogenation process of LiBH 4 an amorphous H-deficient Li 2 B 12 H 12−x phase was observed. In the present study, we investigate the rehydrogenation properties of Li 2 B 12 H 12−x to form LiBH 4 . With addition of nanostructured cobalt boride in a 1:1 mass ratio, the rehydrogenation properties of Li 2 B 12 H 12−x are improved, where LiBH 4 forms under milder conditions (e.g., 400 • C, 100 bar H 2 ) with a yield of 68%. The active catalytic species in the reversible sorption reaction is suggested to be nonmetallic Co x B (x = 1) based on 11 B MAS NMR experiments and its role has been discussed.

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“…Co catalyst was found to be effective in reducing the kinetic barrier of dehydrogenation of borohydrides, 18,19 so that Co was doped into the sample through energetic ball milling. In this case, our volumetric release measurement shows that obvious hydrogen evolution took place at ca.…”

mentioning

confidence: 99%

Releasing 17.8 wt% H2 from lithium borohydride ammoniate

Zheng

et al. 2011

Energy Environ. Sci.

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Cobalt boride catalysts for hydrogen generation from alkaline NaBH4 solution

Cited by 221 publications

References 11 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

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Releasing 17.8 wt% H2 from lithium borohydride ammoniate

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Cobalt boride catalysts for hydrogen generation from alkaline NaBH4 solution

Cited by 221 publications

References 11 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

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Releasing 17.8 wt% H2 from lithium borohydride ammoniate

Contact Info

Product

Resources

About

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