A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang, Liuzhang; Zhong, Hao; Li, Haiwen; Zhu, Min

doi:10.3390/inorganics6010010

Cited by 52 publications

(34 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At last, NaBH 4 can produce more hydrogen per mass amount than AB, and also NaBH 4 is cheaper than AB. It is also hoped that progress will rapidly involve regeneration of NaBH 4 from sodium borate are shown by very recent reports ,…”

Section: Discussionmentioning

confidence: 99%

Efficient “Click”‐Dendrimer‐Supported Synergistic Bimetallic Nanocatalysis for Hydrogen Evolution by Sodium Borohydride Hydrolysis

et al. 2019

View full text Add to dashboard Cite

Hydrogen is efficiently generated upon "click" dendrimersupported catalysis of NaBH 4 hydrolysis by a series mono-and bimetallic nanoparticles (NPs) of the late transition metals. Among the monometallic NPs, PtNPs show the best performances, Co being the best first-raw transition metal. A remarkable synergy between Pt and Co in Pt/CoNP@dendrimer is also disclosed, compared with various other bimetallic NP catalysts, achieving a TOF of 303 mol H2 · mol catal.À 1 · min À 1 when the ratio of Pt to Co is 1 : 1. In the presence of NaOH, the catalytic activity is boosted for all monometallic NPs except PtNPs, but NaOH exerted a negative influence on the bimetallic NP catalysts. The kinetic studies with the catalyst Pt 1 Co 1 NP@dendrimer involve in particular a primary kinetic isotope effect k D /k H = 3.41 obtained for the hydrolysis reaction with D 2 O, suggesting that OÀ H bond cleavage of water is involved in the rate-determining step, and an overall reaction mechanism is proposed.

show abstract

Section: Discussionmentioning

confidence: 99%

Efficient “Click”‐Dendrimer‐Supported Synergistic Bimetallic Nanocatalysis for Hydrogen Evolution by Sodium Borohydride Hydrolysis

et al. 2019

View full text Add to dashboard Cite

show abstract

“…It is worth mentioning that regeneration of NaBH 4 starting from NaBO 2 has been demonstrated, but the processes developed so far need to be further improved to make one/few of them cost-effective. 77 Another challenge, with these processes, will be to develop them while the cycle of each reactant and product is neutral. Otherwise, the scheme of the recycling process could be considered differently for the third part, at room temperature and atmospheric pressure was found to lead to NaBH 4 back with a yield as high as 90%.…”

Section: Toward a Neutral Cycle With Nabhmentioning

confidence: 99%

Closing the hydrogen cycle with the couple sodium borohydride‐methanol, via the formation of sodium tetramethoxyborate and sodium metaborate

et al. 2020

View full text Add to dashboard Cite

Methanolysis of sodium borohydride (NaBH 4) is one of the methods efficient enough to release, on demand, the hydrogen stored in the hydride as well as in 4 equiv of methanol (CH 3 OH). It is generally reported that, in methanolysis, sodium tetramethoxyborate (NaB(OCH 3) 4) forms as single component of the spent fuel. It is, however, necessary to clearly investigate some critical aspects related to it. We first focused on the methanolysis reaction where NaBH 4 was reacted with 2, 4, 8, 16, or 32 equiv of CH 3 OH. With 2 equiv of CH 3 OH, the conversion of NaBH 4 is not complete. With 4 to 32 equiv of CH 3 OH, NaBH 4 is totally methanolized (conversion of 100%). The best conditions are those involving 4 equiv of CH 3 OH as they offer the highest effective gravimetric hydrogen storage capacity with 4.8 wt%, an attractive H 2 generation rate with 331 mL(H 2) min −1-a performance achieved without any catalyst-and the formation of NaB(OCH 3) 4 as single product as identified by X-ray diffraction, Fourier transform infrared spectroscopy, and nuclear magnetic resonance. We then focused on the transformation of this product NaB(OCH 3) 4 into sodium metaborate (NaBO 2), via the formation of sodium tetrahydroxyborate (NaB (OH) 4). NaB(OCH 3) 4 is easily transformed in water, by hydrolysis, at 80 C and for 90 minutes, into NaB(OH) 4 and 4 equiv of CH 3 OH. In doing so, the cycle with CH 3 OH is closed. Subsequently, NaB(OH) 4 is recovered and converted into NaBO 2 under heating at 500 C. This reaction liberates 4 equiv of H 2 O, which allows to close the cycle with water. Based on these achievements, we have finally proposed a triangular recycling scheme aiming at closing the cycle with the protic reactants of the aforementioned reactions. This scheme may be used as base for implementing a closed cycle with the couple NaBH 4-CH 3 OH.

show abstract

“…However, the viability of borohydride dehydrogenation by hydrolysis is fundamentally limited by the irreversibility of the hydrolysis reaction [19][20][21]. In the NaBH 4 system, the hydrated sodium borate (NaBO 2 ) by-product can be regenerated to borohydride by annealing with magnesium hydride MgH 2 under high H 2 back-pressure (0.1-7 MPa) [22].…”

Section: Metal Borohydrides For Hydrogen Storagementioning

confidence: 99%

Properties and Applications of Metal (M) dodecahydro-closo-dodecaborates (Mn=1,2B12H12) and Their Implications for Reversible Hydrogen Storage in the Borohydrides

Grahame

Aguey‐Zinsou

2018

Inorganics

View full text Add to dashboard Cite

Hydrogen has long been proposed as a versatile energy carrier that could facilitate a sustainable energy future. For an energy economy centred around hydrogen to function, a storage method is required that is optimised for both portable and stationary applications and is compatible with existing hydrogen technologies. Storage by chemisorption in borohydride species emerges as a promising option because of the advantages of solid-state storage and the unmatched hydrogen energy densities that borohydrides attain. One of the most nuanced challenges limiting the feasibility of borohydride hydrogen storage is the irreversibility of their hydrogen storage reactions. This irreversibility has been partially attributed to the formation of stable dodecahydro-closo-dodecaborates (M n=1,2 B 12 H 12 ) during the desorption of hydrogen. These dodecaborates have an interesting set of properties that are problematic in the context of borohydride decomposition but suggest a variety of useful applications when considered independently. In this review, dodecaborates are explored within the borohydride thermolysis system and beyond to present a holistic discussion of the most important roles of the dodecaborates in modern chemistry.

show abstract

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Cited by 52 publications

References 82 publications

Efficient “Click”‐Dendrimer‐Supported Synergistic Bimetallic Nanocatalysis for Hydrogen Evolution by Sodium Borohydride Hydrolysis

Efficient “Click”‐Dendrimer‐Supported Synergistic Bimetallic Nanocatalysis for Hydrogen Evolution by Sodium Borohydride Hydrolysis

Closing the hydrogen cycle with the couple sodium borohydride‐methanol, via the formation of sodium tetramethoxyborate and sodium metaborate

Properties and Applications of Metal (M) dodecahydro-closo-dodecaborates (Mn=1,2B12H12) and Their Implications for Reversible Hydrogen Storage in the Borohydrides

Contact Info

Product

Resources

About