One-Pot Synthesis of Ammonia–Borane and Trialkylamine–Boranes from Trimethyl Borate

Ramachandran, P. Veeraraghavan; Raju, B. China; Gagare, Pravin D.

doi:10.1021/ol302421t

Cited by 37 publications

(11 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the recycling of reductants to lithium aluminum hydride is still a big challenge for industrial application. Their later work demonstrated that trimethoxyborane (B(OMe) 3 ), which can be produced by the reaction of NH 4 ·BO 2 (the byproduct of AB hydrolysis) with H 2 O and methanol (eqs and ), could be reconverted to AB using a similar strategy (Figure b). , Therefore, the regeneration of AB from hydrolytic byproducts requires more energy than that from the methanolytic ones. It should be noted that AB and sodium borohydride (SB) share borates as the spent fuel, and SB can be employed as the starting material for regenerating AB .…”

Section: Regeneration Of Abmentioning

confidence: 99%

Dehydrogenation of Ammonia Borane by Metal Nanoparticle Catalysts

2016

View full text Add to dashboard Cite

Ammonia borane (AB), having a high hydrogen density of 19.6 wt %, has attracted much attention as a promising chemical hydrogen storage material. In the past few years, a number of highly active metal nanoparticle (NP) catalysts, which are easy to handle and separate, have been developed for AB dehydrogenation. In this Perspective, we summarize new progress in the development of metal NP catalysts, which are categorized into monometallic and heterometallic catalysts, with excellent activity and high recyclability for different AB dehydrogenation pathways, including solvolysis (hydrolysis and methanolysis) in protic solvents and dehydrocoupling in nonprotic solvents, and we survey the corresponding methods for the regeneration of AB. Moreover, the merits and drawbacks of solvolysis and dehydrocoupling are discussed.

show abstract

Section: Regeneration Of Abmentioning

confidence: 99%

Dehydrogenation of Ammonia Borane by Metal Nanoparticle Catalysts

2016

View full text Add to dashboard Cite

show abstract

“…Ammonia borane (AB) is one of the chemical storage forms of hydrogen with high stability and a high hydrogen content of 19.6 wt %. Experimentally, the synthesis of AB with a yield rate of more than 88% and purity higher than 98% has been achieved in recent years. − AB is a solid crystal and the solubility of AB is 33.6 g/(100 g water) at room temperature . Usually, a thermolysis or hydrolysis process is adopted to release the stored hydrogen in AB molecules.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of Ammonia Borane on a Single Pt Atom Supported by N-Doped Graphene

Gong

Sheng

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The hydrolysis of ammonia borane (NH 3 BH 3 or AB) at room temperature is a promising method to produce hydrogen, but the complete reaction mechanism is still less investigated. Herein, the full hydrolysis process of the AB molecule on single Pt atom coordinated by two carbon atoms and one nitrogen atom (Pt 1 −C 2 N 1 ) on nitrogen doped graphene is investigated using the density functional theory (DFT) method. Our results demonstrate that the rate-limiting step is the formation of *BH 2 NH 3 by breaking the first B−H bond in AB with an energy barrier of 0.68 eV, implying that Pt 1 −C 2 N 1 is a potential room-temperature catalyst for the full hydrolysis of AB. In addition, 27 more types of M 1 −C 2 N 1 (M represents transiton metal atom) and Pt 1 supported on nitrogen-doped graphene with different local coordination environments (Pt 1 −C x N y , x and y are the number of carbon and nitrogen atoms that coordinated with the platinum atom) are considered to screen out potential single-atom catalysts for AB hydrolysis. The screening results further show that Pt 1 −C 1 N 2 is another potential catalyst for AB hydrolysis. In particular, two hydrogen atoms precovered on Pt 1 −C 1 N 2 , resulting in a lower energy barrier for the rate-limiting step than that on Pt 1 −C 2 N 1 . This study provides a prototype of Pt 1 −C 1 N 2 and Pt 1 −C 2 N 1 for catalytic full hydrolysis of AB at room temperature.

show abstract

“…To access the polymers,anAA/BB type polycondensation strategy was selected (Figure 1), using simple bisboronic acids or esters and diammonium chlorides as difunctional monomers,s tarting from ah eterogenous suspension of insoluble starting materials in THF. [9] This approach is versatile and uses readily accessible building blocks. [10] However it requires ap recise stoichiometry to achieve high molar masses.…”

mentioning

confidence: 99%

“…Thep olymerization relies on the formation of the key Lewis pairs.W ec hose to develop as imple,i deally one-step, synthetic route. [9] Thereaction had to be 100 %selective and quantitative for an efficient polycondensation. Thea cid/base reaction of borohydrides and ammonium salts releases dihydrogen gas as as ide-product.…”

mentioning

confidence: 99%

Polyboramines for Hydrogen Release: Polymers Containing Lewis Pairs in their Backbone

et al. 2015

View full text Add to dashboard Cite

The one-step polycondensation of diamines and diboranes triggered by the in situ deprotonation of the diammonium salts and concomitant reduction of bisboronic acids leads to the assembly of polymer chains through multiple Lewis pairing in their backbone. These new polyboramines are dihydrogen reservoirs that can be used for the hydrogenation of imines and carbonyl compounds. They also display a unique dihydrogen thermal release profile that is a direct consequence of the insertion of the amine-borane linkages in the polymeric backbone.

show abstract

One-Pot Synthesis of Ammonia–Borane and Trialkylamine–Boranes from Trimethyl Borate

Cited by 37 publications

References 45 publications

Dehydrogenation of Ammonia Borane by Metal Nanoparticle Catalysts

Dehydrogenation of Ammonia Borane by Metal Nanoparticle Catalysts

Hydrolysis of Ammonia Borane on a Single Pt Atom Supported by N-Doped Graphene

Polyboramines for Hydrogen Release: Polymers Containing Lewis Pairs in their Backbone

Contact Info

Product

Resources

About