Effect of boric acid on thermal dehydrogenation of ammonia borane: Mechanistic studies

2013 ◽  
Vol 38 (4) ◽  
pp. 1925-1931 ◽  
Author(s):  
Hyun Tae Hwang ◽  
Arvind Varma
Keyword(s):  
Boric Acid ◽  
Ammonia Borane ◽  
Mechanistic Studies ◽  
Thermal Dehydrogenation

Effect of boric acid on thermal dehydrogenation of ammonia borane: H2yield and process characteristics

AIChE Journal ◽  
2013 ◽  
Vol 59 (9) ◽  
pp. 3359-3364 ◽  
Author(s):  
Hyun Tae Hwang ◽  
Patrick Greenan ◽  
Seung Jin Kim ◽  
Arvind Varma
Keyword(s):  
Boric Acid ◽  
Ammonia Borane ◽  
Process Characteristics ◽  
Thermal Dehydrogenation

Preparation, Structure and Thermolysis Characteristics of Ammonia Borane

2016 ◽  
Vol 680 ◽  
pp. 529-533
Author(s):  
Jian Li Ma ◽  
Hai Yan Cao ◽  
Xiao Xia Zhang ◽  
Dong Chen
Keyword(s):  
Boric Acid ◽  
Storage System ◽  
Ammonia Borane ◽  
Mass Ratio ◽  
Hydrogen Storage System ◽  
Ammonia Complex ◽  
Ft Ir ◽  
Ammonia Source ◽  
Boron Source ◽  
Amino Complex

Ammonia borane (NH3BH3, AB) is an excellent source of hydrogen(19.6 wt %) for fuel cell applications. In this paper, pure ammonia borane is successfully prepared by using amino complex for ammonia complex Ag(NH3)2Cl as new ammonia source, and sodium borohydride (NaBH4) as boron source. The composition and constitution of the products are measured by XRD and FT-IR. The thermolysis of ammonia borane is significant for its practical application. Boric acid plays a role in improving ammonia borane hydrogen performance. The effects of different mass ratio of boric acid and ammonia borane on dehydrogenation are tested by XRD, TG/DTA and TPD-MS. The results show that boric acid can decrease the first level dehydrogenation temperature of ammonia borane decrease to about 85°C (working temperature of PEMFC). What’s more, the onset temperature of AB’s thermolysis can decrease to about 60°C when the mass ratio of ammonia borane and boric acid is equal to 3:1. This makes ammonia borane be more suitable for the application in on-board hydrogen storage system.

Mechanistic studies of ammonia borane dehydrogenation

2013 ◽  
Vol 38 (1) ◽  
pp. 169-179 ◽  
Author(s):  
Ahmad Al-Kukhun ◽  
Hyun Tae Hwang ◽  
Arvind Varma
Keyword(s):  
Ammonia Borane ◽  
Mechanistic Studies

Encapsulation of Ammonia Borane in Pd/Halloysite Nanotubes for Efficient Thermal Dehydrogenation

2020 ◽  
Vol 8 (5) ◽  
pp. 2122-2129 ◽  
Author(s):  
Yanan Feng ◽  
Xiaopeng Zhou ◽  
Jing-he Yang ◽  
Xiangyang Gao ◽  
Linxin Yin ◽  
...  
Keyword(s):  
Ammonia Borane ◽  
Halloysite Nanotubes ◽  
Thermal Dehydrogenation

Enhancing the thermal dehydrogenation properties of ammonia borane (AB) by using monodisperse MnO2 hollow spheres (MHS)

2019 ◽  
Vol 781 ◽  
pp. 111-117 ◽  
Author(s):  
Zaixing Yang ◽  
Hong Sun ◽  
Hongren Li ◽  
Feng Li ◽  
Huang Qijing ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Ammonia Borane ◽  
Thermal Dehydrogenation

Exploring the homopolar dehydrocoupling of ammonia borane by solid-state multinuclear NMR spectroscopy

2021 ◽  
Vol 57 (15) ◽  
pp. 1887-1890
Author(s):  
Binayak Roy ◽  
Urbi Pal ◽  
Ankita Bishnoi ◽  
Luke A. O'Dell ◽  
Pratibha Sharma
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Hydrogen Storage ◽  
Ammonia Borane ◽  
Multinuclear Nmr ◽  
Multinuclear Nmr Spectroscopy ◽  
Thermal Dehydrogenation

Solid-state 1H–14NOT HMQC, 11B MQMAS and 1H–11B HETCOR NMR experiments are used to explore the role of homopolar B–B interaction in the thermal dehydrogenation of pure and supported ammonia borane, for it's potential hydrogen storage applications.

Improved thermal dehydrogenation of ammonia borane by MOF-5

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10746-10750 ◽  
Author(s):  
Zhongyue Li ◽  
Wei Liu ◽  
Huijuan Yang ◽  
Tai Sun ◽  
Kun Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Ammonia Borane ◽  
Thermal Dehydrogenation

TPD-MS spectra (left) and solid-state 11B NMR (right) of pristine AB, AB/MOF-5 and AB/JUC-32-Y.

Enhanced Thermal Dehydrogenation of Ammonia Borane by d-Mannitol

2019 ◽  
Vol 59 (2) ◽  
pp. 620-626 ◽  
Author(s):  
Geo Jong Kim ◽  
Alisha M. Boone ◽  
Michael Chesnut ◽  
Jung Hun Shin ◽  
Jihoon Jung ◽  
...  
Keyword(s):  
Ammonia Borane ◽  
Thermal Dehydrogenation

Nickel-catalyzed oxidative cross-coupling of arylboronic acids with olefins

2014 ◽  
Vol 86 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Dong Liu ◽  
Chao Liu ◽  
Aiwen Lei
Keyword(s):  
High Temperature ◽  
Boric Acid ◽  
Cross Coupling ◽  
Mechanistic Studies ◽  
Arylboronic Acids ◽  
Reaction Proceeds ◽  
Efficient Coupling ◽  
Styrene Derivatives ◽  
Acid Esters

Abstract A novel and efficient nickel-catalyzed oxidative cross-coupling of arylboronic acids with olefins to synthesize 1,2-diarylalkenes has been developed. By employing Ni(acac)2 as the catalyst, TEMPO (2,2,6,6-tetramethylpiperidine 1-oxyl) as the oxidant, a variety of arylboronic acids and styrene derivatives could be cross-coupled efficiently to afford the corresponding 1,2-diarylalkenes in moderate-to-good yields. Notably, high E-selectivity of 1,2-diarylalkenes was obtained with the aid of a high temperature of 120°C. Moreover, boric acid esters also proved to be efficient coupling partners. Initial mechanistic studies suggest that this reaction proceeds through a radical pathway.

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