Enhanced Thermal Dehydrogenation of Ammonia Borane by <scp>d</scp>-Mannitol

Kim, Geo Jong; Boone, Alisha M.; Chesnut, M. Dathan; Shin, Jung Hun; Jung, Jihoon; Hwang, Hyun Tae

doi:10.1021/acs.iecr.9b05343

Cited by 11 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…D-mannitol (DM, C 6 H 8 (OH) 6 ) was demonstrated to be an effective additive to enhance the dehydrogenation properties of NH 3 BH 3 . The onset dehydrogenation temperature of NH 3 BH 3 was found to be decreased to 80 °C with the additive of DM …”

Section: Aminoboranenh3bh3mentioning

confidence: 99%

See 1 more Smart Citation

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Huang

Cheng

Zhang

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Hydrogen is one of the cleanest energies with potential to have zero carbon emission. Hydrogen storage is a challenging phase for the hydrogen energy application. The safety, cost, and transportation of compressed and liquified hydrogen hinder the widespread application of hydrogen energy. Chemical absorption of hydrogen in solid hydrogen storage materials is a promising hydrogen storage method due to its high storage and transportation performance. Hydrogen storage density, dehydrogenation temperature, and dehydrogenation dynamics are the main challenges for the hydrogen storage materials. The ultimate goal of the system gravimetric capacity was set by the Department of Energy to be 6.5 wt % with a working temperature from −40 to 60 °C. The theoretical densities of most present hydrogen storage materials are even lower than 6.5 wt %, which make it impossible to reach the system gravimetric capacity goal. Only hydrogen storage materials with high theoretical density (≥10 wt %) with further modification have the possibility to reach the goal. However, most of the reviews focus on the research progress of general hydrogen storage materials investigated, many of which have low density. Hydrogen storage materials with high theoretical density including metal borohydrides, metal alanates, ammonia borane, metal amides, and amine metal borohydrides have been reviewed in this article. The pyrolysis and hydrogen absorption conditions of the hydrogen storage materials have been summarized, especially the improvements of the hydrogen storage materials. Furthermore, the challenges of the hydrogen storage materials have been pointed out. Potential hydrogen storage materials and possible modification methods have also been presented and discussed.

show abstract

Section: Aminoboranenh3bh3mentioning

confidence: 99%

“…The onset dehydro-genation temperature of NH 3 BH 3 was found to be decreased to 80 °C with the additive of DM. 269 4.3.4. Size Effects.…”

Section: Enhancements Of Hydrogenmentioning

confidence: 99%

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Huang

Cheng

Zhang

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Many promising solutions including high-pressure/cryogenic-liquid storage, adsorptive storage on high-surface-area adsorbents, and chemical hydrogen storage have been proposed to address the storage problem. − Among these solutions, chemical hydrogen storage in complex hydrides, especially amine boranes, have come into prominence in recent years . In this category, ammonia borane (H 3 NBH 3 , abbreviated as AB hereafter) arises as one of the best candidates because of its high gravimetric hydrogen content (19.6%), nontoxicity, stability, and relatively safe storage under ambient conditions. , However, because AB is a highly stable compound, either high temperature or a suitable catalyst is required to release hydrogen stored in AB in the solid state or solution, respectively. , In the presence of a suitable catalyst, the dehydrogenation of AB in water results in the generation of 3 equiv. of H 2 gas according to the chemical equation shown below (eq ).…”

Section: Introductionmentioning

confidence: 99%

“…9,10 However, because AB is a highly stable compound, either high temperature or a suitable catalyst is required to release hydrogen stored in AB in the solid state or solution, respectively. 11,12 In the presence of a suitable catalyst, the dehydrogenation of AB in water results in the generation of 3 equiv. of H 2 gas according to the chemical equation shown below (eq 1).…”

Section: Introductionmentioning

confidence: 99%

Pt Nanoparticles Supported on Mesoporous Graphitic Carbon Nitride as Catalysts for Hydrolytic Dehydrogenation of Ammonia Borane

Aksoy

Metin

2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Platinum (Pt) nanoparticles (NPs) supported on mesoporous graphitic carbon nitride (mpg-CN/Pt) were synthesized in situ via the reduction of as-prepared mpg-CN/Pt(IV) composites during the catalytic hydrolysis of ammonia-borane (AB) under the white-light irradiation. The yielded mpg-CN/Pt nanocatalysts were characterized by using many advanced analytical techniques including TEM, XRD, ICP-MS, XPS, FTIR, PL, and time-resolved emission spectroscopy (TRES) techniques. Besides the privilege advantageous of the presented in situ synthesis protocol for the synthesis of mpg-CN/Pt nanocatalysts, formation of the heterojunction between in situ generated Pt NPs and visible-light active semiconductor mpg-CN enables an improved charge separation and prolonged lifetime, resulting in 2.25-fold enhanced photocatalytic activity within the hydrolysis of AB under white-light irradiation. The effect of Pt loading on the catalytic activity of mpg-CN/Pt nanocatalysts was examined in the hydrolysis of AB and the highest turnover frequency (TOF) of 274.2 min −1 was obtained with 5.94 wt % Pt-loaded mpg-CN/Pt nanocatalysts, which is the one of the best TOFs among monometallic Pt-based nanocatalysts and comparable to the ones reported using bimetallic Pt nanocatalysts. Moreover, mpg-CN/Pt nanocatalysts were found to be highly durable in the hydrolysis of AB such that it preserves 78% of its initial catalytic activity after the 10th consecutive runs, which is one of the highest reusability performances among all Pt-based catalysts that have been tested in the hydrolysis of AB so far. Upon the results of the kinetic studies, the rate law and activation parameters for the mpg-CN/Ptcatalyzed AB hydrolysis were also reported. This work demonstrates for the first time that mpg-CN is a proper support material for the in situ synthesis of catalytically active yet stable Pt NPs promoting the photocatalytic hydrogen evolution from the hydrolysis of AB.

show abstract

“…Various methods include chemical intercalation, [5,6] thermal or chemical reduction of GO, [7] epitaxial growth, [8] mechanical or ultrasonic exfoliation, [9] electric arc discharge, [10] chemical vapor deposition, [11] and microwave plasma-enhanced chemical vapor deposition. [12] The as-synthesized graphene with required fabrication is found to have innumerable applications in the areas of photocatalysis, [13,14] catalysis, [15] Li-ion batteries, [16,17] Ni-and Zn-ion batteries, [18] supercapacitors, [19,20] solar cells, [21,22] photovoltaic cells, [23] biosensors, [24,25] fuel cells, [26,27] heavy metals removal, [28] etc. Of all the reported methods and methodologies, the chemical reduction of GO is most widely employed as it is aids in bulk synthesis and highly cost-effective.…”

Section: Introductionmentioning

confidence: 99%

A Novel Strategy for Sustainable Synthesis of Soluble‐Graphene by a Herb Delphinium denudatum Root Extract for Use as Light‐Weight Supercapacitors

et al. 2020

View full text Add to dashboard Cite

Synthesis of high‐quality graphene nanosheets under eco‐friendly strategies is of enormous interest today hence graphene‐based materials offer unique advantages in a wide range of applications including light‐weight supercapacitors. The reduction of graphene oxide (GO) by chemical reagents frequently involves hazardous reductants that are also dangerous to humans. In view of sustainability, we develop a facile and green procedure to synthesize soluble‐graphene by reducing the GO in delphinium root extraction for the first time. The reducing property of organic compounds that exist in the aqueous delphinium root extract may be accountable for the reduction of exfoliated GO to D‐graphene under reflux condition. The efficient elimination of oxygen functionalities from GO was verified by powder X‐ray diffraction (PXRD), UV‐Visible spectroscopy (UV‐Vis), Fourier transform infrared (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) studies. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) studies indicate the successful development of few‐layer graphene. The electrochemical activities are delivered by cyclic voltammetry (CV) and galvanic charge‐discharge (GCD) studies. This uniquely‐synthesized D‐graphene electrode offers superior electrochemical performance at 2 A g−1 with an utmost specific capacitance (Cs) of 158 F g−1 and high energy density (E) of 22 Wh Kg−1. Taking the above remarkable results, the characteristics of eco‐friendly, easy synthesis and cheap endow this green approach as a promising avenue for the exploitation of graphene‐based materials in numerous applications, particularly for graphene‐based light‐weight supercapacitors.

show abstract

Enhanced Thermal Dehydrogenation of Ammonia Borane by d-Mannitol

Cited by 11 publications

References 26 publications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Pt Nanoparticles Supported on Mesoporous Graphitic Carbon Nitride as Catalysts for Hydrolytic Dehydrogenation of Ammonia Borane

A Novel Strategy for Sustainable Synthesis of Soluble‐Graphene by a Herb Delphinium denudatum Root Extract for Use as Light‐Weight Supercapacitors

Contact Info

Product

Resources

About