scholarly journals An Electrochemical Ethylamine/Acetonitrile Redox Method for Ambient Hydrogen Storage

2021 ◽  
Author(s):  
Dezhen Wu ◽  
Jialu Li ◽  
Libo Yao ◽  
Rongxuan Xie ◽  
Zhenmeng Peng
Keyword(s):  
Hydrogen Storage ◽  
Redox Reactions ◽  
Storage Capacity ◽  
Department Of Energy ◽  
Oxidation Reactions ◽  
Ambient Conditions ◽  
Redox Method ◽  
Pt Black ◽  
Fast Rates ◽  
Uptake And Release

Hydrogen storage presents a major difficulty in the development of hydrogen economy. Herein, we report a new electrochemical ethylamine/acetonitrile redox method for hydrogen storage with an 8.9 wt.% theoretical storage capacity under ambient conditions. This method exhibits low onset overpotentials of 0.19 V in CH3CH2NH2 dehydrogenation to CH3CN and 0.09 V in CH3CN hydrogenation to CH3CH2NH2 using commercial Pt black catalyst. By assembling a full cell that couples CH3CH2NH2/CH3CN redox reactions with hydrogen evolution and oxidation reactions, we demonstrate a complete hydrogen storage cycle at fast rates, with only 52.5 kJ/mol energy consumption for H2 uptake and release at a rate of 1 L/m2·h. This method provides a viable hydrogen storage strategy that meets the 2025 Department of Energy onboard hydrogen storage target.

First-Principles Study on the Hydrogen Storage of Sandwich-Type Dimetallocenes

2013 ◽  
Vol 677 ◽  
pp. 149-152
Author(s):  
Bo An ◽  
Hai Yan Zhu
Keyword(s):  
Hydrogen Storage ◽  
First Principles ◽  
Storage Capacity ◽  
High Capacity ◽  
First Principles Calculation ◽  
Hydrogen Storage Materials ◽  
Ambient Conditions ◽  
Hydrogen Storage Capacity ◽  
Hydrogen Molecules ◽  
Sandwich Type

The paper mainly focuses on the ability of absorbing hydrogen molecule of the dimetallocene (C5H5)2TM2(TM=Ti/Zn/Cu/Ni) based on the first-principles calculation. The result indicates that these compounds can adsorb up to eight hydrogen molecules, the binding energy is 0.596eV/H2 for Cp2Ti2, 0.802eV/H2 for Cp2Zn2, 0.422eV/H2 for Cp2Cu2 and 0.182eV/H2 for Cp2Ni2 respectively. The corresponding gravimetric hydrogen-storage capacity is 7.1wt% for Cp2Ti2, 6.2wt% for Cp2Zn2, 6.3wt% for Cp2Cu2 and 6.5wt% for Cp2Ni2 respectively. These sandwich-type organometallocenes proposed in this work are favorable for reversible adsorption and desorption of hydrogen under ambient conditions. These predictions will likely provide a new route for developing novel high-capacity hydrogen-storage materials.

Hydrogen Storage Investigation of Fixed Bed of Nanocrystalline Mg-Ni-Cr Mixed Oxides

2013 ◽  
Vol 701 ◽  
pp. 179-183
Author(s):  
M. Abdus Salam ◽  
Suriati Sufian ◽  
Thanabalan Murugesan
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Mixed Oxides ◽  
Fixed Bed ◽  
Hydrogen Storage Material ◽  
Ambient Conditions ◽  
Storage Material ◽  
Hydrogen Storage Capacity ◽  
Adsorption Enthalpy ◽  
Icp Ms

nanocrystalline mixed oxides containing magnesium, nickel and chromium (MNCM) have been synthesized as an adsorbent using coprecipitation method and showed its reversible hydrogen storage capacity at ambient conditions using fixed bed. XRD and ICP-MS analyses ensured the adsorbents phase and homogeneity. The microstructure of mixed oxide has been investigated using FESEM and BET and TEM technique respectively. The adsorbent consisted of mesoporous surface with a surface area of 254-370 m2gm-1and SAED pattern showed that the adsorbents are poly-crystalline. The mixed oxides exhibited a 3.2 wt% H2storage capacity and release 57% of adsorbed H2. Adsorption enthalpy (H) and entropy (S) change of-27.58 kJ/mol and-70.21 J/mol.K are indicating favorable thermodynamics for reversible hydrogen storage material.

FIRST-PRINCIPLES STUDY OF Ti-CATALYZED HYDROGEN ADSORPTION ON LiB (001) SURFACE

2013 ◽  
Vol 12 (07) ◽  
pp. 1350065 ◽  
Author(s):  
WEIBIN ZHANG ◽  
AILING WU ◽  
YIDING LIU ◽  
SHAOLIN ZHANG ◽  
JIANHONG GONG ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
First Principles ◽  
Electronic Structures ◽  
Hydrogen Adsorption ◽  
Department Of Energy ◽  
Hydrogen Storage Material ◽  
Ambient Conditions ◽  
Storage Material ◽  
Practical Applications ◽  
Temperature And Pressure

Ti -doped LiB (001) is a promising material for hydrogen storage. The adsorption of H 2 is greatly enhanced by doping Ti into LiB (001), change the electronic structures of the surface Li , B atoms. After H 2 is adsorbed on the surface, the E ad of the ( H 2)n@ Ti / LiB (001) system is considered. It is around -0.22 eV/ H 2 to -0.31 eV/ H 2, which is close to the target specified by U.S. Department of Energy. The nature of the bonding between Ti and H 2 is due to the H 1s, Ti 4s and B 2s orbital hybridization. In addition, Ti 3d orbital is hybridized strongly with B -2p orbital, resulting in more stable Ti / LiB (001) system. These results are verified by the electron density distribution intuitively. It is found that the system can adsorb up to four H 2 at ambient temperature and pressure. Therefore, the Ti -doped LiB (001) would be a promising hydrogen storage material. Such optimal molecular hydrogen adsorption system makes H 2 adsorption feasible at ambient conditions, which is critical for practical applications.

Hydrogen storage capacity of different carbon nanostructures in ambient conditions

2005 ◽  
Vol 98 (7) ◽  
pp. 074316 ◽  
Author(s):  
Jae Won Jang ◽  
Cheol Eui Lee ◽  
Chan Ick Oh ◽  
Cheol Jin Lee
Keyword(s):  
Hydrogen Storage ◽  
Carbon Nanostructures ◽  
Storage Capacity ◽  
Ambient Conditions ◽  
Hydrogen Storage Capacity

Catalyzed KSiH3as a reversible hydrogen storage material

2016 ◽  
Vol 4 (48) ◽  
pp. 19045-19052 ◽  
Author(s):  
R. Janot ◽  
W. S. Tang ◽  
D. Clémençon ◽  
J.-N. Chotard
Keyword(s):  
Solid State ◽  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Storage Material ◽  
Ambient Conditions ◽  
Storage Material ◽  
Hydrogen Storage Capacity ◽  
Hydrogen Storage Kinetics ◽  
Reversible Formation ◽  
Kinetics Of

Solid-state hydrogen storage through the reversible formation of metallic hydrides is a key issue for the development of hydrogen as an energy vector. Here the hydrogen storage kinetics of the reaction between KSi and KSiH3have been strongly enhanced by catalyst addition. The reaction is perfectly reversible near ambient conditions with a 4.1 wt% hydrogen storage capacity.

Mg–Ti based materials for electrochemical hydrogen storage

2007 ◽  
Vol 22 (6) ◽  
pp. 1640-1649 ◽  
Author(s):  
W.P. Kalisvaart ◽  
H.J. Wondergem ◽  
F. Bakker ◽  
P.H.L. Notten
Keyword(s):  
Hydrogen Storage ◽  
Mechanical Alloying ◽  
Storage Capacity ◽  
Face Centered Cubic ◽  
Ambient Conditions ◽  
Lattice Constants ◽  
Electrochemical Hydrogen Storage ◽  
Face Centered ◽  
Fcc Phase ◽  
Full Conversion

Results of the mechanical alloying of binary Mg–Ti and ternary Mg–Ti–Ni mixtures using two different process control agents are reported. Both high- and low-energy milling resulted in the formation of cubic compounds. When all starting reactants had disappeared, a mixture of two face-centered cubic (fcc) phases was formed with lattice constants around 4.40 and 4.25 Å. The electrochemical hydrogen storage capacity, 450 mAh/g for (Mg0.65Ti0.35)0.95Ni0.05, was about one-third that reported for Mg–Ti thin films. This suggested that only one of the two fcc phases was active at ambient conditions. Prolonged mechanical alloying of (Mg0.60Ti0.40)0.95Ni0.05resulted in full conversion of the material into one fcc-phase with a very small crystallite size, an intermediate lattice constant (4.33 Å), and a sharply decreased storage capacity.

scholarly journals Correction: Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity

2021 ◽  
Author(s):  
L. Scott Blankenship
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogen Storage Capacity ◽  
Cigarette Butt ◽  
Energy Environ

Correction for ‘Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity’ by L. Scott Blankenship et al., Energy Environ. Sci., 2017, 10, 2552–2562, DOI: 10.1039/C7EE02616A.

scholarly journals Enabling Storage and Utilization of Low-Carbon Electricity: Power to Formic Acid

2021 ◽  
Author(s):  
Kuo-Wei Huang ◽  
Sudipta Chatterjee ◽  
Indranil Dutta ◽  
Yanwei Lum ◽  
Zhiping Lai
Keyword(s):  
Hydrogen Storage ◽  
Formic Acid ◽  
Storage Capacity ◽  
Energy Carrier ◽  
Hydrogen Energy ◽  
Low Carbon ◽  
Hydrogen Storage Capacity ◽  
Electricity Power ◽  
Low Toxicity

Formic acid has been proposed as a hydrogen energy carrier because of its many desirable properties, such as low toxicity and flammability, and a high volumetric hydrogen storage capacity of...

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