scholarly journals Catalytic Hydrolysis of Ammonia Borane by Cobalt Nickel Nanoparticles Supported on Reduced Graphene Oxide for Hydrogen Generation

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yuwen Yang ◽  
Fei Zhang ◽  
Hualan Wang ◽  
Qilu Yao ◽  
Xiangshu Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Hydrogen Storage ◽  
Reduced Graphene Oxide ◽  
Ammonia Borane ◽  
Reducing Agent ◽  
Hydrogen Storage Material ◽  
Storage Material ◽  
Reduced Graphene ◽  
Total Turnover

Well dispersed magnetically recyclable bimetallic CoNi nanoparticles (NPs) supported on the reduced graphene oxide (RGO) were synthesized by one-step in situ coreduction of aqueous solution of cobalt(II) chloride, nickel (II) chloride, and graphite oxide (GO) with ammonia borane (AB) as the reducing agent under ambient condition. The CoNi/RGO NPs exhibits excellent catalytic activity with a total turnover frequency (TOF) value of 19.54 mol H2 mol catalyst−1 min−1and a low activation energy value of 39.89 kJ mol−1at room temperature. Additionally, the RGO supported CoNi NPs exhibit much higher catalytic activity than the monometallic and RGO-free CoNi counterparts. Moreover, the as-prepared catalysts exert satisfying durable stability and magnetically recyclability for the hydrolytic dehydrogenation of AB, which make the practical reusing application of the catalysts more convenient. The usage of the low-cost, easy-getting catalyst to realize the production of hydrogen under mild condition gives more confidence for the application of ammonia borane as a hydrogen storage material. Hence, this general method indicates that AB can be used as both a potential hydrogen storage material and an efficient reducing agent, and can be easily extended to facile preparation of other RGO-based metallic systems.

scholarly journals Graphene oxide/metal nanocrystal multilaminates as the atomic limit for safe and selective hydrogen storage

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Eun Seon Cho ◽  
Anne M. Ruminski ◽  
Shaul Aloni ◽  
Yi-Sheng Liu ◽  
Jinghua Guo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Storage ◽  
High Pressures ◽  
Storage Capacity ◽  
Hydrogen Fuel ◽  
Hydrogen Storage Material ◽  
Storage Material ◽  
Reduced Graphene ◽  
Atomic Limit ◽  
Scientific Challenge

Abstract Interest in hydrogen fuel is growing for automotive applications; however, safe, dense, solid-state hydrogen storage remains a formidable scientific challenge. Metal hydrides offer ample storage capacity and do not require cryogens or exceedingly high pressures for operation. However, hydrides have largely been abandoned because of oxidative instability and sluggish kinetics. We report a new, environmentally stable hydrogen storage material constructed of Mg nanocrystals encapsulated by atomically thin and gas-selective reduced graphene oxide (rGO) sheets. This material, protected from oxygen and moisture by the rGO layers, exhibits exceptionally dense hydrogen storage (6.5 wt% and 0.105 kg H2 per litre in the total composite). As rGO is atomically thin, this approach minimizes inactive mass in the composite, while also providing a kinetic enhancement to hydrogen sorption performance. These multilaminates of rGO-Mg are able to deliver exceptionally dense hydrogen storage and provide a material platform for harnessing the attributes of sensitive nanomaterials in demanding environments.

Ultrafine Pt–Ru bimetallic nanoparticles anchored on reduced graphene oxide sheets as highly active electrocatalysts for methanol oxidation

2017 ◽  
Vol 1 (4) ◽  
pp. 757-766 ◽  
Author(s):  
G. Vishwakshan Reddy ◽  
P. Raghavendra ◽  
B. Ankamwar ◽  
P. Sri Chandana ◽  
S. M. Senthil Kumar ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Methanol Oxidation ◽  
Bimetallic Nanoparticles ◽  
Ammonia Borane ◽  
Reducing Agent ◽  
Highly Active ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

Herein, uniform sized Pt–Ru bimetallic nanoparticles were deposited on a reduced graphene oxide (RGO) support using methyl ammonia borane as a reducing agent.

Facile in situ synthesis of copper nanoparticles supported on reduced graphene oxide for hydrolytic dehydrogenation of ammonia borane

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 13749-13752 ◽  
Author(s):  
Yuwen Yang ◽  
Zhang-Hui Lu ◽  
Yujuan Hu ◽  
Zhujun Zhang ◽  
Weimei Shi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Copper Nanoparticles ◽  
Ammonia Borane ◽  
In Situ Synthesis ◽  
Reduced Graphene

A facile in situ procedure has been successfully applied for synthesis of a RGO/Cu nanocomposite, which leads to the highest catalytic activity of Cu nanocatalysts up to now for the dehydrogenation of ammonia borane.

3D Porous Nb2C MXene/Reduced Graphene Oxide Aerogel Coupled with NiFe Alloy Nanoparticles for Wearable Zn–Air Batteries

2021 ◽  
Author(s):  
Hang Lei ◽  
Shangjing Yang ◽  
Runquan Lei ◽  
Qing Zhong ◽  
Qixiang Wan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Alloy Nanoparticles ◽  
Reduced Graphene ◽  
Reduced Graphene Oxide Aerogel ◽  
Graphene Oxide Aerogel ◽  
Catalytic Processes

Insufficient catalytic activity and self-restacking of 2D MXenes during catalytic processes would lead to limited number of active sites, sluggish ionic kinetics and poor durability, extremely restricting its application in...

Multiwalled carbon nanotube@reduced graphene oxide nanoribbon heterostructure: synthesis, intrinsic peroxidase-like catalytic activity, and its application in colorimetric biosensing

2015 ◽  
Vol 3 (8) ◽  
pp. 1624-1632 ◽  
Author(s):  
Jing Qian ◽  
Xingwang Yang ◽  
Zhenting Yang ◽  
Gangbing Zhu ◽  
Hanping Mao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Reduced Graphene Oxide ◽  
Multiwalled Carbon Nanotube ◽  
Core Shell ◽  
Multiwalled Carbon ◽  
Peroxidase Mimetic ◽  
Reduced Graphene ◽  
Colorimetric Biosensing

The MWCNT@rGONR core–shell heterostructure was proved to be a novel peroxidase mimetic and has been used for colorimetric biosensing of cholesterol.

Electrocatalytic study of a 1,10-phenanthroline–cobalt(ii) metal complex catalyst supported on reduced graphene oxide towards oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33302-33307 ◽  
Author(s):  
Cancan Ren ◽  
Haibo Li ◽  
Rui Li ◽  
Shuling Xu ◽  
Denghu Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Metal Complex ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduced Graphene Oxide ◽  
Reduction Reaction ◽  
Complex Catalyst ◽  
Reduced Graphene ◽  
High Efficient

1,10-Phenanthroline–cobalt(ii) metal-complex supported on rGO exhibited a high efficient four-electron catalytic activity towards ORR.

Mussel-inspired construction of thermo-responsive double-hydrophilic diblock copolymers-decorated reduced graphene oxide as effective catalyst supports for highly dispersed superfine Pd nanoparticles

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12487-12496 ◽  
Author(s):  
Haichao Duan ◽  
Yu Yang ◽  
Jianhua Lü ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Pd Nanoparticles ◽  
Catalyst Supports ◽  
High Catalytic Activity ◽  
Reduced Graphene ◽  
Highly Dispersed

We report a facile, mussel-inspired construction of a thermo-responsive diblock copolymer-anchored rGO support for superfine PdNPs with high catalytic activity.

scholarly journals Nano-inclusion in one step: spontaneous ice-templating of porous hierarchical nanocomposites for selective hydrogen release

2019 ◽  
Vol 3 (2) ◽  
pp. 396-400 ◽  
Author(s):  
Simon Champet ◽  
Jan van den Berg ◽  
Robert Szczesny ◽  
Agata Godula-Jopek ◽  
Duncan H. Gregory
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Ammonia Borane ◽  
Onset Temperature ◽  
Hydrogen Release ◽  
Aqueous Suspensions ◽  
Reduced Graphene ◽  
One Step ◽  
Ice Templating

3-D nanocomposites of (reduced) graphene oxide and ammonia borane can be fabricated in a one-step ice templating process from aqueous suspensions. The nanocomposites release hydrogen at a reduced onset temperature, suppressing the release of diborane, borazine and ammonia.

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