scholarly journals Nitrogen-Doped Graphene Monolith Catalysts for Oxidative Dehydrogenation of Propane

2021 ◽  
Vol 9 ◽  
Author(s):  
Weijie Liu ◽  
Tianlong Cao ◽  
Xueya Dai ◽  
Yunli Bai ◽  
Xingyu Lu ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxidative Dehydrogenation ◽  
High Surface ◽  
High Surface Area ◽  
Oxidative Dehydrogenation Of Propane ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Dehydrogenation Reactions ◽  
Monolith Catalysts

It’s of paramount importance to develop renewable nanocarbon materials to replace conventional precious metal catalysts in alkane dehydrogenation reactions. Graphene-based materials with high surface area have great potential for light alkane dehydrogenation. However, the powder-like state of the graphene-based materials seriously limits their potential industrial applications. In the present work, a new synthetic route is designed to fabricate nitrogen-doped graphene-based monolith catalysts for oxidative dehydrogenation of propane. The synthetic strategy combines the hydrothermal-aerogel and the post thermo-treatment procedures with urea and graphene as precursors. The structural characterization and kinetic analysis show that the monolithic catalyst well maintains the structural advantages of graphene with relatively high surface area and excellent thermal stability. The homogeneous distributed nitrogen species can effectively improve the yield of propylene (5.3% vs. 1.9%) and lower the activation energy (62.6 kJ mol−1 vs. 80.1 kJ mol−1) in oxidative dehydrogenation of propane reaction comparing with un-doped graphene monolith. An optimized doping amount at 1:1 weight content of the graphene to urea precursors could exhibit the best catalytic performance. The present work paves the way for developing novel and efficient nitrogen-doped graphene monolithic catalysts for oxidative dehydrogenation reactions of propane.

Transforming waste biomass with an intrinsically porous network structure into porous nitrogen-doped graphene for highly efficient oxygen reduction

2016 ◽  
Vol 18 (15) ◽  
pp. 10392-10399 ◽  
Author(s):  
Huang Zhou ◽  
Jian Zhang ◽  
Ibrahim Saana Amiinu ◽  
Chenyu Zhang ◽  
Xiaobo Liu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
High Surface ◽  
High Surface Area ◽  
Koh Activation ◽  
Waste Biomass ◽  
Porous Network ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Novel Strategy

Porous nitrogen-doped graphene with a very high surface area (1152 m2 g−1) is synthesized by a novel strategy using intrinsically porous biomass (soybean shells) as a carbon and nitrogen source via calcination and KOH activation with outstanding oxygen reduction performance.

scholarly journals VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction

NANO ◽  
2018 ◽  
Vol 13 (04) ◽  
pp. 1850041 ◽  
Author(s):  
Jing Wang ◽  
Lan Wang ◽  
Shubin Yang
Keyword(s):  
Quantum Dots ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Structural Features ◽  
Vanadium Nitride ◽  
Transport Pathways ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

A new type of vanadium nitride quantum dots anchored homogeneously onto nitrogen-doped graphene (VNQD-NG) is fabricated as nonprecious metal-based electrocatalysts for ORR via a combined hydrothermal and ammonia annealing process. The unique structural features of VNQD-NG including plentiful VN quantum dots with the sizes of 3–6[Formula: see text]nm, high surface area and multi-level pores afford considerable structural edges and defects as active sites, maximizing the exposed active sites and providing sufficient electron transport pathways for ORR. Hence, the optimized VNQD-NG exhibits high electrocatalytic activity, long durability and high selectivity for ORR, better than commercially available Pt-C.

scholarly journals Precise Blood Glucose Sensing by Nitrogen-Doped Graphene Quantum Dots for Tight Control of Diabetes

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Seyyed Mojtaba Mousavi ◽  
Seyyed Alireza Hashemi ◽  
Ahmad Gholami ◽  
Sargol Mazraedoost ◽  
Wei-Hung Chiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanomaterials ◽  
High Surface ◽  
Graphene Quantum Dots ◽  
High Surface Area ◽  
Critical Factor ◽  
Glucose Sensing ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Graphene quantum dots (GQD) are novel fluorescent carbon nanomaterials based on a graphite structure. Thanks to extraordinary properties such as high surface area and enhanced prevalent optical properties, they have received more interest for special applications. Glucose sensing is a critical factor for the diagnosis, and treatment of diabetes plays an important role and could contribute to the monitoring of diabetes and other related parameters, which has been effectively underscoring the health society. Detecting glucose has been cultivated through different systems, for example, electrochemical or optical techniques. Novel transducers made with GQD that fluorescent coordinate methods have considered the improvement of cutting-edge glucose sensors with prevalent affectability and accommodation. Currently, detection of glucose by nitrogen-doped GQD frameworks concerning the determined objectives has been considerably considered. Here, we explored the properties of fluorescent nitrogen-doped GQD as an excellent and effective index that significantly could promote nitrogen-doped GQDs and make them an appropriate candidate for detecting glucose.

Coassembly and high ORR performance of monodisperse Pt nanocrystals with a mesopore-rich nitrogen-doped graphene aerogel

2017 ◽  
Vol 5 (33) ◽  
pp. 17544-17548 ◽  
Author(s):  
Beibei Xie ◽  
Yong Zhang ◽  
Renjie Zhang
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Large Specific Surface Area ◽  
Graphene Aerogel ◽  
N Content ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Pt Nanocrystals

Monodisperse Pt nanocrystals in NGA with a large specific surface area and high N content yield high ORR performance.

Oxidative dehydrogenation of ethane to ethylene over NiO loaded on high surface area MgO

2006 ◽  
Vol 260 (1-2) ◽  
pp. 144-151 ◽  
Author(s):  
Ken-Ichi Nakamura ◽  
Takanori Miyake ◽  
Toru Konishi ◽  
Toshimitsu Suzuki
Keyword(s):  
Surface Area ◽  
Oxidative Dehydrogenation ◽  
High Surface ◽  
High Surface Area ◽  
Oxidative Dehydrogenation Of Ethane

Cellulose generated-microporous carbon nanosheets with nitrogen doping

RSC Advances ◽  
2014 ◽  
Vol 4 (18) ◽  
pp. 9126-9132 ◽  
Author(s):  
Wenzhong Shen ◽  
Tuoping Hu ◽  
Weibin Fan
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
Pore Volume ◽  
Nitrogen Doping ◽  
High Surface ◽  
High Surface Area ◽  
Structural Features ◽  
Carbon Nanosheets ◽  
Nitrogen Doped ◽  
Adsorption Performance

Nanosheet porous carbon with high surface area and pore volume, unique compositional and structural features endow the nitrogen-doped porous carbon nanosheets with superior CO2 adsorption performance.

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