One-step synthesis of nitrogen-doped graphene supported PdSn bimetallic catalysts for ethanol oxidation in alkaline media

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 19314-19321 ◽  
Author(s):  
Yue Feng ◽  
Duan Bin ◽  
Ke Zhang ◽  
Fangfang Ren ◽  
Jin Wang ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Ethanol Oxidation ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Alkaline Media ◽  
Chemical Reduction Method ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
One Step

In this paper, a facile chemical reduction method was employed to synthesize bimetallic PdSn nanocatalysts, and the nitrogen-doped graphene (N-G) has been used as a conductive support material for PdSn catalysts.

scholarly journals Electroanalytical Performance of Nitrogen-Doped Graphene Films Processed in One Step by Pulsed Laser Deposition Directly Coupled with Thermal Annealing

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 666 ◽  
Author(s):  
Florent Bourquard ◽  
Yannick Bleu ◽  
Anne-Sophie Loir ◽  
Borja Caja-Munoz ◽  
José Avila ◽  
...  
Keyword(s):  
High Temperature ◽  
Pulsed Laser Deposition ◽  
Graphene Film ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Synthesis Process ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
One Step

Graphene-based materials are widely studied to enable significant improvements in electroanalytical devices requiring new generations of robust, sensitive and low-cost electrodes. In this paper, we present a direct one-step route to synthetize a functional nitrogen-doped graphene film onto a Ni-covered silicon electrode substrate heated at high temperature, by pulsed laser deposition of carbon in the presence of a surrounding nitrogen atmosphere, with no post-deposition transfer of the film. With the ferrocene methanol system, the functionalized electrode exhibits excellent reversibility, close to the theoretical value of 59 mV, and very high sensitivity to hydrogen peroxide oxidation. Our electroanalytical results were correlated with the composition and nanoarchitecture of the N-doped graphene film containing 1.75 at % of nitrogen and identified as a few-layer defected and textured graphene film containing a balanced mixture of graphitic-N and pyrrolic-N chemical functions. The absence of nitrogen dopant in the graphene film considerably degraded some electroanalytical performances. Heat treatment extended beyond the high temperature graphene synthesis did not significantly improve any of the performances. This work contributes to a better understanding of the electrochemical mechanisms of doped graphene-based electrodes obtained by a direct and controlled synthesis process.

Synthesis of FeCo nanocrystals encapsulated in nitrogen-doped graphene layers for use as highly efficient catalysts for reduction reactions

Nanoscale ◽  
2015 ◽  
Vol 7 (2) ◽  
pp. 450-454 ◽  
Author(s):  
Lin Hu ◽  
Ruirui Zhang ◽  
Lingzhi Wei ◽  
Fapei Zhang ◽  
Qianwang Chen
Keyword(s):  
Thermal Decomposition ◽  
Prussian Blue ◽  
Prussian Blue Analogue ◽  
Reduction Reactions ◽  
Graphene Layers ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
One Step

A facile strategy to fabricate FeCo nanocrystals with nitrogen-doped graphene shells has been designed, which involves one-step thermal decomposition of Prussian blue analogue (PBA) Fe3[Co(CN)6]2spheres.

scholarly journals Ruthenium-cobalt nanoalloys encapsulated in nitrogen-doped graphene as active electrocatalysts for producing hydrogen in alkaline media

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Jianwei Su ◽  
Yang Yang ◽  
Guoliang Xia ◽  
Jitang Chen ◽  
Peng Jiang ◽  
...  
Keyword(s):  
Density Functional ◽  
Platinum Group Metal ◽  
Alkaline Media ◽  
Alkaline Water Electrolysis ◽  
Graphene Layers ◽  
Nitrogen Doped ◽  
High Efficient ◽  
Production Of Hydrogen ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Abstract The scalable production of hydrogen could conveniently be realized by alkaline water electrolysis. Currently, the major challenge confronting hydrogen evolution reaction (HER) is lacking inexpensive alternatives to platinum-based electrocatalysts. Here we report a high-efficient and stable electrocatalyst composed of ruthenium and cobalt bimetallic nanoalloy encapsulated in nitrogen-doped graphene layers. The catalysts display remarkable performance with low overpotentials of only 28 and 218 mV at 10 and 100 mA cm−2, respectively, and excellent stability of 10,000 cycles. Ruthenium is the cheapest platinum-group metal and its amount in the catalyst is only 3.58 wt.%, showing the catalyst high activity at a very competitive price. Density functional theory calculations reveal that the introduction of ruthenium atoms into cobalt core can improve the efficiency of electron transfer from alloy core to graphene shell, beneficial for enhancing carbon–hydrogen bond, thereby lowing ΔGH* of HER.

scholarly journals Caffeine as Nitrogen Source for Reduce Graphene Doping, and Its Functionalization with Silver Nanowires

2018 ◽  
Author(s):  
Daniel Ramirez-Gonzalez ◽  
Jose de Jesus Cruz-Rivera ◽  
Hugo Tiznado ◽  
Angel Gabriel Rodriguez-Vazquez ◽  
Ivan Guillen-Escamilla ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Nitrogen Source ◽  
Silver Nanowires ◽  
Chemical Reduction ◽  
Low Cost ◽  
Nitrogen Doped ◽  
Nanowires Growth ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Ft Ir

In this work, we propose an easy and a low cost method for the synthesis of Nitrogen-Doped Graphene NDG and its silver nanowires NW functionalization NWGN. The synthesis was performed using the improved graphene oxide method, chemical reduction of graphene oxide in the presence of caffeine as green nitrogen source and the subsequently the silver nanowires growth in the surface, by the chemical reductions salts in the presence of NG. Achieving a homogeneous growing (coating) of graphene sheets. The samples were analyzed using conventional characterization techniques: SEM-EDX, XRD, FT-IR, RAMAN, TEM, HRTEM, STEM and XPS.

scholarly journals Electrocatalytic Glucose Oxidation at Coral-Like Pd/C3N4-C Nanocomposites in Alkaline Media

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 440 ◽  
Author(s):  
Guang Dong ◽  
Qingqing Lu ◽  
Haihui Jiang ◽  
Chunfang Li ◽  
Yingying Gong ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Reduction Method ◽  
Chemical Reduction ◽  
High Sensitivity ◽  
Pd Nanoparticles ◽  
Glucose Sensing ◽  
Alkaline Media ◽  
Chemical Reduction Method ◽  
One Pot ◽  
Glucose Electrooxidation

Porous coral-like Pd/C3N4-C nanocomposites are fabricated by a simple one-pot chemical reduction method. Their electrocatalytic performance is ~50% higher than a carbon-loaded palladium electrocatalyst (Pd/C) in alkaline media. This confirms that the glucose electrooxidation and sensing performance of a Pd/C can be improved by the synergy of graphitic carbon nitride (C3N4), though C3N4 exhibits poor electrical conductivity. Compared to Pd/C, the size of Pd nanoparticles in Pd/C3N4-C decreases. As a result, the activity of Pd/C3N4-C is enhanced due to the higher dispersion and the synergistic effect. Pd/C3N4-C presents a rapid response and high sensitivity to glucose. The sensitivity for glucose sensing at Pd/C3N4-C is 3.3 times that of at Pd/C in the range of 0.001–10 mM. In the lower range of 0.001–1 mM, the sensitivity at Pd/C3N4-C is ~10 times greater than Pd/C.

Ultrafine bimetallic Pt–Ni nanoparticles immobilized on 3-dimensional N-doped graphene networks: a highly efficient catalyst for dehydrogenation of hydrous hydrazine

2019 ◽  
Vol 7 (1) ◽  
pp. 112-115 ◽  
Author(s):  
Amit Kumar ◽  
Xinchun Yang ◽  
Qiang Xu
Keyword(s):  
Catalytic Activity ◽  
Reduction Method ◽  
Chemical Reduction ◽  
High Catalytic Activity ◽  
Ni Nanoparticles ◽  
Chemical Reduction Method ◽  
Efficient Catalyst ◽  
3 Dimensional ◽  
Doped Graphene ◽  
Wet Chemical

Ultrafine and uniformly dispersed bimetallic Pt–Ni nanoparticles (NPs) have been immobilized on novel 3-dimensional N-doped graphene networks (NGNs) by a facile wet chemical reduction method, which exhibit extremely high catalytic activity for the dehydrogenation of hydrazine hydrate.

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