Towards high-efficiency nanoelectrocatalysts for oxygen reduction through engineering advanced carbon nanomaterials

2016 ◽  
Vol 45 (5) ◽  
pp. 1273-1307 ◽  
Author(s):  
Ming Zhou ◽  
Hsing-Lin Wang ◽  
Shaojun Guo
Keyword(s):  
Transition Metal ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Carbon Nanomaterials ◽  
High Efficiency ◽  
Iron Carbide ◽  
Carbon Nanomaterial ◽  
Metal Free ◽  
Recent Developments

We summarize and discuss recent developments of different-dimensional advanced carbon nanomaterial-based noble-metal-free high-efficiency oxygen reduction electrocatalysts, including heteroatom-doped, transition metal-based nanoparticle-based, and especially iron carbide (Fe3C)-based carbon nanomaterial composites.

scholarly journals Noble-metal-free Co3S4–S/G porous hybrids as an efficient electrocatalyst for oxygen reduction reaction

2016 ◽  
Vol 7 (7) ◽  
pp. 4167-4173 ◽  
Author(s):  
Wenling Gu ◽  
Liuyong Hu ◽  
Wei Hong ◽  
Xiaofang Jia ◽  
Jing Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Free Oxygen ◽  
Metal Free ◽  
Reduced Graphene ◽  
Support Matrix

A high-efficiency noble-metal-free oxygen reduction reaction (ORR) catalyst was obtained based on the pyrolysis of the inexpensive precursor cobalt dithiolene (an S4-chelate complex) on simultaneously reduced graphene oxide (GO) as a support matrix.

Nitrogen-doped 3D porous carbons with iron carbide nanoparticles encapsulated in graphitic layers derived from functionalized MOF as an efficient noble-metal-free oxygen reduction electrocatalysts in both acidic and alkaline media

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110820-110830 ◽  
Author(s):  
Juanhong Xue ◽  
Ling Zhao ◽  
Zhiyu Dou ◽  
Yan Yang ◽  
Yue Guan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Noble Metal ◽  
Iron Carbide ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Porous Carbons ◽  
Free Oxygen ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Acidic And Alkaline Media

Functionalized 3D porous carbons comprising encased iron carbide species, derived from a MOF, display outstanding ORR performance in both acidic and alkaline solutions.

Egg derived nitrogen-self-doped carbon/carbon nanotube hybrids as noble-metal-free catalysts for oxygen reduction

2014 ◽  
Vol 271 ◽  
pp. 522-529 ◽  
Author(s):  
Jian Zhang ◽  
Siyu Wu ◽  
Xu Chen ◽  
Mu Pan ◽  
Shichun Mu
Keyword(s):  
Carbon Nanotube ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Metal Free

Polyoxomolybdate anchored graphite oxide: Noble metal-free electrocatalyst for oxygen reduction reaction

2019 ◽  
Vol 44 (45) ◽  
pp. 24922-24933 ◽  
Author(s):  
Sagar B. Ingavale ◽  
Indrajit Patil ◽  
Haridas Parse ◽  
Divya Catherin Sesu ◽  
Phiralang Marbaniang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Graphite Oxide ◽  
Reduction Reaction ◽  
Metal Free

Noble‐Metal‐Free Doped Carbon Nanomaterial Electrocatalysts

2020 ◽  
Vol 26 (67) ◽  
pp. 15397-15415 ◽  
Author(s):  
Ioanna K. Sideri ◽  
Nikos Tagmatarchis
Keyword(s):  
Noble Metal ◽  
Carbon Nanomaterial ◽  
Metal Free

Transition-Metal-Free Catalysis for the Reductive ­Functionalization of CO2 with Amines

Synlett ◽  
2018 ◽  
Vol 29 (05) ◽  
pp. 548-555 ◽  
Author(s):  
Liang-Nian He ◽  
Xiao-Fang Liu ◽  
Xiao-Ya Li ◽  
Chang Qiao
Keyword(s):  
Transition Metal ◽  
Energy Content ◽  
Bond Formation ◽  
Energy Storage Materials ◽  
One Pot ◽  
Metal Free ◽  
Recent Developments ◽  
Electron Reduction ◽  
Reduction Of Co2 ◽  
Hierarchical Reduction

Reductive functionalization of CO2 with amines and a reductant, which combines both reduction of CO2 and C–N bond formation in one pot to produce versatile chemicals and energy-storage materials such as formamides, aminals, and methylamines that are usually derived from petroleum feedstock, would be appealing and promising. Herein, we give a brief review on recent developments in the titled CO2 chemistry by employing transition-metal-free catalysis, which can be catalogued as below according to the diversified energy content of the products, that is formamides, aminals, and methylamines being consistent with 2-, 4-, and 6-electron reduction of CO2, respectively. Notably, hierarchical reduction of CO2 with amines to afford at least two products, for example, formamides and methylamines, could be realized with the same catalyst through tuning the hydrosilane type, reaction temperature, or CO2 pressure. Finally, the opportunities and challenges of the reductive functionalization of CO2 with amines are also highlighted.1 Introduction2 2-Electron Reduction of CO2 to Formamide3 6-Electron Reduction of CO2 to Methylamine4 4-Electron Reduction of CO2 to Aminal5 Hierarchical Reduction of CO2 with Amines6 Conclusion

Nanocarbon-intercalated and Fe–N-codoped graphene as a highly active noble-metal-free bifunctional electrocatalyst for oxygen reduction and evolution

2017 ◽  
Vol 5 (5) ◽  
pp. 1930-1934 ◽  
Author(s):  
Daping He ◽  
Yuli Xiong ◽  
Jinlong Yang ◽  
Xu Chen ◽  
Zhaoxiang Deng ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Noble Metal ◽  
Bifunctional Electrocatalyst ◽  
Metal Free ◽  
Highly Active

A highly active bifunctional electrocatalyst for oxygen reduction and evolution reactions was developed based on nanocarbon-intercalated and Fe–N-codoped graphene materials.

scholarly journals N-doped carbon nanomaterials are durable catalysts for oxygen reduction reaction in acidic fuel cells

2015 ◽  
Vol 1 (1) ◽  
pp. e1400129 ◽  
Author(s):  
Jianglan Shui ◽  
Min Wang ◽  
Feng Du ◽  
Liming Dai
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nanomaterials ◽  
Low Cost ◽  
Clean Energy ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Metal Free ◽  
Carbon Based

The availability of low-cost, efficient, and durable catalysts for oxygen reduction reaction (ORR) is a prerequisite for commercialization of the fuel cell technology. Along with intensive research efforts of more than half a century in developing nonprecious metal catalysts (NPMCs) to replace the expensive and scarce platinum-based catalysts, a new class of carbon-based, low-cost, metal-free ORR catalysts was demonstrated to show superior ORR performance to commercial platinum catalysts, particularly in alkaline electrolytes. However, their large-scale practical application in more popular acidic polymer electrolyte membrane (PEM) fuel cells remained elusive because they are often found to be less effective in acidic electrolytes, and no attempt has been made for a single PEM cell test. We demonstrated that rationally designed, metal-free, nitrogen-doped carbon nanotubes and their graphene composites exhibited significantly better long-term operational stabilities and comparable gravimetric power densities with respect to the best NPMC in acidic PEM cells. This work represents a major breakthrough in removing the bottlenecks to translate low-cost, metal-free, carbon-based ORR catalysts to commercial reality, and opens avenues for clean energy generation from affordable and durable fuel cells.

scholarly journals Noble-Metal-Free Iron Nitride/Nitrogen-Doped Graphene Composite for the Oxygen Reduction Reaction

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 130-139 ◽  
Author(s):  
Tamás Varga ◽  
Lívia Vásárhelyi ◽  
Gergő Ballai ◽  
Henrik Haspel ◽  
Albert Oszkó ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Reduction Reaction ◽  
Iron Nitride ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Graphene Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Recent Developments in Transition-Metal-Free Functionalization and Derivatization Reactions of Pyridines

Synlett ◽  
2020 ◽  
Author(s):  
Lei Jiao ◽  
Fei-Yu Zhou
Keyword(s):  
Transition Metal ◽  
Structural Motif ◽  
Metal Exchange ◽  
Coupling Reactions ◽  
Phosphonium Salts ◽  
Metal Free ◽  
Radical Coupling ◽  
In Situ Activation ◽  
Recent Developments

AbstractPyridine is an important structural motif that is prevalent in natural products, drugs, and materials. Methods that functionalize and derivatize pyridines have gained significant attention. Recently, a large number of transition-metal-free reactions have been developed. In this review, we provide a brief summary of recent advances in transition-metal-free functionalization and derivatization reactions of pyridines, categorized according to their reaction modes.1 Introduction2 Metalated Pyridines as Nucleophiles2.1 Deprotonation2.2 Halogen–Metal exchange3 Activated Pyridines as Electrophiles3.1 Asymmetric 2-Allylation by Chiral Phosphite Catalysis3.2 Activation of Pyridines by a Bifunctional Activating Group3.3 Alkylation of Pyridines by 1,2-Migration3.4 Alkylation of Pyridines by [3+2] Addition3.5 Pyridine Derivatization by Catalytic In Situ Activation Strategies3.6 Reactions via Heterocyclic Phosphonium Salts4 Radical Reactions for Pyridine Functionalization4.1 Pyridine Functionalization through Radical Addition Reactions4.2 Pyridine Functionalization through Radical–Radical Coupling Reactions5 Derivatization of Pyridines through the Formation of Meisenheimer-Type Pyridyl Anions6 Conclusion

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