Ultrafine NiCoP-decorated N,S,P-codoped hierarchical porous carbon nanosheets as an efficient bifunctional electrocatalyst for oxygen reduction and oxygen evolution

2019 ◽  
Vol 3 (9) ◽  
pp. 1849-1858 ◽  
Author(s):  
Hua-Jie Niu ◽  
Ai-Jun Wang ◽  
Lu Zhang ◽  
Jing-Jing Guo ◽  
Jiu-Ju Feng
Keyword(s):  
Oxygen Evolution ◽  
Porous Carbon ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Hierarchical Porous Carbon ◽  
Carbon Nanosheets ◽  
Bifunctional Electrocatalyst ◽  
Pyrolysis Method ◽  
Hierarchical Porous ◽  
The Stability

Large-scaled NiCoP/NSP-HPCNS were fabricated by a facile pyrolysis method. Porous carbon nanosheets provided extra active sites easily available for reactants, and dramatically improved the stability. The nanocomposites displayed remarkable enhancement in electrocatalytic activity and durability for ORR and OER.

Preparation of Fe/N co-doped hierarchical porous carbon nanosheets derived from chitosan nanofibers for high-performance supercapacitors

2021 ◽  
pp. 1-16
Author(s):  
Yaqi Yang ◽  
Ziqiang Shao ◽  
Feijun Wang
Keyword(s):  
Specific Surface ◽  
Specific Capacitance ◽  
Surface Area ◽  
Double Layer ◽  
Specific Surface Area ◽  
Porous Carbon ◽  
Active Sites ◽  
Transport Pathway ◽  
Carbon Nanosheets ◽  
Hierarchical Porous

Abstract Due to the low specific capacitance and small specific surface area of conventional carbon materials used as electrode materials for double-layer capacitors, the search for more ideal materials and ingenious preparation methods remains a major challenge. In this study, fractional porous carbon nanosheets were prepared by co-doping Fe and N with chitosan as nitrogen source. The advantage of this method is that the carbon nanosheets can have a large number of pore structures and produce a large specific surface area. The presence of Fe catalyzes the graphitization of carbon in the carbon layer during carbonization process, and further increases the specific surface area of the electrode material. This structure provides an efficient ion and electron transport pathway, which enables more active sites to participate in the REDOX reaction, thus significantly enhancing the electrochemical performance of SCs. The specific surface area of CS-800 is up to 1587 m2 g−1. When the current density is 0.5 A g−1, the specific capacitance of CS-800 reaches 308.84 F g−1, and remains 84.61 % of the initial value after 10,000 cycles. The Coulomb efficiency of CS-800 is almost 100 % after a long cycle, which indicates that CS-800 has more ideal double-layer capacitance and pseudo capacitance.

Biowaste-Derived Hierarchical Porous Carbon Nanosheets for Ultrahigh Power Density Supercapacitors

ChemSusChem ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1678-1685 ◽  
Author(s):  
Dengfeng Yu ◽  
Chong Chen ◽  
Gongyuan Zhao ◽  
Lei Sun ◽  
Baosheng Du ◽  
...  
Keyword(s):  
Power Density ◽  
Porous Carbon ◽  
Hierarchical Porous Carbon ◽  
Carbon Nanosheets ◽  
Hierarchical Porous

Fe2 N/S/N Codecorated Hierarchical Porous Carbon Nanosheets for Trifunctional Electrocatalysis

Small ◽  
2018 ◽  
Vol 14 (49) ◽  
pp. 1803500 ◽  
Author(s):  
Asif Mahmood ◽  
Hassina Tabassum ◽  
Ruo Zhao ◽  
Wenhan Guo ◽  
Waseem Aftab ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Hierarchical Porous Carbon ◽  
Carbon Nanosheets ◽  
Hierarchical Porous

Electrochemical capacitive energy storage in PolyHIPE derived nitrogen enriched hierarchical porous carbon nanosheets

Carbon ◽  
2018 ◽  
Vol 128 ◽  
pp. 287-295 ◽  
Author(s):  
Ashvini B. Deshmukh ◽  
Archana C. Nalawade ◽  
Indrapal Karbhal ◽  
Mohammed Shadbar Qureshi ◽  
Manjusha V. Shelke
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Hierarchical Porous Carbon ◽  
Capacitive Energy Storage ◽  
Carbon Nanosheets ◽  
Hierarchical Porous
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