A cellulose dissolution and encapsulation strategy to prepare carbon nanospheres with ultra-small size and high nitrogen content for the oxygen reduction reaction

2020 ◽  
Vol 44 (25) ◽  
pp. 10613-10620 ◽  
Author(s):  
Fuping Zhang ◽  
Liu Liu ◽  
Long Chen ◽  
Yulin Shi
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Microcrystalline Cellulose ◽  
Reduction Reaction ◽  
Cellulose Dissolution ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Carbon Nanospheres ◽  
Small N

Space-confined pyrolysis of microcrystalline cellulose (MCC) to prepare ultra-small N-doped carbon nanospheres (NCNs) with high nitrogen content and superior ORR performance.

scholarly journals Stöber synthesis of salen-formaldehyde resin polymer- and carbon spheres with high nitrogen content and application of the corresponding Mn-containing carbon spheres as efficient electrocatalysts for the oxygen reduction reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (46) ◽  
pp. 27575-27584 ◽  
Author(s):  
Tahereh Hosseinzadeh Sanatkar ◽  
Alireza Khorshidi ◽  
Rouhollah Yaghoubi ◽  
Esmail Sohouli ◽  
Jamaladin Shakeri
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Formaldehyde Resin ◽  
Carbon Spheres ◽  
High Nitrogen Content ◽  
High Nitrogen

Stöber synthesis of salen-formaldehyde resin polymer- and carbon spheres.

An etching approach to bimetal-doped hollow carbon nanospheres with boosted oxygen reduction reaction

2020 ◽  
Vol 824 ◽  
pp. 153655
Author(s):  
Yuzhe Wu ◽  
Qipeng Cai ◽  
Yuntong Li ◽  
Huixiang Liu ◽  
Jie Mao ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Hollow Carbon

scholarly journals Cage-confinement of gas-phase ferrocene in zeolitic imidazolate frameworks to synthesize high-loading and atomically dispersed Fe–N codoped carbon for efficient oxygen reduction reaction

2019 ◽  
Vol 7 (27) ◽  
pp. 16508-16515 ◽  
Author(s):  
Guanying Ye ◽  
Qian He ◽  
Suqin Liu ◽  
Kuangmin Zhao ◽  
Yuke Su ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Gas Phase ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Iron Loading ◽  
Zeolitic Imidazolate Frameworks ◽  
High Iron ◽  
Excellent Catalytic Performance

Atomically dispersed iron doped-MOF-derived carbon with high iron loading and nitrogen content for the oxygen reduction reaction via a cage-confinement strategy shows excellent catalytic performance.

Uniform nitrogen and sulfur co-doped carbon nanospheres as catalysts for the oxygen reduction reaction

Carbon ◽  
2014 ◽  
Vol 69 ◽  
pp. 294-301 ◽  
Author(s):  
Chenghang You ◽  
Shijun Liao ◽  
Hualing Li ◽  
Sanying Hou ◽  
Hongliang Peng ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Co Doped

scholarly journals Carbon nanotube-linked hollow carbon nanospheres doped with iron and nitrogen as single-atom catalysts for the oxygen reduction reaction in acidic solutions

2019 ◽  
Vol 7 (24) ◽  
pp. 14478-14482 ◽  
Author(s):  
Jin-Cheng Li ◽  
Min Cheng ◽  
Tao Li ◽  
Lu Ma ◽  
Xiaofan Ruan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Single Atom ◽  
Dimensional Structure ◽  
Carbon Nanospheres ◽  
Acidic Solutions ◽  
Hollow Carbon

A three-dimensional structure consisting of atomically dispersed Fe, N-doped hollow carbon nanospheres linked by carbon nanotubes was engineered as an electrocatalyst showing a high activity for oxygen reduction reaction.

scholarly journals Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts

2020 ◽  
Vol 11 ◽  
pp. 1-15 ◽  
Author(s):  
Maximilian Wassner ◽  
Markus Eckardt ◽  
Andreas Reyer ◽  
Thomas Diemant ◽  
Michael S Elsaesser ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Nitrogen Content ◽  
Oxygen Reduction ◽  
Nitrogen Doping ◽  
Reduction Reaction ◽  
Model Systems ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
N Doping

Amorphous and graphitized nitrogen-doped (N-doped) carbon spheres are investigated as structurally well-defined model systems to gain a deeper understanding of the relationship between synthesis, structure, and their activity in the oxygen reduction reaction (ORR). N-doped carbon spheres were synthesized by hydrothermal treatment of a glucose solution yielding carbon spheres with sizes of 330 ± 50 nm, followed by nitrogen doping via heat treatment in ammonia atmosphere. The influence of a) varying the nitrogen doping temperature (550–1000 °C) and b) of a catalytic graphitization prior to nitrogen doping on the carbon sphere morphology, structure, elemental composition, N bonding configuration as well as porosity is investigated in detail. For the N-doped carbon spheres, the maximum nitrogen content was found at a doping temperature of 700 °C, with a decrease of the N content for higher temperatures. The overall nitrogen content of the graphitized N-doped carbon spheres is lower than that of the amorphous carbon spheres, however, also the microporosity decreases strongly with graphitization. Comparison with the electrocatalytic behavior in the ORR shows that in addition to the N-doping, the microporosity of the materials is critical for an efficient ORR.

scholarly journals Polyacrylamide Microspheres-Derived Fe3C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 767 ◽  
Author(s):  
Ming Chen ◽  
Yu Jiang ◽  
Ping Mei ◽  
Yan Zhang ◽  
Xianfeng Zheng ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Reduction Reaction ◽  
Limiting Current ◽  
Alkaline Solutions ◽  
Carbon Nanospheres ◽  
Hydrogen Electrode ◽  
Efficient Catalyst

High-performance non-precious metal catalysts exhibit high electrocatalytic activity for the oxygen-reduction reaction (ORR), which is indispensable for facilitating the development of multifarious renewable energy systems. In this work; N-doped carbon-encapsulated Fe3C nanosphere ORR catalysts were prepared through simple carbonization of iron precursors loaded with polyacrylamide microspheres. The effect of iron precursors loading on the electrocatalytic activity for ORR was investigated in detail. The electrochemical measurements revealed that the N-doped carbon-encapsulated Fe3C nanospheres exhibited outstanding electrocatalytic activity for ORR in alkaline solutions. The optimized catalyst possessed more positive onset potential (0.94 V vs. reversible hydrogen electrode (RHE)), higher diffusion limiting current (5.78 mA cm−2), better selectivity (the transferred electron number n > 3.98 at 0.19 V vs. RHE) and higher durability towards ORR than a commercial Pt/C catalyst. The efficient electrocatalytic performance towards ORR can be attributed to the synergistic effect between N-doped carbon and Fe3C as catalytic active sites; and the excellent stability results from the core-shell structure of the catalysts.

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