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.

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 Fabrication of Conjugated Porous Polymer Catalysts for Oxygen Reduction Reactions: A Bottom-Up Approach

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1224
Author(s):  
Sujoy Bandyopadhyay ◽  
Su Ryong Ha ◽  
M. Alam Khan ◽  
Cheongbeom Lee ◽  
Hong In Jeong ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Density Functional ◽  
Condensation Reaction ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Porous Polymer ◽  
Alkaline Media ◽  
Dimensional Structure ◽  
Electron Transfer Mechanism

The present study demonstrates the fabrication of a conjugated porous polymer (CPP-P2) through a Pd-catalyzed Suzuki–Miyaura poly-condensation reaction. 13C cross-polarization solid-state NMR and Fourier transform infrared (FTIR) spectroscopy were used to characterize CPP-P2. Pristine nitrogen-containing CPP was explored as a catalyst for the oxygen reduction reaction in 0.1 M KOH aqueous alkaline media. In the case of CPP-P2,the polymer oxygen reduction reaction occurs via a four-electron transfer mechanism. An understanding of the oxygen reduction at the molecular level and the role of molecular packing in the three-dimensional structure was proposed based on density functional theory (DFT) modeling.

Defect-rich N/S-co-doped porous hollow carbon nanospheres derived from fullerenes as efficient electrocatalysts for the oxygen-reduction reaction and Zn–air batteries

2021 ◽  
Author(s):  
Zhimin He ◽  
Peng Wei ◽  
Ting Xu ◽  
Jiantao Han ◽  
Xuejiao Gao ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Hollow Carbon ◽  
Co Doped

Fullerene-derived N,S-co-doped porous hollow carbon nanospheres with tailored N,S dopants and abundant defects serve as efficient electrocatalysts for the oxygen-reduction reaction and Zn–air batteries.

scholarly journals Metal Organic Framework Derived MnO2-Carbon Nanotubes for Efficient Oxygen Reduction Reaction and Arsenic Removal from Contaminated Water

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1895
Author(s):  
Vadahanambi Sridhar ◽  
Inwon Lee ◽  
Kwang Hyo Jung ◽  
Hyun Park
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Arsenic Removal ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Nano Particles ◽  
Alkaline Media ◽  
Metal Organic

Even though manganese oxides are attractive materials for batteries, super-capacitors and electro-catalysts for oxygen reduction reactions, in most practical applications MnO2 needs to be hybridized with conductive carbon nano-structures to overcome its inherent poor electrical conductivity. In this manuscript we report microwave-assisted synthesis of MnO2 embedded carbon nanotubes (MnO2@CNT) from Mn-H3BTC (benzene-1,3,5-carboxylic acid) metal organic frameworks (MOF) precursors. Using graphene oxide as microwave susceptible surface, MnO2 nano-particles embedded in three dimensional reduced graphene oxide (rGO) -CNT frameworks (MnO2@CNT-rGO) were synthesized which when applied as electro-catalysts in oxygen reduction reaction (ORR) demonstrated comparable half-wave potential to commercial Pt/C, better stability, and excellent immunity to methanol crossover effect in alkaline media. When carbon fiber (CF) was used as substrate, three-dimensional MnO2@CNT-CF were obtained whose utility as effective adsorbents for arsenic removal from contaminated waters is demonstrated.

scholarly journals Heteroatom-doped hollow carbon material as an electrocatalyst for oxygen reduction reaction

2021 ◽  
Vol 2079 (1) ◽  
pp. 012007
Author(s):  
Tiantian Sun ◽  
Heng-guo Wang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Materials ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Diffusion Limited ◽  
Half Wave ◽  
Phosphorus Containing ◽  
Hollow Carbon

Abstract The development of highly efficient and stable non-precious metal electrocatalysts is essential for the oxygen reduction reaction (ORR). In this study, a simple polymerization pyrolysis method is proposed to prepare heteroatom-doped hollow carbon nanospheres (NPSC-800) by using Fe-BDC and phosphorus-containing polymers as precursors. The unique structure allows the catalyst to show good catalytic performance (Initial potential of 0.8786 V, a half-wave potential of 0.7576 V, and a diffusion-limited current density of 4.48 mA cm-2). This research provides an effective strategy for the synthesis of heteroatom-doped carbon materials with good ORR catalytic performance.

Single-atom-sized Ni–N4 sites anchored in three-dimensional hierarchical carbon nanostructures for the oxygen reduction reaction

2020 ◽  
Vol 8 (30) ◽  
pp. 15012-15022
Author(s):  
Zhewei Cai ◽  
Pan Du ◽  
Wenhui Liang ◽  
Hui Zhang ◽  
Ping Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nanostructures ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Single Atom ◽  
High Catalytic Activity ◽  
Hierarchical Carbon

Single-atom-sized Ni–N4 sites embedded in three-dimensional and hierarchically structured carbon exhibit a high catalytic activity for the ORR.

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