scholarly journals The Influence of Hollow Carbon Sphere in Heterogeneous Catalysis

2021 ◽  
Vol 2 (3) ◽  
pp. 18-26
Author(s):  
Bonakele Patricia Mtolo ◽  
Venkataraman Vishwanathan
Keyword(s):  
High Surface ◽  
Textural Properties ◽  
Storage Device ◽  
Carbon Sphere ◽  
Thermal Stabilities ◽  
Carbon Particles ◽  
Surface Functionality ◽  
Permeability Surface ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Hollow carbon spheres (HCSs) are hollow structured carbon particles of sizes ranging between micron and nanometre sizes with thin outer shells. They are of importance for their unique properties such as encapsulation ability, controllable permeability, surface functionality, high surface-to-volume ratios, and excellent chemical and thermal stabilities. In this communication, a precise description is presented of the synthesis, characterization, and applications of HCSs. Synthesis of HCSs is normally carried out in two ways, namely, hard-templating and soft-templating methods. These materials are characterized by modern techniques to investigate their structural and textural properties to get an insight into the material. Finally, the recent progress made in the applications of HCSs has been reported in the area of catalysis as a support material and energy storage device.

Surface and Interface Engineering of Hollow Carbon Sphere-based Electrocatalysts for Oxygen Reduction Reaction

2021 ◽  
Author(s):  
Chunmei Zhang ◽  
Jingsha Li ◽  
Chang Ming Li ◽  
Wei Chen ◽  
Chunxian Guo
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Reduction Reaction ◽  
Carbon Sphere ◽  
Surface And Interface ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Hollow carbon spheres (HCSs) attract broad interest in the area of electrocatalysis, especially in oxygen reduction reaction (ORR) owing to high surface area, abundant accessible active sites, discrete voids, and...

Encapsulating sulfur into highly graphitized hollow carbon spheres as high performance cathode for lithium–sulfur batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98035-98041 ◽  
Author(s):  
Shuangke Liu ◽  
Xiaobin Hong ◽  
Yujie Li ◽  
Jing Xu ◽  
Chunman Zheng ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Capacity Retention ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Encapsulating sulfur into a highly graphitized hollow carbon sphere (GHCS) is proposed as sulfur cathode, the S@GHCS delivers a high discharge capacity of ∼800 mA h g−1at 4C rate and high capacity retention of 93.7% after 240 cycles.

The synthesis of a core–shell MnO2/3D-ordered hollow carbon sphere composite and its superior electrochemical capability for lithium ion batteries

2014 ◽  
Vol 2 (18) ◽  
pp. 6343-6347 ◽  
Author(s):  
Zang Jun ◽  
Chen Jia-jia ◽  
Zhang Cheng-long ◽  
Qian Hang ◽  
Zheng Ming-sen ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Core Shell ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Hollow Carbon Sphere ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

A hierarchical core–shell MnO2/3D-ordered hollow carbon sphere composite was designed and synthesized by using hollow carbon spheres (HCS) as a carbon matrix.

Encapsulation pyrolysis synchronous deposition for hollow carbon sphere with tunable textural properties

Carbon ◽  
2019 ◽  
Vol 143 ◽  
pp. 467-474 ◽  
Author(s):  
Juan Du ◽  
Lei Liu ◽  
Beibei Liu ◽  
Yifeng Yu ◽  
Haijun Lv ◽  
...  
Keyword(s):  
Textural Properties ◽  
Carbon Sphere ◽  
Hollow Carbon Sphere ◽  
Hollow Carbon

Entrapping polysulfides by using ultrathin hollow carbon sphere-functionalized separators in high-rate lithium-sulfur batteries

2018 ◽  
Vol 6 (34) ◽  
pp. 16610-16616 ◽  
Author(s):  
Jianjun Song ◽  
Chaoyue Zhang ◽  
Xin Guo ◽  
Jinqiang Zhang ◽  
Linqu Luo ◽  
...  
Keyword(s):  
High Rate ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Hollow Carbon Sphere ◽  
Lithium Sulfur Batteries ◽  
Overall Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur

Novel ultrathin hollow carbon spheres with a nonporous shell are employed as polysulfide reservoirs to improve the overall performance of Li-S batteries.

scholarly journals Hollow carbon spheres and a hollow carbon sphere/polyvinylpyrrolidone composite as ammonia sensors

2017 ◽  
Vol 5 (6) ◽  
pp. 2539-2549 ◽  
Author(s):  
Bridget K. Mutuma ◽  
Rafael Rodrigues ◽  
Kamalakannan Ranganathan ◽  
Boitumelo Matsoso ◽  
Daniel Wamwangi ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Hollow Carbon Sphere ◽  
Humid Environment ◽  
Pattern Recognition Approach ◽  
Ammonia Sensors ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Hollow carbon sphere sensors were used to determine NH3 in a humid environment using a tristimulus pattern recognition approach.

Ultrasensitive simultaneous detection of ascorbic acid, dopamine, uric acid and acetaminophen on graphitized porous carbon modified electrode

2020 ◽  
Author(s):  
Velu Duraisamy ◽  
Sudha Velayutham ◽  
Annadurai Kuppusamy ◽  
Senthil Kumar Murugesan S M ◽  
R. Thangamuthu
Keyword(s):  
Ascorbic Acid ◽  
Mesoporous Carbon ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Simultaneous Detection ◽  
Carbon Sphere ◽  
Mesoporous Carbon Material ◽  
Hollow Carbon ◽  
Defective Sites

The development of active and defective sites containing mesoporous carbon material is highly crucial for high-performance sensors. In this work, N-doped hollow carbon sphere (NHCS) materials with high surface area...

Enhanced catalytic activity of low-Pt content nanocatalysts supported on hollow carbon spheres for the ORR in alkaline media

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2961-2972
Author(s):  
P.C. Meléndez-González ◽  
E. Garza-Duran ◽  
J.C. Martínez-Loyola ◽  
P. Quintana-Owen ◽  
I.L. Alonso-Lemus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Anion Exchange ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Average Particle ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

In this work, low-Pt content nanocatalysts (≈ 5 wt. %) supported on Hollow Carbon Spheres (HCS) were synthesized by two routes: i) colloidal conventional polyol, and ii) surfactant-free Bromide Anion Exchange (BAE). The nanocatalysts were labelled as Pt/HCS-P and Pt/HCS-B for polyol and BAE, respectively. The physicochemical characterization of the nanocatalysts showed that by following both methods, a good control of chemical composition was achieved, obtaining in addition well dispersed nanoparticles of less than 3 nm TEM average particle size (d) on the HCS. Pt/HCS-B contained more Pt0 species than Pt/HCS-P, an effect of the synthesis method. In addition, the structure of the HCS remains more ordered after BAE synthesis, compared to polyol. Regarding the catalytic activity for the Oxygen Reduction Reaction (ORR) in 0.5 M KOH, Pt/HCS-P and Pt/HCS-B showed a similar performance in terms of current density (j) at 0.9 V vs. RHE than the benchmark commercial 20 wt. % Pt/C. However, Pt/HCS-P and Pt/HCS-B demonstrated a 6 and 5-fold increase in mass catalytic activity compared to Pt/C, respectively. A positive effect of the high specific surface area of the HCS and its interactions with metal nanoparticles and electrolyte, which promoted the mass transfer, increased the performance of Pt/HCS-P and Pt/HCS-B. The high catalytic activity showed by Pt/HCS-B and Pt/HCS-P for the ORR, even with a low-Pt content, make them promising cathode nanocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC).

N-doped hierarchical porous hollow carbon spheres with multi-cavities for high performance Na-ion storage

2021 ◽  
Vol 506 ◽  
pp. 230170
Author(s):  
Lantao Liu ◽  
Xiangyu Sun ◽  
Yue Dong ◽  
Dengke Wang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Spheres ◽  
Hierarchical Porous ◽  
Ion Storage ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres
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