Soft-template assisted synthesis of Fe/N-doped hollow carbon nanospheres as advanced electrocatalysts for the oxygen reduction reaction in microbial fuel cells

2017 ◽  
Vol 5 (36) ◽  
pp. 19343-19350 ◽  
Author(s):  
Lihua Zhou ◽  
Chunli Yang ◽  
Jing Wen ◽  
Peng Fu ◽  
Yaping Zhang ◽  
...  
Keyword(s):  
Microbial Fuel Cells ◽  
Reduction Reaction ◽  
Soft Template ◽  
Hollow Nanospheres ◽  
Carbon Nanospheres ◽  
Pyrolysis Method ◽  
Hollow Carbon ◽  
Template Assisted Synthesis ◽  
Co Doped ◽  
Poly Aniline

Fe and N-co-doped hollow carbon nanospheres have been fabricated via a simple pyrolysis method using poly(aniline-co-pyrrole) copolymer hollow nanospheres as precursors. The resulting catalyst displayed potential application as a cathode in a MFC.

Boosting rate capability of ionic liquid supercapacitors by copolymer-derived activated hollow carbon nanospheres

2020 ◽  
Vol 10 (11) ◽  
pp. 1925-1931
Author(s):  
Hongquan Gao ◽  
Guijiang Xu ◽  
Dong Zhang ◽  
Haitao Zhou ◽  
Jianchun Wu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Hollow Structure ◽  
Rate Capability ◽  
Koh Activation ◽  
Hollow Nanospheres ◽  
Carbon Nanospheres ◽  
Potential Value ◽  
Hollow Carbon ◽  
Poly Aniline

Herein, a novel activated hollow carbon nanospheres (AHCNSs) with enlarged specific surface area (SSA) of 1796 m2 ú g-1 and pore volume (Vp) of 1.33 cm3 ú g-1 was synthesized from poly(aniline-co-pyrrole) hollow nanospheres via KOH activation method. The supercapacitor containing AHCNSs displayed high gravimetric capacitance (Cg) of 290 F ú g-1 at 1 Aú g-1 and 79% capacitance retention even at 20 Aú g-1 in ionic liquid EMIMBF4, indicating its excellent rate capability. This study highlights the potential value of novel hollow structure activated carbon in the field of energy storage.

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.

N and S Co-doped Ordered Mesoporous Carbon: An Efficient Electrocatalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

2020 ◽  
Vol 16 (4) ◽  
pp. 625-638
Author(s):  
Leila Samiee ◽  
Sedigheh Sadegh Hassani
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Carbon Substrate ◽  
Promising Candidate ◽  
X Ray ◽  
Carbon Framework ◽  
Co Doped

Background: Porous carbon materials are promising candidate supports for various applications. In a number of these applications, doping of the carbon framework with heteroatoms provides a facile route to readily tune the carbon properties. The oxygen reduction reaction (ORR), where the reaction can be catalyzed without precious metals is one of the common applications for the heteroatom-doped carbons. Therefore, heteroatom doped catalysts might have a promising potential as a cathode in Microbial fuel cells (MFCs). MFCs have a good potential to produce electricity from biological oxidization of wastes at the anode and chemical reduction at the cathode. To the best of our knowledge, no studies have been yet reported on utilizing Sulfur trioxide pyridine (STP) and CMK-3 for the preparation of (N and S) doped ordered porous carbon materials. The presence of highly ordered mesostructured and the synergistic effect of N and S atoms with specific structures enhance the oxygen adsorption due to improving the electrocatalytic activity. So the optimal catalyst, with significant stability and excellent tolerance of methanol crossover can be a promising candidate for even other storage and conversion devices. Methods: The physico-chemical properties of the prepared samples were determined by Small Angle X-ray Diffraction (SAXRD), N2 sorption-desorption, Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy (FESEM) and X-ray Photoelectron Spectroscopy (XPS). The prepared samples were further applied for oxygen reduction reaction (ORR) and the optimal cathode was tested with the Microbial Fuel Cell (MFC) system. Furthermore, according to structural analysis, The HRTEM, and SAXRD results confirmed the formation of well-ordered hexagonal (p6mm) arrays of mesopores in the direction of (100). The EDS and XPS approved that N and S were successfully doped into the CMK-3 carbon framework. Results: Among all the studied CMK-3 based catalysts, the catalyst prepared by STP precursor and pyrolysis at 900°C exhibited the highest ORR activity with the onset potential of 1.02 V vs. RHE and 4 electron transfer number per oxygen molecule in 0.1 M KOH. The high catalyst durability and fuel-crossover tolerance led to stable performance of the optimal cathode after 5000 s operation, while the Pt/C cathode-based was considerably degraded. Finally, the MFC system with the optimal cathode displayed 43.9 mW·m-2 peak power density showing even reasonable performance in comparison to a Pt/C 20 wt.%.cathode. Conclusions: The results revealed that the synergistic effect of nitrogen and sulfur co-doped on the carbon substrate structure leads to improvement in catalytic activity. Also, it was clearly observed that the porous structure and order level of the carbon substrate could considerably change the ORR performance.

Nitrogen and Sulfur Co-Doped Hollow Carbon Nanospheres Derived from Surface-Attached Polyelectrolyte Monolayers

2018 ◽  
Vol 3 (11) ◽  
pp. 3006-3013 ◽  
Author(s):  
Junbo Wang ◽  
Xiaofeng Li ◽  
Meiling Fan ◽  
Haining Zhang ◽  
Wenmao Tu
Keyword(s):  
Carbon Nanospheres ◽  
Hollow Carbon ◽  
Co Doped

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 Metallic Organic Framework-Derived Fe, N, S co-doped Carbon as a Robust Catalyst for the Oxygen Reduction Reaction in Microbial Fuel Cells

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3846 ◽  
Author(s):  
Xiao Luo ◽  
Wuli Han ◽  
Han Ren ◽  
Qingzuo Zhuang
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Active Sites ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
X Ray ◽  
Co Doped ◽  
Organic Framework

Oxygen reduction reaction (ORR) provides a vital role for microbial fuel cells (MFCs) due to its slow reaction kinetics compared with the anodic oxidation reaction. How to develop new materials with low cost, high efficacy, and eco-friendliness which could replace platinum-based electrocatalysis is a challenge that we have to resolve. In this work, we accomplished this successfully by means of a facile strategy to synthesize a metallic organic framework-derived Fe, N, S co-doped carbon with FeS as the main phase. The Fe/S@N/C-0.5 catalyst demonstrated outstandingly enhanced ORR activity in neutral PBS and alkaline media, compared to that of commercial 20% Pt-C catalyst. Here, we started-up and operated two parallel single-chamber microbial fuel cells of an air cathode, and those cathode catalysts were Fe/S@N/C-0.5 and commercial Pt-C (20% Pt), respectively. Scanning electron microscopy (SEM) elaborated that the Fe/S@N/C-0.5 composite did not change the polyhedron morphology of ZIF-8. According to X-ray diffractometry(XRD) curves, the main crystal phase of the resulted Fe/S@N/C-0.5 was FeS. The chemical environment of N, S, and Fe which are anticipated to be the high-efficiency active sites of ORR for MFCs were investigated by X-ray photoelectron spectroscopic(XPS). Nitrogen adsorption/desorption techniques were used to calculate the pore diameter distribution. In brief, the obtained Fe/S@N/C-0.5 material exhibited a pronounced reduction potential at 0.861 V (versus Reversible Hydrogen Electrode(RHE)) in 0.1M KOH solution and –0.03 V (vs. SCE) in the PBS solution, which both outperform the benchmark platinum-based catalysts. Fe/S@N/C-0.5-MFC had a higher Open Circuit Voltage(OCV) (0.71 V), stronger maximum power density (1196 mW/m2), and larger output voltage (0.47 V) than the Pt/C-MFC under the same conditions.

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.

Preparation and Characterization of Hollow Carbon Nanospheres Supported Metallic Catalysts by Using One-Step Pyrolysis Method

2008 ◽  
Vol 8 (3) ◽  
pp. 1512-1517
Author(s):  
Ya Ding ◽  
Xing-Hua Xia
Keyword(s):  
Metallic Nanoparticles ◽  
Metal Salt ◽  
Average Diameter ◽  
Pt Catalyst ◽  
Metallic Nanoparticle ◽  
Carbon Nanospheres ◽  
Adsorption Sites ◽  
Pyrolysis Method ◽  
One Step ◽  
Hollow Carbon

A versatile one-step pyrolysis method is successfully employed to fabricate hollow carbon nanospheres (HCNs, ca. 60 nm in diameter) supported with metallic nanoparticle catalyst. The resultant catalyst hybrid was characterized by using TEM, FTIR, TGA measurements. It is confirmed that, as the carbon precursor and hollow core/shell structure template, hollow chitosan nanospheres provide the important adsorption sites for the metallic precursor. The one-step pyrolysis process at 750 °C under nitrogen atmosphere results in the simultaneous decomposition of the chitosan nanospheres to HCNs and the adsorbed metal salt complex to metallic nanoparticles. It is found that metallic nanoparticles with an average diameter of ca. 4 nm highly dispersed in the carbon shell of HCNs, and no aggregation phenomenon occurs under the high deposition temperature. As a demonstration, the HCNs-supported Pt catalyst for the electrochemical methanol oxidation was studied.

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