Uniform epitaxial growth of Pt on Fe3O4 nanoparticles; synergetic enhancement to Pt activity for the oxygen reduction reaction

2013 ◽  
Vol 1 (43) ◽  
pp. 13443 ◽  
Author(s):  
Donald A. Robinson ◽  
Keith J. Stevenson
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Epitaxial Growth ◽  
Fe3o4 Nanoparticles ◽  
Reduction Reaction

Fe3O4 nanoparticles encapsulated in single-atom Fe–N–C towards efficient oxygen reduction reaction: Effect of the micro and macro pores

Carbon ◽  
2020 ◽  
Vol 162 ◽  
pp. 245-255 ◽  
Author(s):  
Shuqi Hu ◽  
Wenpeng Ni ◽  
Daihui Yang ◽  
Chao Ma ◽  
Jiaheng Zhang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Fe3o4 Nanoparticles ◽  
Reduction Reaction ◽  
Single Atom

Epitaxial growth of Pd nanoparticles on molybdenum disulfide by sonochemistry and its effects on electrocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47468-47473 ◽  
Author(s):  
Eunjik Lee ◽  
Young-Uk Kwon
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Epitaxial Growth ◽  
Molybdenum Disulfide ◽  
Electrocatalytic Activity ◽  
Pd Nanoparticles ◽  
Reduction Reaction

We report the epitaxial growth of Pd nanoparticles on MoS2 surface and their electrocatalytic activity for oxygen reduction reaction (ORR).

Enriched graphitic N-doped carbon-supported Fe3O4 nanoparticles as efficient electrocatalysts for oxygen reduction reaction

2014 ◽  
Vol 2 (20) ◽  
pp. 7281-7287 ◽  
Author(s):  
Yunhe Su ◽  
Hongliang Jiang ◽  
Yihua Zhu ◽  
Xiaoling Yang ◽  
Jianhua Shen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Fe3o4 Nanoparticles ◽  
Reduction Reaction ◽  
High Catalytic Activity ◽  
Carbonization Process

Via a solvothermal carbonization process, an enriched graphitic N-doped carbon-supported Fe3O4 nanoparticles composite was prepared which exhibits similar high catalytic activity but superior stability to Pt/C for the oxygen reduction reaction.

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.

Single copper sites dispersed on defective TiO2−x as a synergistic oxygen reduction reaction catalyst

2021 ◽  
Vol 154 (3) ◽  
pp. 034705
Author(s):  
Minchan Li ◽  
Ning Qin ◽  
Zongwei Ji ◽  
Qingmeng Gan ◽  
Zhenyu Wang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Copper Sites ◽  
Oxygen Reduction Reaction Catalyst
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