Edge-iodine/sulfonic acid-functionalized graphene nanoplatelets as efficient electrocatalysts for oxygen reduction reaction

2014 ◽  
Vol 2 (23) ◽  
pp. 8690-8695 ◽  
Author(s):  
Jong Yeol Baek ◽  
In-Yup Jeon ◽  
Jong-Beom Baek
Keyword(s):  
Oxygen Reduction Reaction ◽  
Ball Milling ◽  
Electrocatalytic Activity ◽  
Sulfonic Acid ◽  
Sulfur Trioxide ◽  
Reduction Reaction ◽  
Graphene Nanoplatelets ◽  
Functionalized Graphene ◽  
Cycle Stability ◽  
Polar Solvents

Edge-iodine/sulfonic acid-functionalized graphene nanoplatelets (ISGnPs) were prepared by two-step sequential ball-milling of graphite in the presence of iodine and sulfur trioxide. The resultant ISGnPs are highly dispersible in various polar solvents and the ORR performance of ISGnPs in an alkaline medium is superior to commercial Pt/C in terms of electrocatalytic activity and cycle stability.

scholarly journals Oxygen Reduction Reaction of Carbon Nanotubes Supported Polypyrrole Doped Toluene Sulfonic Acid in Alkaline Medium

2019 ◽  
Vol 7 (4.14) ◽  
pp. 473
Author(s):  
Rika Sri Utami ◽  
Wai Yin Wong ◽  
Edy Herianto Majlan ◽  
Kee Shyuan Loh
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Sulfonic Acid ◽  
Oxidative Polymerization ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Alkaline Condition ◽  
X Ray ◽  
Toluene Sulfonic Acid

In this study, polypyrrole/toluene sulfonic acid-based nitrogen doped carbon nanotube (NCNT) is synthesized via chemical oxidative polymerization followed by high-temperature heat treatment under N2 atmosphere. The structure, morphology and composition of the NCNT catalyst are investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy. Different N species including pyridinic, pyrrolic, graphitic, and oxidized-N are quantitatively determined by X-ray photoelectron spectroscopy (XPS). The electrocatalytic activity of NCNT towards oxygen reduction reaction (ORR) in alkaline condition is evaluated with cyclic voltammetry (CV) and rotating disk electrode (RDE). The globular and tubular structure of NCNT can be clearly seen from SEM images. The typical Raman spectrum for NCNT showed two prominent bands around 1348 cm-1 (D band) and 1568 cm-1 (G band). High-resolution XPS spectrum of N 1s for NCNT showed that graphitic-N has the highest percentage (39.36%), whereas the pyridinic-N (26.54%), pyrrolic-N (18.88%) and oxidized-N (15.22%). The ORR electrocatalytic activity of the NCNT in 0.1 M KOH has the onset potential of -0.154 V vs. Ag/AgCl, the current density 0.455 mA/cm2, and electron transfer number of n ≈ 4.  

Directly bonded hybrid of graphene nanoplatelets and fullerene: facile solid-state mechanochemical synthesis and application as carbon-based electrocatalyst for oxygen reduction reaction

2015 ◽  
Vol 3 (8) ◽  
pp. 4139-4146 ◽  
Author(s):  
Jian Guan ◽  
Xiang Chen ◽  
Tao Wei ◽  
Fupin Liu ◽  
Song Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Reduction Reaction ◽  
Graphene Nanoplatelets ◽  
Mechanochemical Method ◽  
Carbon Based

The first directly bonded hybrid of graphene nanoplatelets and C60 is successfully synthesized using a facile solid-state mechanochemical method via ball milling with LiOH as a catalyst.

Tailoring molecular architectures of Fe phthalocyanine on nanocarbon supports for high oxygen reduction performance

2015 ◽  
Vol 3 (18) ◽  
pp. 10013-10019 ◽  
Author(s):  
Shiming Zhang ◽  
Heyou Zhang ◽  
Xing Hua ◽  
Shengli Chen
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Alkaline Solution ◽  
Electrocatalytic Activity ◽  
Reduction Reaction ◽  
High Oxygen ◽  
Molecular Architectures

Tailored molecular architectures of FePc on nanocarbon supports from nanorods to uniform shells exhibit excellent electrocatalytic activity for the oxygen reduction reaction in alkaline solution.

Facile preparation of N-doped mesocellular graphene foam from sludge flocs for highly efficient oxygen reduction reaction

2015 ◽  
Vol 3 (29) ◽  
pp. 15171-15176 ◽  
Author(s):  
Daixin Ye ◽  
Li Wang ◽  
Ren Zhang ◽  
Baohong Liu ◽  
Yi Wang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Electrocatalytic Activity ◽  
Reduction Reaction ◽  
Methanol Tolerance ◽  
High Quality ◽  
Graphene Foam ◽  
Sludge Flocs ◽  
Pyrolysis Method ◽  
One Step ◽  
Facile Preparation

Sludge flocs (SF) from environmental waste were used to prepare high-quality N-doped mesocellular graphene foam (SF-NMGF)viaa simple one-step pyrolysis method. The SF-NMGF had a high electrocatalytic activity, operational stability and methanol-tolerance in the ORR.

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