Nitrogen and sulphur co-doped crumbled graphene for the oxygen reduction reaction with improved activity and stability in acidic medium

2016 ◽  
Vol 4 (16) ◽  
pp. 6014-6020 ◽  
Author(s):  
Siddheshwar N. Bhange ◽  
Sreekuttan M. Unni ◽  
Sreekumar Kurungot
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Acidic Medium ◽  
Active Sites ◽  
Reduction Reaction ◽  
Acidic Conditions ◽  
Co Doped

A crumbled graphene structure with heteroatom doped active sites derived through the pyrolysis of polyethylenedioxythiophene served as an efficient platinum-free electrocatalyst for oxygen reduction under acidic conditions.

Phosphor and nitrogen co-doped rutile TiO2 covered on TiN for oxygen reduction reaction in acidic media

2019 ◽  
Vol 9 (3) ◽  
pp. 611-619 ◽  
Author(s):  
Mitsuharu Chisaka ◽  
Hiroyuki Morioka
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Reduction Reaction ◽  
Acidic Media ◽  
Rutile Tio2 ◽  
Co Doped

Phosphor and nitrogen atoms were co-doped into rutile TiO2 phase on TiN to produce new active sites for oxygen reduction reaction.

Highly Exposed Active Sites of Fe/N Co‐doped Defect‐rich Graphene as an Efficient Electrocatalyst for Oxygen Reduction Reaction

2020 ◽  
Vol 15 (21) ◽  
pp. 3527-3534
Author(s):  
Tingwei Zhang ◽  
Zhongfang Li ◽  
Likai Wang ◽  
Shenzhi Zhang ◽  
Yuepeng Liu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Reduction Reaction ◽  
Co Doped

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.

scholarly journals Bimetallic carbide of Co3W3C enhanced non-noble-metal catalysts with high activity and stability for acidic oxygen reduction reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 12292-12299 ◽  
Author(s):  
Bolin Li ◽  
Jianmin Zhou ◽  
Ling Zhang ◽  
Zesheng Li
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Activity ◽  
Noble Metal ◽  
Acidic Medium ◽  
Reduction Reaction ◽  
Metal Catalysts ◽  
Noble Metal Catalysts ◽  
Co Doped

Bimetallic carbide enhanced nitrogen/phosphor co-doped graphite (Co3W3C/NPG) with high performances were first demonstrated for oxygen reduction reaction in acidic medium.

Dual-modulation of electronic structure and active sites of PtCu nanodendrites by surface nitridation to achieve efficient methanol electrooxidation and oxygen reduction reaction

2020 ◽  
Vol 56 (52) ◽  
pp. 7136-7139
Author(s):  
TianShan Song ◽  
Hui Xue ◽  
NianKun Guo ◽  
Jing Sun ◽  
Ling Qin ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Acidic Medium ◽  
Active Sites ◽  
Reduction Reaction ◽  
Methanol Electrooxidation ◽  
Surface Modifier ◽  
Electrocatalytic Performance

A facile method to prepare PtCu nanodendrites rich in multiple active sites was reported using pyridine as a surface modifier. They exhibit outstanding electrocatalytic performance towards ORR and MOR in acidic medium.

scholarly journals Facilitating the acidic oxygen reduction of Fe-N-C catalysts by fluorine-doping

2021 ◽  
Author(s):  
Xiafang Tao ◽  
Ruihu Lu ◽  
Lingmei Ni ◽  
Vladislav Gridin ◽  
Samir Al-Hilfi ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Reduction Reaction ◽  
Fluorine Doping ◽  
Carbon Catalysts ◽  
Co Doped

As the alternatives of expensive Pt-based materials for the oxygen reduction reaction (ORR), iron/nitrogen co-doped carbon catalysts (FeNC) with dense FeNx active sites are promising candidates to promote the commercialization...

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