Nitrogen and fluorine dual-doped carbon black as an efficient cathode catalyst for oxygen reduction reaction in neutral medium

2016 ◽  
Vol 1 (4) ◽  
pp. 696-702 ◽  
Author(s):  
Xinfang Zhang ◽  
Yangbo Chen ◽  
Juan Wang ◽  
Qin Zhong
Keyword(s):  
Carbon Black ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Neutral Medium ◽  
Cathode Catalyst

Carbon-Supported Spinel Nanoparticle MnCo2O4 as a Cathode Catalyst towards Oxygen Reduction Reaction in Dual-Chamber Microbial Fuel Cell

2015 ◽  
Vol 68 (6) ◽  
pp. 987 ◽  
Author(s):  
Dengping Hu ◽  
Guangyao Zhang ◽  
Juan Wang ◽  
Qin Zhong
Keyword(s):  
Carbon Black ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Coupling Effect ◽  
Reaction Pathway ◽  
Reduction Reaction ◽  
Cathode Catalyst ◽  
Dual Chamber

The poor kinetics of oxygen reduction reaction (ORR) in neutral media and ambient temperature limit the performance of microbial fuel cells (MFCs). So higher-performing, low-cost oxygen reduction catalysts play a key role in power output. Through direct nanoparticle nucleation and growth on carbon black, a nanocomposite of manganese cobaltite and carbon black (in situ-MnCo2O4/C) was synthesized via a facile hydrothermal method. Subsequently, the in situ-MnCo2O4/C samples were characterized. The results show that the MnCo2O4 nanoparticles with a crystalline spinel structure are well dispersed on carbon black. Electrochemical measurements reveal that in situ-MnCo2O4/C demonstrates excellent ORR catalytic activity, which may account for the synergetic coupling effect between MnCo2O4 and carbon black. The ORR on as-prepared in situ-MnCo2O4/C hybrid mainly favours a direct 4-electron reaction pathway in alkaline solution. Moreover, in situ-MnCo2O4/C was used as an alternative catalyst for ORR in dual-chamber MFC. The obtained maximum power density is 545 mW m–2, which is far higher than that of the plain cathode (Pmax = 214 mW m–2) and slightly lower than that of commercial Pt/C catalyst (Pmax = 689 mW m–2). This study implies that in situ-MnCo2O4/C nanocomposite is an efficient and cost-effective cathode catalyst for practical MFC application.

Tuning the morphology of CeO2 nanostructures using a template-free solvothermal process and their oxygen reduction reaction activity

2020 ◽  
Vol 49 (48) ◽  
pp. 17594-17604
Author(s):  
Debanjali Ghosh ◽  
Shaikh Parwaiz ◽  
Paritosh Mohanty ◽  
Debabrata Pradhan
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Cathode Catalyst ◽  
Solvothermal Process ◽  
Oxygen Reduction Reaction Activity ◽  
Template Free

Solvothermally synthesized diverse shaped CeO2 nanostructures show excellent oxygen reduction reaction activity, suitable as a cathode catalyst in fuel cell.

Application of Low-Cost Transition Metal Based Co0.5Zn0.5Fe2O4 as Oxygen Reduction Reaction Catalyst for Improving Performance of Microbial Fuel Cell

MRS Advances ◽  
2018 ◽  
Vol 3 (53) ◽  
pp. 3171-3179 ◽  
Author(s):  
Indrasis Das ◽  
Md. T. Noori ◽  
Gourav Dhar Bhowmick ◽  
M.M. Ghangrekar
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Low Cost ◽  
Reduction Reaction ◽  
Current Response ◽  
Cathode Catalyst ◽  
Cathodic Current ◽  
Transfer Resistance

ABSTRACTOverpotential losses on cathode during oxygen reduction reaction (ORR) causes serious performance depletion in microbial fuel cells (MFCs). High cost of existing platinum based noble catalysts is one of the main reason for growing interest in the research of low cost sustainable cathode catalysts to improve ORR in order to enhance power generation from MFCs. The present study demonstrates application of low-cost bimetallic ferrite, Co0.5Zn0.5Fe2O4, as a cathode catalyst in MFC. The electrochemical tests of cathode having this catalyst revealed an excellent cathodic current response of 25.76 mA with less charge transfer resistance of 0.7 mΩ, showing remarkable catalytic activity. The MFC using this catalyst on cathode could generate a power density of 172.1 ± 5.2 mW/m2, which was found to be about 10 times higher than the power density of 15.2 ± 1.3 mW/m2 obtained from a MFC using only acetelyne black (AB) on cathode and noted even higher than the power density produced by MFC with Pt/C cathode (151.3 ± 2.8 mW/m2). In addition, the wastewater treatment in terms of chemical oxygen demand (COD) removal efficiency of MFC with Co0.5Zn0.5Fe2O4 on cathode was found to be better (87 %) among the tested MFCs. Hence, the results obtained from this study illustrates the applicability of Co0.5Zn0.5Fe2O4 as an excellent and suitable cathode catalyst for scaling up of MFCs.

CeO2 doped Pt/C as an efficient cathode catalyst for an air-cathode single-chamber microbial fuel cell

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 25877-25881 ◽  
Author(s):  
Ling Li ◽  
Mingkun Wang ◽  
Ning Cui ◽  
Yuedi Ding ◽  
Qingling Feng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cell ◽  
Reduction Reaction ◽  
Cathode Catalyst ◽  
Air Cathode ◽  
Single Chamber ◽  
Cathode Catalysts ◽  
First Time

Incorporation of nanophase ceria into the cathode catalyst Pt/C was used as alternative cathode catalysts for the oxygen reduction reaction in an air-cathode single-chamber microbial fuel cell (SCMFC) for the first time.

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