Pomelo peel-derived, N-doped biochar microspheres as an efficient and durable metal-free ORR catalyst in microbial fuel cells

2020 ◽  
Vol 4 (4) ◽  
pp. 1642-1653 ◽  
Author(s):  
Yuyuan Zhang ◽  
Lifang Deng ◽  
Huawen Hu ◽  
Yu Qiao ◽  
Haoran Yuan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Noble Metal ◽  
Electrocatalytic Activity ◽  
Microbial Fuel Cells ◽  
Free Carbon ◽  
Metal Free ◽  
Pomelo Peel ◽  
Carbon Based

Naturally abundant pomelo peels were explored for the preparation of the metal-free carbon-based microspheres with high electrocatalytic activity and long-term durability toward ORR, holding potential for replacing noble metal-based catalysts.

Studies on noble metal-free carbon-based cathodes for magnesium–hydrogen peroxide fuel cells

Ionics ◽  
2015 ◽  
Vol 21 (9) ◽  
pp. 2603-2607 ◽  
Author(s):  
K. Naga Mahesh ◽  
R. Balaji ◽  
K. S. Dhathathreyan
Keyword(s):  
Hydrogen Peroxide ◽  
Fuel Cells ◽  
Noble Metal ◽  
Free Carbon ◽  
Metal Free ◽  
Carbon Based

scholarly journals Improving the Performance of Microbial Fuel Cells with Modified Carbon Aerogel Based Cathode Catalysts

2021 ◽  
Author(s):  
Bálint Lóránt ◽  
Krisztina László ◽  
Gábor Márk Tardy
Keyword(s):  
Graphene Oxide ◽  
Fuel Cells ◽  
Noble Metal ◽  
Microbial Fuel Cells ◽  
Carbon Aerogel ◽  
Carbon Powder ◽  
Carbon Cloth ◽  
Cathode Catalysts ◽  
Metal Free ◽  
Co Doping

Microbial fuel cells (MFCs) are capable of converting the chemical energy of biodegradable organic matter directly into electricity, thus they can be applied in various fields: waste elimination, biosensor industry and production of renewable energy. In this study, the efficiency of noble metal free carbon aerogel based cathode catalysts was investigated and compared to plain glassy carbon cloth without catalyst (CC ) and platinum containing carbon powder catalyst ( PtC ) in H-type MFCs. Surface extension by carbon aerogel (CA ) enhanced the maximum power density by 34 % compared to CC, to 14.1 W m−3. With nitrogen doped carbon aerogel (NCA) the performance was further increased to 15.7 W m−3. Co-doping the resorcinol-melamine-formaldehyde based aerogel with graphene oxide (GNCA) resulted in an additional power increase of 70 %, indicating that the electrocatalytic activity of NCAs can be considerably improved by co-doping with graphene oxide. Although the performance of GNCA remained below that of PtC (50.2 W m−3) in our investigations, it can be concluded that GNCA based coatings may provide a noble metal free, and therefore competitive and sustainable alternatives for cathode catalysis in MFC based technologies.

Polyelectrolyte–single wall carbon nanotube composite as an effective cathode catalyst for air-cathode microbial fuel cells

2014 ◽  
Vol 70 (10) ◽  
pp. 1610-1616 ◽  
Author(s):  
Huanan Wu ◽  
Min Lu ◽  
Lin Guo ◽  
Leonard Guan Hong Bay ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Carbon Nanotube ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Reduction Process ◽  
Air Cathode ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Cathode Catalysts ◽  
Metal Free

Polyelectrolyte–single wall carbon nanotube (SCNT) composites are prepared by a solution-based method and used as metal-free cathode catalysts for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). In this study, two types of polyelectrolytes, polydiallyldimethylammonium chloride (PDDA) and poly[bis(2-chloroethyl)ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] (PEPU) are applied to decorate the SCNTs and the resulting catalysts exhibit remarkable catalytic ability toward ORR in MFC applications. The enhanced catalytic ability could be attributed to the positively charged quaternary ammonium sites of polyelectrolytes, which increase the oxygen affinity of SCNTs and reduce activation energy in the oxygen reduction process. It is also found that PEPU–SCNT composite-based MFCs show efficient performance with maximum power density of 270.1 mW m−2, comparable to MFCs with the benchmark Pt/C catalyst (375.3 mW m−2), while PDDA–SCNT composite-based MFCs produce 188.9 mW m−2. These results indicate that PEPU–SCNT and PDDA–SCNT catalysts are promising candidates as metal-free cathode catalysts for ORR in MFCs and could facilitate MFC scaling up and commercialization.

scholarly journals Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

2017 ◽  
Vol 366 ◽  
pp. 18-26 ◽  
Author(s):  
Mounika Kodali ◽  
Carlo Santoro ◽  
Sergio Herrera ◽  
Alexey Serov ◽  
Plamen Atanassov
Keyword(s):  
Fuel Cells ◽  
High Power ◽  
Microbial Fuel Cells ◽  
Platinum Group Metal ◽  
Metal Free ◽  
Group Metal ◽  
Platinum Group
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