scholarly journals Fine tuning of the catalytic effect of a metal-free porphyrin on the homogeneous oxygen reduction

2011 ◽  
Vol 47 (19) ◽  
pp. 5446 ◽  
Author(s):  
Antonín Trojánek ◽  
Jan Langmaier ◽  
Jakub Šebera ◽  
Stanislav Záliš ◽  
Jean-Michel Barbe ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Catalytic Effect ◽  
Fine Tuning ◽  
Metal Free

scholarly journals Tailored ionic liquid for metal-free carbons toward oxygen reduction reaction

Carbon Trends ◽  
2021 ◽  
Vol 3 ◽  
pp. 100038
Author(s):  
Jian Gao ◽  
Xiujuan Chu ◽  
Xiaoyao Tan ◽  
Hongqi Sun ◽  
Zhen Yin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Metal Free

Monovacancy Coupled Pyridinic N Site Enables Surging Oxygen Reduction Activity of Metal-Free CNx Catalyst

2021 ◽  
Vol 9 (3) ◽  
pp. 1264-1271
Author(s):  
Zhenzhen Duan ◽  
Guokang Han ◽  
Hua Huo ◽  
Zeyu Lin ◽  
Liping Ge ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Metal Free ◽  
Reduction Activity ◽  
Pyridinic N

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.

Novel honeycomb-like carbons with tunable nanopores as metal-free N, O-codoped catalysts for robust oxygen reduction

2021 ◽  
pp. 133560
Author(s):  
Yan Liu ◽  
Kunyang Zou ◽  
Tao Zhang ◽  
Xin Dai ◽  
Shixiu Cao ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Metal Free
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