Document Detail

Catalysis Kinetics and Porous Analysis of Rolling Activated Carbon-PTFE Air-cathode in Microbial Fuel Cells.
MedLine Citation:
PMID:  23151092     Owner:  NLM     Status:  Publisher    
Microbial fuel cells (MFCs) being an environment-friendly technology for wastewater treatment is limited by its low efficiency and high cost. Power output based on capital cost had been greatly increased in our previous work by introducing a novel activated carbon (AC) air-cathode (ACAC). The catalysis behavior of this ACAC was studied here based on catalysis kinetics and pore analysis of both carbon powders and catalyst layers (CLs). Plain AC (AC1#), ultracapacitor AC (AC2#) and non-AC (XC-72) powders were used as catalysts. The electron transfer number (n) of oxygen reduction reaction (ORR) with CLs increased by 5 ~ 23 % compared to those n values of corresponding carbon powders before rolled to CLs with PTFE, while the n value of Pt/C decreased by 38 % when it was brushed with Nafion as the CL, indicating that rolling procedure with PTFE binder substantially increased the catalytic activity of carbon catalysts. 2 ~ 4 times larger in micropore area of AC powders than that of non-AC powder resulted in 1.3 ~ 1.9 times increase in power density of MFCs. In addition, more uniform distribution of microporosity was found in AC1# than in AC2#, which could be the reason of the 25 % increase in power density of ACAC1# (1355±26 mW•m-2) than 1086±8 mW•m-2 of ACAC2#.
Heng Dong; Hongbing Yu; Xin Wang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-14
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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