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Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction via Cathodic Biofilm Inhibition in Microbial Fuel Cells.
ACS Appl Mater Interfaces. 2016 Mar 23; 8(11):6992-7002.AA

Abstract

Limitation of the oxygen reduction reaction (ORR) in single-chamber microbial fuel cells (SC-MFCs) is considered an important hurdle in achieving their practical application. The cathodic catalysts faced with a liquid phase are easily primed with the electrolyte, which provides more surface area for bacterial overgrowth, resulting in the difficulty in transporting protons to active sites. Ag/Fe/N/C composites prepared from Ag and Fe-chelated melamine are used as antibacterial ORR catalysts for SC-MFCs. The structure-activity correlations for Ag/Fe/N/C are investigated by tuning the carbonization temperature (600-900 °C) to clarify how the active-constituents of Ag/Fe and N-species influence the antibacterial and ORR activities. A maximum power density of 1791 mW m(-2) is obtained by Ag/Fe/N/C (630 °C), which is far higher than that of Pt/C (1192 mW m(-2)), only having a decline of 16.14% after 90 days of running. The Fe-bonded N and the cooperation of pyridinic N and pyrrolic N in Ag/Fe/N/C contribute equally to the highly catalytic activity toward ORR. The ·OH or O2(-) species originating from the catalysis of O2 can suppress the biofilm growth on Ag/Fe/N/C cathodes. The synergistic effects between the Ag/Fe heterojunction and N-species substantially contribute to the high power output and Coulombic efficiency of Ag/Fe/N/C catalysts. These new antibacterial ORR catalysts show promise for application in MFCs.

Authors+Show Affiliations

Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China. School of Civil Engineering, Heilongjiang Institute of Technology , Harbin 150050, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China. Key Laboratory of Chemical Engineering Process and Technology for High-Efficiency Conversion, College of Heilongjiang Province, Heilongjiang University , Harbin 150080, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China. Key Laboratory of Chemical Engineering Process and Technology for High-Efficiency Conversion, College of Heilongjiang Province, Heilongjiang University , Harbin 150080, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University , Harbin 150080, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26938657

Citation

Dai, Ying, et al. "Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction Via Cathodic Biofilm Inhibition in Microbial Fuel Cells." ACS Applied Materials & Interfaces, vol. 8, no. 11, 2016, pp. 6992-7002.
Dai Y, Chan Y, Jiang B, et al. Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction via Cathodic Biofilm Inhibition in Microbial Fuel Cells. ACS Appl Mater Interfaces. 2016;8(11):6992-7002.
Dai, Y., Chan, Y., Jiang, B., Wang, L., Zou, J., Pan, K., & Fu, H. (2016). Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction via Cathodic Biofilm Inhibition in Microbial Fuel Cells. ACS Applied Materials & Interfaces, 8(11), 6992-7002. https://doi.org/10.1021/acsami.5b11561
Dai Y, et al. Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction Via Cathodic Biofilm Inhibition in Microbial Fuel Cells. ACS Appl Mater Interfaces. 2016 Mar 23;8(11):6992-7002. PubMed PMID: 26938657.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bifunctional Ag/Fe/N/C Catalysts for Enhancing Oxygen Reduction via Cathodic Biofilm Inhibition in Microbial Fuel Cells. AU - Dai,Ying, AU - Chan,Yingzi, AU - Jiang,Baojiang, AU - Wang,Lei, AU - Zou,Jinlong, AU - Pan,Kai, AU - Fu,Honggang, Y1 - 2016/03/09/ PY - 2016/3/4/entrez PY - 2016/3/5/pubmed PY - 2016/12/15/medline KW - biofouling KW - microbial fuel cells KW - nitrogen doping KW - oxygen reduction reaction KW - stability SP - 6992 EP - 7002 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 8 IS - 11 N2 - Limitation of the oxygen reduction reaction (ORR) in single-chamber microbial fuel cells (SC-MFCs) is considered an important hurdle in achieving their practical application. The cathodic catalysts faced with a liquid phase are easily primed with the electrolyte, which provides more surface area for bacterial overgrowth, resulting in the difficulty in transporting protons to active sites. Ag/Fe/N/C composites prepared from Ag and Fe-chelated melamine are used as antibacterial ORR catalysts for SC-MFCs. The structure-activity correlations for Ag/Fe/N/C are investigated by tuning the carbonization temperature (600-900 °C) to clarify how the active-constituents of Ag/Fe and N-species influence the antibacterial and ORR activities. A maximum power density of 1791 mW m(-2) is obtained by Ag/Fe/N/C (630 °C), which is far higher than that of Pt/C (1192 mW m(-2)), only having a decline of 16.14% after 90 days of running. The Fe-bonded N and the cooperation of pyridinic N and pyrrolic N in Ag/Fe/N/C contribute equally to the highly catalytic activity toward ORR. The ·OH or O2(-) species originating from the catalysis of O2 can suppress the biofilm growth on Ag/Fe/N/C cathodes. The synergistic effects between the Ag/Fe heterojunction and N-species substantially contribute to the high power output and Coulombic efficiency of Ag/Fe/N/C catalysts. These new antibacterial ORR catalysts show promise for application in MFCs. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/26938657/Bifunctional_Ag/Fe/N/C_Catalysts_for_Enhancing_Oxygen_Reduction_via_Cathodic_Biofilm_Inhibition_in_Microbial_Fuel_Cells_ L2 - https://doi.org/10.1021/acsami.5b11561 DB - PRIME DP - Unbound Medicine ER -