Oxygen Reduction Reaction Electrocatalysts Derived from Iron Salt and Benzimidazole and Aminobenzimidazole Precursors and Their Application in Microbial Fuel Cell Cathodes

Oxygen Reduction Reaction Electrocatalysts Derived from Iron Salt and Benzimidazole and Aminobenzimidazole Precursors and Their Application in Microbial Fuel Cell Cathodes

In this work, benzimidazole (BZIM) and aminobenzimidazole (ABZIM) were used as organic-rich in nitrogen precursors during the synthesis of iron–nitrogen–carbon (Fe–N–C) based catalysts by sacrificial support method (SSM) technique. The catalysts obtained, denoted Fe-ABZIM and Fe-BZIM, were character...

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Veröffentlicht in:ACS applied energy materials 2018-10, Vol.1 (10), p.5755-5765, Article acsaem.8b01360
Hauptverfasser: Mecheri, Barbara, Gokhale, Rohan, Santoro, Carlo, Costa de Oliveira, Maida Aysla, D’Epifanio, Alessandra, Licoccia, Silvia, Serov, Alexey, Artyushkova, Kateryna, Atanassov, Plamen
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container_issue 10
container_start_page 5755
container_title ACS applied energy materials
container_volume 1
creator Mecheri, Barbara
Gokhale, Rohan
Santoro, Carlo
Costa de Oliveira, Maida Aysla
D’Epifanio, Alessandra
Licoccia, Silvia
Serov, Alexey
Artyushkova, Kateryna
Atanassov, Plamen
description In this work, benzimidazole (BZIM) and aminobenzimidazole (ABZIM) were used as organic-rich in nitrogen precursors during the synthesis of iron–nitrogen–carbon (Fe–N–C) based catalysts by sacrificial support method (SSM) technique. The catalysts obtained, denoted Fe-ABZIM and Fe-BZIM, were characterized morphologically and chemically through SEM, TEM, and XPS. Moreover, these catalysts were initially tested in rotating ring disk electrode (RRDE) configuration, resulting in similar high electrocatalytic activity toward oxygen reduction reaction (ORR) having low hydrogen peroxide generated (
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The catalysts obtained, denoted Fe-ABZIM and Fe-BZIM, were characterized morphologically and chemically through SEM, TEM, and XPS. Moreover, these catalysts were initially tested in rotating ring disk electrode (RRDE) configuration, resulting in similar high electrocatalytic activity toward oxygen reduction reaction (ORR) having low hydrogen peroxide generated (&lt;3%). The ORR performance was significantly higher compared to activated carbon (AC) that was the control. The catalysts were then integrated into air-breathing (AB) and gas diffusion layer (GDL) cathode electrode and tested in operating microbial fuel cells (MFCs). The presence of Fe–N–C catalysts boosted the power output compared to AC cathode MFC. The AB-type cathode outperformed the GDL type cathode probably because of reduced catalyst layer flooding. The highest performance obtained in this work was 162 ± 3 μWcm–2. Fe-ABZIM and Fe-BZIM had similar performance when incorporated to the same type of cathode configuration. Long-term operations show a decrease up to 50% of the performance in two months operations. 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Energy Mater</addtitle><date>2018-10-22</date><risdate>2018</risdate><volume>1</volume><issue>10</issue><spage>5755</spage><epage>5765</epage><pages>5755-5765</pages><artnum>acsaem.8b01360</artnum><issn>2574-0962</issn><eissn>2574-0962</eissn><abstract>In this work, benzimidazole (BZIM) and aminobenzimidazole (ABZIM) were used as organic-rich in nitrogen precursors during the synthesis of iron–nitrogen–carbon (Fe–N–C) based catalysts by sacrificial support method (SSM) technique. The catalysts obtained, denoted Fe-ABZIM and Fe-BZIM, were characterized morphologically and chemically through SEM, TEM, and XPS. Moreover, these catalysts were initially tested in rotating ring disk electrode (RRDE) configuration, resulting in similar high electrocatalytic activity toward oxygen reduction reaction (ORR) having low hydrogen peroxide generated (&lt;3%). The ORR performance was significantly higher compared to activated carbon (AC) that was the control. 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title Oxygen Reduction Reaction Electrocatalysts Derived from Iron Salt and Benzimidazole and Aminobenzimidazole Precursors and Their Application in Microbial Fuel Cell Cathodes
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