Durability of template-free Fe-N-C foams for electrochemical oxygen reduction in alkaline solution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389379" target="_blank" >RIV/00216208:11320/18:10389379 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jpowsour.2017.07.025" target="_blank" >https://doi.org/10.1016/j.jpowsour.2017.07.025</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpowsour.2017.07.025" target="_blank" >10.1016/j.jpowsour.2017.07.025</a>

Result language
angličtina
Original language name
Durability of template-free Fe-N-C foams for electrochemical oxygen reduction in alkaline solution
Original language description
Due to the high cost and limited availability of platinum, the development of non-platinum-group metals (non-PGM) catalysts is of paramount importance. A promising alternative to Pt are Fe-N-C-based materials. Here we present the synthesis, characterization and electrochemistry of a template-free nitrogen doped carbon foam, impregnated with iron. This low-cost and gram-scale method results in materials with micron-scale pore size and large surface area (1600 m(2)g(-1)). When applied as an oxygen reduction reaction (ORR) electrocatalyst in alkaline solution, the Fe-N-C foams display extremely high initial activity, slightly out-performing commercially available non-PGM catalysts (NCP-2000, Pajarito Powder). The load-cycle durability in alkaline solution is investigated, and the performance steadily degrades over 60,000 potential cycles, whilst the commercial catalyst is remarkably stable. The post-operation catalyst microstructure is elucidated by transmission electron microscopy (TEM), to provide insight into the degradation processes. The resulting images suggest that potential cycling leads to leaching of atomically dispersed Fe-N-2/4 sites in all the catalysts, whereas encapsulated iron nanoparticles are protected.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
<a href="/en/project/LM2015057" target="_blank" >LM2015057: Surface Physics Laboratory – Materials Science Beamline</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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