DataVXAdvanced Functional MaterialsPaper
journal article·2018-05

Polyformamidine‐Derived Non‐Noble Metal Electrocatalysts for Efficient Oxygen Reduction Reaction

Laura C. Pardo Pérez, Nastaran Ranjbar Sahraie, Julia Melke, Patrick Elsässer, Detre Teschner, Xing Huang, Ralph Kraehnert, Robin J. White, Stephan Enthaler, Peter Strasser, Anna Fischer

Advanced Functional Materials· Volume 28· Issue 22
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Source abstract

Abstract

Abstract A facile approach for the template‐free synthesis of highly active non‐noble metal based oxygen reduction reaction (ORR) electrocatalysts is presented. Porous Fe−N−C/Fe/Fe3C composite materials are obtained by pyrolysis of defined precursor mixtures of polyformamidine (PFA) and FeCl3 as nitrogen‐rich carbon and iron sources, respectively. Selection of pyrolysis temperature (700–1100 °C) and FeCl3 loading (5–30 wt%) yields materials with differing surface areas, porosity, graphitization degree, nitrogen and iron content, as well as ORR activity. While the ORR activity of Fe‐free materials is limited (i.e., synthesized from pure PFA), a huge increase in activity is observed for catalysts containing Fe, revealing the participation of the metal dopant in the construction of active electrocatalytic sites. Further activity improvement is achieved via acid‐leaching and repeated pyrolysis, a result which is attributed to the creation of new active sites located at the surface of the porous nitrogen‐doped carbon by dissolution of the Fe and Fe3C nanophases. The best performing catalyst, which was synthesized with a low Fe loading (i.e., 5 wt%) and at a pyrolysis temperature of 900 °C, exhibits high activity, excellent H2O selectivity, extended stability, in both basic and acidic media as well as a remarkable tolerance toward methanol.
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Research context

NanomaterialsCompositesCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Chemistry – Inorganic Chemistry Technical University Berlin Straße des 17. Juni 135 10623 Berlin Germany

Institute of Inorganic and Analytical Chemistry Albert‐Ludwigs‐University Freiburg Albertstrasse 21 79104 Freiburg Germany

Institute of Chemistry – Technical Chemistry Technical University Berlin Straße des 17. Juni 135 10623 Berlin Germany

ICGM‐UMR5253‐Equipe AIME Université Montpellier 2 Place Eugène Bataillon‐CC 1502 34095 Montpellier, Cedex 5 France

FMF – Freiburger Materialforschungszentrum Albert‐Ludwigs‐University Freiburg Stefan‐Meier‐Straße 21 79104 Freiburg im Breisgau Germany

Department of Inorganic Chemistry Fritz‐Haber‐Institute der Max‐Planck‐Gesellschaft Faradayweg 4‐6 14195 Berlin Germany

Department of Heterogeneous Reactions Max‐Planck‐Institute for Chemical Energy Conversion Stiftstraße 34‐36 45470 Mülheim an der Ruhr Germany

Sustainable Catalytic Materials Group Hydrogen Technologies Division Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstrasse 2 79110 Freiburg Germany

Department of Chemistry – Inorganic and Applied Chemistry University of Hamburg Martin‐Luther‐King‐Platz 6 D‐20146 Hamburg Germany

Funding

Deutsche Forschungsgemeinschaft · Bundesministerium für Bildung und Forschung · Fraunhofer-Gesellschaft

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