Binder‐Free N‐Functionalized Carbon Electrodes for Oxygen Evolution Reaction
ChemElectroChem, vol. 10
Abstract
Abstract The oxygen evolution reaction (OER) is one of the bottlenecks of electrochemical water splitting. Metal‐free carbons from biomass are highly abundant and can be easily synthesized. Their low price, high conductivity and functionalization makes them promising materials. Herein, we report about free‐standing carbon electrodes as electrocatalysts for the OER. In contrast to powder‐based catalysts, free‐standing electrodes not only avoid additives, but also facilitate post analysis and better reflect industrial conditions. Here, the performance of pure carbon electrodes is compared to those of N‐functionalized ones. Utilizing several analytical techniques, the difference in performance can be rationalized by physical properties. Especially, the analysis of the gaseous products is shown to be of crucial importance. It reveals that N‐doped carbons generate more oxygen and are more robust against carbon corrosion. This illustrates the importance of measuring selectivity especially for carbon electrocatalysts, as higher currents do not necessarily result in higher catalytic activity.
Authors 7
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Max Planck Institute for Chemical Energy Conversion
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
These authors contributed equally
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University of Hohenheim · Max Planck Institute for Chemical Energy Conversion
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
current address: Universität Hohenheim Institut für Agrartechnik (440 f) Garbenstr. 9 70599 Stuttgart Germany
These authors contributed equally
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Chinese Academy of Sciences · Max Planck Institute for Chemical Energy Conversion · Fujian Institute of Research on the Structure of Matter
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
current address: Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R.China
current address: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P. R.China
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Lanzhou Institute of Chemical Physics · Max Planck Institute for Chemical Energy Conversion
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
current adress Lanzhou Institute of Chemical Physics Tianshui Middle Road 18 730000 Lanzhou P. R. China
current adress, Lanzhou Institute of Chemical Physics, Tianshui Middle Road 18, 730000 Lanzhou, P. R. China
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Fritz Haber Institute of the Max Planck Society · Max Planck Institute for Chemical Energy Conversion
Affiliation as printed
Fritz-Haber-Institute of the Max Planck Society Faradayweg 4–6 14195 Berlin Germany
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
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Saskia Heumann corresponding
Max Planck Institute for Chemical Energy Conversion
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
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Max Planck Institute for Chemical Energy Conversion · RWTH Aachen University
Affiliation as printed
Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
current address: RWTH Aachen University Electrochemical Reaction Engineering Forckenbeckstraße 51 52074 Aachen Germany
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