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  Preparation and functionalization of free-standing nitrogen-doped carbon-based catalyst electrodes for electrocatalytic N2 fixation

Qin, Q., Brandi, F., Badamdorj, B., Oschatz, M., & Al-Naji, M. (2021). Preparation and functionalization of free-standing nitrogen-doped carbon-based catalyst electrodes for electrocatalytic N2 fixation. Molecular Catalysis, 515: 111935. doi:10.1016/j.mcat.2021.111935.

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 Creators:
Qin, Qing1, Author              
Brandi, Francesco2, Author              
Badamdorj, Bolortuya3, Author              
Oschatz, Martin1, Author              
Al-Naji, Majd2, Author              
Affiliations:
1Martin Oschatz, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2364733              
2Majd Al-Naji, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3050472              
3Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              

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Free keywords: N-doped porous carbon; Free-standing electrode; Electrocatalysis; N2 fixation
 Abstract: Nitrogen-doped carbon-based materials have been recently explored as promising electrocatalysts for N2 fixation. Herein, a nitrogen-doped carbon film as a self-standing electrode is synthesized through a novel and scalable strategy. After the film synthesis, a thin layer of Au nanoparticles is deposited, significantly enhancing the performance of such films in electrocatalytic N2 reduction. Owing to the exposed active sites and unique free-standing structure, it shows desirable performance towards electrochemical N2 fixation with a high Faradaic efficiency of 6.4 %, and a NH3 production rate of 18.3 μg h−1 cm−2 at a low given potential of -0.05 V vs. reversible hydrogen electrode. Such performance is superior in comparison with Au-nanoparticles-modified nitrogen-doped carbon powder. Further comparison of nitrogen-doped carbon film and nitrogen-doped carbon powder also demonstrates the benefits of the free-standing structure in comparison to film-based materials in terms of charge transfer and active sites per electrode surface area.

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Language(s): eng - English
 Dates: 2021-10-092021
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.mcat.2021.111935
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Title: Molecular Catalysis
  Abbreviation : Mol. Catal.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 515 Sequence Number: 111935 Start / End Page: - Identifier: ISSN: 2468-8231