Angewandte Chemie International EditionVolume 52, Issue 48 p. 12723-12726 Communication The Haber–Bosch Process Revisited: On the Real Structure and Stability of “Ammonia Iron” under Working Conditions† Timur Kandemir, Timur Kandemir Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorDr. Manfred E. Schuster, Dr. Manfred E. Schuster Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorDr. Anatoliy Senyshyn, Dr. Anatoliy Senyshyn Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München, Lichtenbergstrasse 1, 85747 Garching (Germany)Search for more papers by this authorDr. Malte Behrens, Corresponding Author Dr. Malte Behrens [email protected] Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorProf. Dr. Robert Schlögl, Corresponding Author Prof. Dr. Robert Schlögl [email protected] Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this author Timur Kandemir, Timur Kandemir Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorDr. Manfred E. Schuster, Dr. Manfred E. Schuster Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorDr. Anatoliy Senyshyn, Dr. Anatoliy Senyshyn Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München, Lichtenbergstrasse 1, 85747 Garching (Germany)Search for more papers by this authorDr. Malte Behrens, Corresponding Author Dr. Malte Behrens [email protected] Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this authorProf. Dr. Robert Schlögl, Corresponding Author Prof. Dr. Robert Schlögl [email protected] Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany)Search for more papers by this author First published: 09 October 2013 https://doi.org/10.1002/anie.201305812Citations: 430 † We thank F. Girgsdies for help with the phase analysis, M. Hölzl and S. Pfanzelt for support at the beamline, Friedrich K. Seitz and Frank Rosowski (BASF SE) for providing the catalyst and for fruitful discussions, and FRM II (Garching) for the allocation of beam time. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Graphical Abstract In situ neutron diffraction was used to study the structural properties of an industrial ammonia synthesis catalyst under working conditions similar to those of the Haber–Bosch process. Despite favorable thermodynamics, no indications of reversible bulk nitridation of the iron catalyst was observed in a self-generated ammonia concentration of 12 vol % at 425 °C and 75 bar after 88 h on stream. Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Filename Description anie_201305812_sm_miscellaneous_information.pdf217.8 KB miscellaneous_information Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. References 1F. Haber, R. Le Rossignol, Z. Elektrochem. Angew. Phys. 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