Jung, Lee Yun Fadonougbo, Julien O. Suh, Jin-Yoo Lee, Young-Su Huh, Joo-Youl Cho, Young Whan 2024-01-19T22:02:33Z 2024-01-19T22:02:33Z 2021-09-03 2018-08-23 0360-3199 https://pubs.kist.re.kr/handle/201004/121024 Herein, we describe the synthesis of Mg2FeH6 by hydrogenation of a 2.1 Mg:Fe (mol/mol) powder mixture prepared by cold roll milling (CRM) in air. The thickness of Fe layers and the amount and distribution of oxygen with number of CRM passes were systematically analyzed. CRM-induced microstructural changes were shown to play an important role in Mg2FeH6 formation. Although repeated CRM effectively decreased the Fe layer thickness to values sufficient for the fast formation of Mg2FeH6, too much CRM passes decreased the total degree of hydrogenation due to inevitable oxidation of Mg in air. Both microstructure refinement and minimal oxidation are the prerequisites for efficient Mg2FeH6 synthesis, with the former condition being achievable by optimizing the number of milling passes, and the latter one requiring CRM under an inert atmosphere. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD HIGH-PRESSURE SYNTHESIS MG-FE-H SORPTION PROPERTIES STORAGE PROPERTIES HOT-EXTRUSION DECOMPOSITION HYDRIDES MECHANISMS ATMOSPHERE MG2COH5 Synthesis of Mg2FeH6 by hydrogenation of Mg/Fe powder mixture prepared by cold roll milling in air: Effects of microstructure and oxygen distribution Article 10.1016/j.ijhydene.2018.03.129 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.43, no.34, pp.16758 - 16765 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 43 34 16758 16765 scie scopus 000443665500029 2-s2.0-85045099335 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article; Proceedings Paper HIGH-PRESSURE SYNTHESIS MG-FE-H SORPTION PROPERTIES STORAGE PROPERTIES HOT-EXTRUSION DECOMPOSITION HYDRIDES MECHANISMS ATMOSPHERE MG2COH5 Cold roll milling Metal hydride Mg2FeH6 Oxygen analysis Transmission electron microscopy Solid hydrogen storage