TY - JOUR
T1 - Hydrogen storage by earth-abundant metals, synthesis and characterization of Al3FeH3.9
AU - Saitoh, Hiroyuki
AU - Sato, Toyoto
AU - Tanikami, Mai
AU - Ikeda, Kazutaka
AU - Machida, Akihiko
AU - Watanuki, Tetsu
AU - Taguchi, Tomitsugu
AU - Yamamoto, Shunya
AU - Yamaki, Tetsuya
AU - Takagi, Shigeyuki
AU - Otomo, Toshiya
AU - Orimo, Shin ichi
N1 - Funding Information:
We are grateful to Ren Hasegawa for providing technical support. This work was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas “Hydrogenomics” (Nos. JP18H05513 and JP18H05518 ) as well as grants from the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University (Proposal Nos. 18K0032 , 19K0049 , and 20K0022 ). The neutron scattering experiments were approved by the Neutron Scattering Program Advisory Committee of the Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK) (Proposal No. 2014S06). The synchrotron radiation experiments were performed using a QST experimental station at the QST beamline BL14B1, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2016A3652, 2018A3651, 2018B3651, 2019A3651, 2019B3651, and 2020A3651). In situ SR-XRPD profiles were analyzed using the program PDIndexer, developed by Dr. Y. Seto.
Funding Information:
We are grateful to Ren Hasegawa for providing technical support. This work was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas “Hydrogenomics” (Nos. JP18H05513 and JP18H05518) as well as grants from the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University (Proposal Nos. 18K0032, 19K0049, and 20K0022). The neutron scattering experiments were approved by the Neutron Scattering Program Advisory Committee of the Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK) (Proposal No. 2014S06). The synchrotron radiation experiments were performed using a QST experimental station at the QST beamline BL14B1, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2016A3652, 2018A3651, 2018B3651, 2019A3651, 2019B3651, and 2020A3651). In situ SR-XRPD profiles were analyzed using the program PDIndexer, developed by Dr. Y. Seto.
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/10
Y1 - 2021/10
N2 - Among the various functionalities of hydrides, their use in hydrogen storage has been the most intensively studied because hydrides can store hydrogen compactly and safely. Thus, hydrides are key materials for the hydrogen economy. Here, the hydrogen storage material Al3FeH3.9 has been synthesized from cost-effective earth-abundant metals, Fe and Al. Hydrides consisting of Al and transition metals with low hydrogen affinities are rare because such alloys are unstable. However, it is expected that appropriate mixing of the chemical states of hydrogen atoms would allow synthesis of Al-Fe hydrides. The experimentally determined crystal structure of Al3FeD3.9 suggests realization of the mixing of the chemical state of hydrogen. Al3FeH3.9 is more thermodynamically stable than AlH3, and it is likely that the mixing of the chemical state of hydrogen atoms is the source of increased stability. The results of this study confirm that by controlling the chemical states of hydrogen, it is possible to tune the thermodynamic stability of hydrides and thus realize novel functional hydrides.
AB - Among the various functionalities of hydrides, their use in hydrogen storage has been the most intensively studied because hydrides can store hydrogen compactly and safely. Thus, hydrides are key materials for the hydrogen economy. Here, the hydrogen storage material Al3FeH3.9 has been synthesized from cost-effective earth-abundant metals, Fe and Al. Hydrides consisting of Al and transition metals with low hydrogen affinities are rare because such alloys are unstable. However, it is expected that appropriate mixing of the chemical states of hydrogen atoms would allow synthesis of Al-Fe hydrides. The experimentally determined crystal structure of Al3FeD3.9 suggests realization of the mixing of the chemical state of hydrogen. Al3FeH3.9 is more thermodynamically stable than AlH3, and it is likely that the mixing of the chemical state of hydrogen atoms is the source of increased stability. The results of this study confirm that by controlling the chemical states of hydrogen, it is possible to tune the thermodynamic stability of hydrides and thus realize novel functional hydrides.
KW - Al-Fe hydrides
KW - High pressure and high temperature
KW - In situ synchrotron radiation X-ray powder diffraction measurement
KW - Neutron diffraction
KW - Rietveld refinement
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U2 - 10.1016/j.matdes.2021.109953
DO - 10.1016/j.matdes.2021.109953
M3 - Article
AN - SCOPUS:85112346215
SN - 0264-1275
VL - 208
JO - Materials and Design
JF - Materials and Design
M1 - 109953
ER -