1
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Liu Q, Xu W, Huang H, Shou H, Low J, Dai Y, Gong W, Li Y, Duan D, Zhang W, Jiang Y, Zhang G, Cao D, Wei K, Long R, Chen S, Song L, Xiong Y. Spectroscopic visualization of reversible hydrogen spillover between palladium and metal-organic frameworks toward catalytic semihydrogenation. Nat Commun 2024; 15:2562. [PMID: 38519485 PMCID: PMC10959988 DOI: 10.1038/s41467-024-46923-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 03/12/2024] [Indexed: 03/25/2024] Open
Abstract
Hydrogen spillover widely occurs in a variety of hydrogen-involved chemical and physical processes. Recently, metal-organic frameworks have been extensively explored for their integration with noble metals toward various hydrogen-related applications, however, the hydrogen spillover in metal/MOF composite structures remains largely elusive given the challenges of collecting direct evidence due to system complexity. Here we show an elaborate strategy of modular signal amplification to decouple the behavior of hydrogen spillover in each functional regime, enabling spectroscopic visualization for interfacial dynamic processes. Remarkably, we successfully depict a full picture for dynamic replenishment of surface hydrogen atoms under interfacial hydrogen spillover by quick-scanning extended X-ray absorption fine structure, in situ surface-enhanced Raman spectroscopy and ab initio molecular dynamics calculation. With interfacial hydrogen spillover, Pd/ZIF-8 catalyst shows unique alkyne semihydrogenation activity and selectivity for alkynes molecules. The methodology demonstrated in this study also provides a basis for further exploration of interfacial species migration.
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Affiliation(s)
- Qiaoxi Liu
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu, 215123, China
| | - Wenjie Xu
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hao Huang
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hongwei Shou
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Jingxiang Low
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yitao Dai
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wanbing Gong
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Youyou Li
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Delong Duan
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wenqing Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yawen Jiang
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Guikai Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Dengfeng Cao
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Kecheng Wei
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ran Long
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| | - Shuangming Chen
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Li Song
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yujie Xiong
- Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China.
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu, 215123, China.
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000, China.
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2
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Wang Y, Chen S, Guo J, Huang X, Cui T. Absence of superconductivity in I4/ mmm-FeH 5: experimental evidence. Phys Chem Chem Phys 2024; 26:7371-7376. [PMID: 38376428 DOI: 10.1039/d3cp05996k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
The experimentally discovered FeH5 exhibits a structure built of atomic hydrogen that only has bonding between hydrogen and iron atoms [C. M. Pepin, G. Geneste, A. Dewaele, M. Mezouar and P. Loubeyre, Science, 2017, 357, 382]. However, its superconductivity has remained unsolved since its discovery. In this work, we have synthesized I4/mmm-FeH5 at 139 GPa combined with laser-heating conditions. The electrical resistance measurements at ultrahigh pressures indicate that no evidence of superconducting transition of FeH5 is observed in the temperature range of 1.5 K to 270 K. These results indicate that I4/mmm-FeH5 does not exhibit superconductivity within the experimental temperature range, and the introduction of iron atoms is not beneficial to the formation of the superconducting phase.
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Affiliation(s)
- Yulong Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Su Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Jianning Guo
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- School of Physical Science and Technology, Ningbo University, Ningbo, 315211, China.
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3
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High-pressure synthesis of seven lanthanum hydrides with a significant variability of hydrogen content. Nat Commun 2022; 13:6987. [DOI: 10.1038/s41467-022-34755-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/04/2022] [Indexed: 11/18/2022] Open
Abstract
AbstractThe lanthanum-hydrogen system has attracted significant attention following the report of superconductivity in LaH10 at near-ambient temperatures and high pressures. Phases other than LaH10 are suspected to be synthesized based on both powder X-ray diffraction and resistivity data, although they have not yet been identified. Here, we present the results of our single-crystal X-ray diffraction studies on this system, supported by density functional theory calculations, which reveal an unexpected chemical and structural diversity of lanthanum hydrides synthesized in the range of 50 to 180 GPa. Seven lanthanum hydrides were produced, LaH3, LaH~4, LaH4+δ, La4H23, LaH6+δ, LaH9+δ, and LaH10+δ, and the atomic coordinates of lanthanum in their structures determined. The regularities in rare-earth element hydrides unveiled here provide clues to guide the search for other synthesizable hydrides and candidate high-temperature superconductors. The hydrogen content variability in lanthanum hydrides and the samples’ phase heterogeneity underline the challenges related to assessing potentially superconducting phases and the nature of electronic transitions in high-pressure hydrides.
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4
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Tsuppayakorn-aek P, Ahuja R, Bovornratanaraks T, Luo W. Superconducting Gap of Pressure Stabilized (Al 0.5Zr 0.5)H 3 from Ab Initio Anisotropic Migdal-Eliashberg Theory. ACS OMEGA 2022; 7:28190-28197. [PMID: 35990471 PMCID: PMC9386819 DOI: 10.1021/acsomega.2c02447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Motivated by Matthias' sixth rule for finding new superconducting materials in a cubic symmetry, we report the cluster expansion calculations, based on the density functional theory, of the superconducting properties of Al0.5Zr0.5H3. The Al0.5Zr0.5H3 structure is thermodynamically and dynamically stable up to at least 200 GPa. The structural properties suggest that the Al0.5Zr0.5H3 structure is a metallic. We calculate a superconducting transition temperature using the Allen-Dynes modified McMillan equation and anisotropic Migdal-Eliashberg equation. As result of this, the anisotropic Migdal-Eliashberg equation demonstrated that it exhibits superconductivity under high pressure with relatively high-T c of 55.3 K at a pressure of 100 GPa among a family of simple cubic structures. Therefore, these findings suggest that superconductivity could be observed experimentally in Al0.5Zr0.5H3.
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Affiliation(s)
- Prutthipong Tsuppayakorn-aek
- Extreme
Condition Physics Research Laboratory and Center of Excellence in
Physics of Energy Materials (CE:PEM), Department of Physics, Faculty
of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Thailand
Center of Excellence in Physics, Ministry of Higher Education, Science,
Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Rajeev Ahuja
- Materials
Theory, Department of Physics and Astronomy, Uppsala University, Box 530, SE-751 21 Uppsala, Sweden
- Department
of Physics, Indian Institute of Technology
(IIT) Ropar, Rupnagar 140001, Punjab, India
| | - Thiti Bovornratanaraks
- Extreme
Condition Physics Research Laboratory and Center of Excellence in
Physics of Energy Materials (CE:PEM), Department of Physics, Faculty
of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Thailand
Center of Excellence in Physics, Ministry of Higher Education, Science,
Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Wei Luo
- Materials
Theory, Department of Physics and Astronomy, Uppsala University, Box 530, SE-751 21 Uppsala, Sweden
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5
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Charraud JB, Geneste G, Torrent M, Maillet JB. Machine learning accelerated random structure searching: Application to yttrium superhydrides. J Chem Phys 2022; 156:204102. [DOI: 10.1063/5.0085173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The search for new superhydrides, promising materials for both hydrogen storage and high temperature superconductivity, made great progress, thanks to atomistic simulations and Crystal Structure Prediction (CSP) algorithms. When they are combined with Density Functional Theory (DFT), these methods are highly reliable and often match a great part of the experimental results. However, systems of increasing complexity (number of atoms and chemical species) become rapidly challenging as the number of minima to explore grows exponentially with the number of degrees of freedom in the simulation cell. An efficient sampling strategy preserving a sustainable computational cost then remains to be found. We propose such a strategy based on an active-learning process where machine learning potentials and DFT simulations are jointly used, opening the way to the discovery of complex structures. As a proof of concept, this method is applied to the exploration of tin crystal structures under various pressures. We showed that the α phase, not included in the learning process, is correctly retrieved, despite its singular nature of bonding. Moreover, all the expected phases are correctly predicted under pressure (20 and 100 GPa), suggesting the high transferability of our approach. The method has then been applied to the search of yttrium superhydrides (YH x) crystal structures under pressure. The YH6 structure of space group Im-3m is successfully retrieved. However, the exploration of more complex systems leads to the appearance of a large number of structures. The selection of the relevant ones to be included in the active learning process is performed through the analysis of atomic environments and the clustering algorithm. Finally, a metric involving a distance based on x-ray spectra is introduced, which guides the structural search toward experimentally relevant structures. The global process (active-learning and new selection methods) is finally considered to explore more complex and unknown YH x phases, unreachable by former CSP algorithms. New complex phases are found, demonstrating the ability of our approach to push back the exponential wall of complexity related to CSP.
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Affiliation(s)
| | - G. Geneste
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - M. Torrent
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
| | - J.-B. Maillet
- CEA-DAM, DIF, F-91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, LMCE, 91680, Bruyères-le-Châtel, France
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6
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Du M, Zhao W, Cui T, Duan D. Compressed superhydrides: the road to room temperature superconductivity. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:173001. [PMID: 35078164 DOI: 10.1088/1361-648x/ac4eaf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Room-temperature superconductivity has been a long-held dream and an area of intensive research. The discovery of H3S and LaH10under high pressure, with superconducting critical temperatures (Tc) above 200 K, sparked a race to find room temperature superconductors in compressed superhydrides. In recent groundbreaking work, room-temperature superconductivity of 288 K was achieved in carbonaceous sulfur hydride at 267 GPa. Here, we describe the important attempts of hydrides in the process of achieving room temperature superconductivity in decades, summarize the main characteristics of high-temperature hydrogen-based superconductors, such as hydrogen structural motifs, bonding features, electronic structure as well as electron-phonon coupling etc. This work aims to provide an up-to-date summary of several type hydrogen-based superconductors based on the hydrogen structural motifs, including covalent superhydrides, clathrate superhydrides, layered superhydrides, and hydrides containing isolated H atom, H2and H3molecular units.
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Affiliation(s)
- Mingyang Du
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Wendi Zhao
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Tian Cui
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, People's Republic of China
| | - Defang Duan
- College of Physics, Jilin University, Changchun 130012, People's Republic of China
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7
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Yang L, Zhang Y, Chen Y, Zhong X, Wang D, Lang J, Qu X, Yang J. Unconventional Stoichiometries of Na-O Compounds at High Pressures. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7650. [PMID: 34947246 PMCID: PMC8707189 DOI: 10.3390/ma14247650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/04/2021] [Accepted: 12/10/2021] [Indexed: 11/16/2022]
Abstract
It has been realized that the stoichiometries of compounds may change under high pressure, which is crucial in the discovery of novel materials. This work uses systematic structure exploration and first-principles calculations to consider the stability of different stoichiometries of Na-O compounds with respect to pressure and, thus, construct a high-pressure stability field and convex hull diagram. Four previously unknown stoichiometries (NaO5, NaO4, Na4O, and Na3O) are predicted to be thermodynamically stable. Four new phases (P2/m and Cmc21 NaO2 and Immm and C2/m NaO3) of known stoichiometries are also found. The O-rich stoichiometries show the remarkable features of all the O atoms existing as quasimolecular O2 units and being metallic. Calculations of the O-O bond lengths and Bader charges are used to explore the electronic properties and chemical bonding of the O-rich compounds. The Na-rich compounds stabilized at extreme pressures (P > 200 GPa) are electrides with strong interstitial electron localization. The C2/c phase of Na3O is found to be a zero-dimensional electride with an insulating character. The Cmca phase of Na4O is a one-dimensional metallic electride. These findings of new compounds with unusual chemistry might stimulate future experimental and theoretical investigations.
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Affiliation(s)
- Lihua Yang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
- State Key Laboratory of Integrated Optoelectronics, College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Yukai Zhang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Yanli Chen
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Xin Zhong
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Dandan Wang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Jihui Lang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Xin Qu
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
| | - Jinghai Yang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, College of Physics, Jilin Normal University, Siping 136000, China; (L.Y.); (Y.Z.); (X.Z.); (D.W.); (J.L.)
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8
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Kong P, Minkov VS, Kuzovnikov MA, Drozdov AP, Besedin SP, Mozaffari S, Balicas L, Balakirev FF, Prakapenka VB, Chariton S, Knyazev DA, Greenberg E, Eremets MI. Superconductivity up to 243 K in the yttrium-hydrogen system under high pressure. Nat Commun 2021; 12:5075. [PMID: 34417471 PMCID: PMC8379216 DOI: 10.1038/s41467-021-25372-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023] Open
Abstract
The discovery of superconducting H3S with a critical temperature Tc∼200 K opened a door to room temperature superconductivity and stimulated further extensive studies of hydrogen-rich compounds stabilized by high pressure. Here, we report a comprehensive study of the yttrium-hydrogen system with the highest predicted Tcs among binary compounds and discuss the contradictions between different theoretical calculations and experimental data. We synthesized yttrium hydrides with the compositions of YH3, YH4, YH6 and YH9 in a diamond anvil cell and studied their crystal structures, electrical and magnetic transport properties, and isotopic effects. We found superconductivity in the Im-3m YH6 and P63/mmc YH9 phases with maximal Tcs of ∼220 K at 183 GPa and ∼243 K at 201 GPa, respectively. Fm-3m YH10 with the highest predicted Tc > 300 K was not observed in our experiments, and instead, YH9 was found to be the hydrogen-richest yttrium hydride in the studied pressure and temperature range up to record 410 GPa and 2250 K.
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Affiliation(s)
- Panpan Kong
- Max-Planck-Institut für Chemie, Mainz, Germany
| | | | - Mikhail A Kuzovnikov
- Institute of Solid State Physics Russian Academy of Sciences, Chernogolovka, Moscow District, Russia
| | | | | | - Shirin Mozaffari
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA
| | - Luis Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA
| | | | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL, USA
| | - Stella Chariton
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL, USA
| | - Dmitry A Knyazev
- Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany
| | - Eran Greenberg
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL, USA
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9
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Tsuppayakorn-Aek P, Phaisangittisakul N, Ahuja R, Bovornratanaraks T. High-temperature superconductor of sodalite-like clathrate hafnium hexahydride. Sci Rep 2021; 11:16403. [PMID: 34385486 PMCID: PMC8361170 DOI: 10.1038/s41598-021-95112-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 07/21/2021] [Indexed: 12/02/2022] Open
Abstract
Hafnium hydrogen compounds have recently become the vibrant materials for structural prediction at high pressure, from their high potential candidate for high-temperature superconductors. In this work, we predict \documentclass[12pt]{minimal}
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\begin{document}$$\hbox {HfH}_{6}$$\end{document}HfH6 by exploiting the evolutionary searching. A high-pressure phase adopts a sodalite-like clathrate structure, showing the body-centered cubic structure with a space group of \documentclass[12pt]{minimal}
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\begin{document}$$Im\bar{3}m$$\end{document}Im3¯m. The first-principles calculations have been used, including the zero-point energy, to investigate the probable structures up to 600 GPa, and find that the \documentclass[12pt]{minimal}
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\begin{document}$$Im\bar{3}m$$\end{document}Im3¯m structure is thermodynamically and dynamically stable. This remarkable result of the \documentclass[12pt]{minimal}
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\begin{document}$$Im\bar{3}m$$\end{document}Im3¯m structure shows the van Hove singularity at the Fermi level by determining the density of states. We calculate a superconducting transition temperature (\documentclass[12pt]{minimal}
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\begin{document}$$T_{c}$$\end{document}Tc) using Allen-Dynes equation and demonstrated that it exhibits superconductivity under high pressure with relatively high-\documentclass[12pt]{minimal}
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\begin{document}$$T_{c}$$\end{document}Tc of 132 K.
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Affiliation(s)
- Prutthipong Tsuppayakorn-Aek
- Extreme Conditions Physics Research Laboratory (ECPRL) and Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.,Thailand Centre of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand
| | - Nakorn Phaisangittisakul
- Extreme Conditions Physics Research Laboratory (ECPRL) and Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.,Thailand Centre of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand
| | - Rajeev Ahuja
- Condensed Matter Theory Group, Department of Physics and Materials Science, Uppsala University, Box 530, Uppsala, SE, 751 21, Sweden.,Department of Physics, Indian Institute of Technology (IIT) Ropar, Rupnagar, Punjab, 140001, India
| | - Thiti Bovornratanaraks
- Extreme Conditions Physics Research Laboratory (ECPRL) and Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand. .,Thailand Centre of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand.
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10
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Yao S, Wang C, Liu S, Jeon H, Cho JH. Formation Mechanism of Chemically Precompressed Hydrogen Clathrates in Metal Superhydrides. Inorg Chem 2021; 60:12934-12940. [PMID: 34369748 DOI: 10.1021/acs.inorgchem.1c01340] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recently, the experimental discovery of high-Tc superconductivity in compressed hydrides H3S and LaH10 at megabar pressures has triggered searches for various superconducting superhydrides. It was experimentally observed that thorium superhydrides, ThH10 and ThH9, are stabilized at much lower pressures than LaH10. Based on first-principles density functional theory calculations, we reveal that the isolated Th frameworks of ThH10 and ThH9 have relatively more excess electrons in interstitial regions than the La framework of LaH10. Such interstitial excess electrons easily participate in the formation of the anionic H cage surrounding the metal atom. The resulting Coulomb attraction between cationic Th atoms and anionic H cages is estimated to be stronger than the corresponding one of LaH10, thereby giving rise to larger chemical precompressions in ThH10 and ThH9. Such a formation mechanism of H clathrates can also be applied to other superhydrides such as CeH9, PrH9, and NdH9. Our findings demonstrate that interstitial excess electrons in the isolated metal frameworks of high-pressure superhydrides play an important role in generating the chemical precompression of H clathrates.
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Affiliation(s)
- Shichang Yao
- Department of Physics, Research Institute for Natural Science, and Institute for High Pressure at Hanyang University, Hanyang University, 222 Wangsimni-ro, Seongdong-Ku, Seoul 04763, Republic of Korea
| | - Chongze Wang
- Department of Physics, Research Institute for Natural Science, and Institute for High Pressure at Hanyang University, Hanyang University, 222 Wangsimni-ro, Seongdong-Ku, Seoul 04763, Republic of Korea
| | - Shuyuan Liu
- Department of Physics, Research Institute for Natural Science, and Institute for High Pressure at Hanyang University, Hanyang University, 222 Wangsimni-ro, Seongdong-Ku, Seoul 04763, Republic of Korea
| | - Hyunsoo Jeon
- Department of Physics, Research Institute for Natural Science, and Institute for High Pressure at Hanyang University, Hanyang University, 222 Wangsimni-ro, Seongdong-Ku, Seoul 04763, Republic of Korea
| | - Jun-Hyung Cho
- Department of Physics, Research Institute for Natural Science, and Institute for High Pressure at Hanyang University, Hanyang University, 222 Wangsimni-ro, Seongdong-Ku, Seoul 04763, Republic of Korea
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11
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Marizy A, Geneste G, Garbarino G, Loubeyre P. High pressure polymorphism of LiBH 4 and of NaBH 4. RSC Adv 2021; 11:25274-25283. [PMID: 35478871 PMCID: PMC9036969 DOI: 10.1039/d1ra00816a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 07/08/2021] [Indexed: 01/15/2023] Open
Abstract
The pressure-induced structural changes in LiBH4 and in NaBH4 have been investigated experimentally up to 290 GPa by coupling Raman spectroscopy, infrared absorption spectroscopy and synchrotron X-ray diffraction. This data set is also analysed in the light of Density Functional Theory calculations performed up to 600 GPa. The [BH4]− unit appears to be remarkably resistant under pressure. NaBH4 remains stable in the known Pnma γ-phase up to 200 GPa and calculations predict a transition to a metallic polymeric C2/c phase at about 480 GPa. LiBH4 is confirmed to exhibit a richer polymorphism. A new Pnma orthorhombic phase VI is found to be stable above 60 GPa and there are hints of a possible phase VII above 160 GPa. DFT calculations predict that two other high pressure LiBH4 phases should appear at about 290 and 428 GPa. A very slight solubility of H2 inside phases II, III and V of LiBH4 is observed. A NaBH4(H2)0.5 complex is predicted to be stable above 150 GPa. Diamond anvil cell experiments are used along with density functional theory calculations to extend the phase diagram of LiBH4 & NaBH4 and explore new NaBH4(H2)x compounds at Mbar pressures.![]()
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Affiliation(s)
| | | | - Gaston Garbarino
- ESRF, The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
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12
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A Review of the Melting Curves of Transition Metals at High Pressures Using Static Compression Techniques. CRYSTALS 2021. [DOI: 10.3390/cryst11040416] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The accurate determination of melting curves for transition metals is an intense topic within high pressure research, both because of the technical challenges included as well as the controversial data obtained from various experiments. This review presents the main static techniques that are used for melting studies, with a strong focus on the diamond anvil cell; it also explores the state of the art of melting detection methods and analyzes the major reasons for discrepancies in the determination of the melting curves of transition metals. The physics of the melting transition is also discussed.
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13
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Xie H, Yao Y, Feng X, Duan D, Song H, Zhang Z, Jiang S, Redfern SAT, Kresin VZ, Pickard CJ, Cui T. Hydrogen Pentagraphenelike Structure Stabilized by Hafnium: A High-Temperature Conventional Superconductor. PHYSICAL REVIEW LETTERS 2020; 125:217001. [PMID: 33275012 DOI: 10.1103/physrevlett.125.217001] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/07/2020] [Accepted: 09/21/2020] [Indexed: 05/25/2023]
Abstract
The recent discovery of H_{3}S and LaH_{10} superconductors with record high superconducting transition temperatures T_{c} at high pressure has fueled the search for room-temperature superconductivity in the compressed superhydrides. Here we introduce a new class of high T_{c} hydrides with a novel structure and unusual properties. We predict the existence of an unprecedented hexagonal HfH_{10}, with remarkably high value of T_{c} (around 213-234 K) at 250 GPa. As concerns the novel structure, the H ions in HfH_{10} are arranged in clusters to form a planar "pentagraphenelike" sublattice. The layered arrangement of these planar units is entirely different from the covalent sixfold cubic structure in H_{3}S and clathratelike structure in LaH_{10}. The Hf atom acts as a precompressor and electron donor to the hydrogen sublattice. This pentagraphenelike H_{10} structure is also found in ZrH_{10}, ScH_{10}, and LuH_{10} at high pressure, each material showing a high T_{c} ranging from 134 to 220 K. Our study of dense superhydrides with pentagraphenelike layered structures opens the door to the exploration of a new class of high T_{c} superconductors.
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Affiliation(s)
- Hui Xie
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yansun Yao
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Xiaolei Feng
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
- Department of Earth Science, University of Cambridge, Downing Site, Cambridge CB2 3EQ, United Kingdom
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Hao Song
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Zihan Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Shuqing Jiang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- Synergetic Extreme Condition User Facility, College of Physics, Jilin University, Changchun, Jilin 130012, China
| | - Simon A T Redfern
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
- Asian School of the Environment, Nanyang Technological University, Singapore 639798
| | - Vladimir Z Kresin
- Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, California 94720, USA
| | - Chris J Pickard
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
- Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
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14
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Spektor K, Crichton WA, Filippov S, Simak SI, Fischer A, Häussermann U. Na 3FeH 7 and Na 3CoH 6: Hydrogen-Rich First-Row Transition Metal Hydrides from High Pressure Synthesis. Inorg Chem 2020; 59:16467-16473. [PMID: 33141575 PMCID: PMC7672699 DOI: 10.1021/acs.inorgchem.0c02294] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
![]()
The
formation of ternary hydrogen-rich hydrides involving the first-row
transition metals TM = Fe and Co in high oxidation states is demonstrated
from in situ synchrotron diffraction studies of reaction mixtures
NaH–TM–H2 at p ≈ 10
GPa. Na3FeH7 and Na3CoH6 feature pentagonal bipyramidal FeH73– and octahedral CoH63– 18-electron complexes,
respectively. At high pressure, high temperature (300 < T ≤ 470 °C) conditions, metal atoms are arranged
as in the face-centered cubic Heusler structure, and ab initio molecular
dynamics simulations suggest that the complexes undergo reorientational
dynamics. Upon cooling, subtle changes in the diffraction patterns
evidence reversible and rapid phase transitions associated with ordering
of the complexes. During decompression, Na3FeH7 and Na3CoH6 transform to tetragonal and orthorhombic
low pressure forms, respectively, which can be retained at ambient
pressure. The discovery of Na3FeH7 and Na3CoH6 establishes a consecutive series of homoleptic
hydrogen-rich complexes for first-row transition metals from Cr to
Ni. In situ synchrotron diffraction studies
of reaction mixtures NaH−TM−H2 (TM = Fe,
Co) at p ≈ 10 GPa revealed the formation of
ternary hydrides Na3FeH7 and Na3CoH6 featuring pentagonal bipyramidal Fe(IV)H73− and octahedral Co(III)H63− complexes, respectively. The discovery of Na3FeH7 and Na3CoH6 establishes a consecutive
series of homoleptic hydrogen-rich complexes for first-row transition
metals from Cr to Ni.
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Affiliation(s)
- Kristina Spektor
- ESRF, The European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Wilson A Crichton
- ESRF, The European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Stanislav Filippov
- Theoretical Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden.,Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Sergei I Simak
- Theoretical Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Andreas Fischer
- Department of Physics, Augsburg University, D-86135 Augsburg, Germany
| | - Ulrich Häussermann
- Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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15
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Peña-Alvarez M, Li B, Kelsall LC, Binns J, Dalladay-Simpson P, Hermann A, Howie RT, Gregoryanz E. Synthesis of Superconducting Cobalt Trihydride. J Phys Chem Lett 2020; 11:6420-6425. [PMID: 32658481 DOI: 10.1021/acs.jpclett.0c01807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The Co-H system has been investigated through high-pressure, high-temperature X-ray diffraction experiments combined with first-principles calculations. On compression of elemental cobalt in a hydrogen medium, we observe face-centered cubic cobalt hydride (CoH) and cobalt dihydride (CoH2) above 33 GPa. Laser heating CoH2 in a hydrogen matrix at 75 GPa to temperatures in excess of ∼800 K produces cobalt trihydride (CoH3) which adopts a primitive structure. Density functional theory calculations support the stability of CoH3. This phase is predicted to be thermodynamically stable at pressures above 18 GPa and to be a superconductor below 23 K. Theory predicts that this phase remains dynamically stable upon decompression above 11 GPa where it has a maximum Tc of 30 K.
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Affiliation(s)
- Miriam Peña-Alvarez
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Bin Li
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
- New Energy Technology Engineering Laboratory of Jiangsu Province and School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Liam C Kelsall
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Jack Binns
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Philip Dalladay-Simpson
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Andreas Hermann
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
| | - Ross T Howie
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
| | - Eugene Gregoryanz
- Centre for Science at Extreme Conditions & The School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, U.K
- Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Road, Shanghai 201203, China
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16
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Crystal and Magnetic Structures of Double Hexagonal Close-Packed Iron Deuteride. Sci Rep 2020; 10:9934. [PMID: 32555226 PMCID: PMC7303155 DOI: 10.1038/s41598-020-66669-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/22/2020] [Indexed: 11/09/2022] Open
Abstract
Neutron powder diffraction profiles were collected for iron deuteride (FeDx) while the temperature decreased from 1023 to 300 K for a pressure range of 4-6 gigapascal (GPa). The ε' deuteride with a double hexagonal close-packed (dhcp) structure, which coexisted with other stable or metastable deutrides at each temperature and pressure condition, formed solid solutions with a composition of FeD0.68(1) at 673 K and 6.1 GPa and FeD0.74(1) at 603 K and 4.8 GPa. Upon stepwise cooling to 300 K, the D-content x increased to a stoichiometric value of 1.0 to form monodeuteride FeD1.0. In the dhcp FeD1.0 at 300 K and 4.2 GPa, dissolved D atoms fully occupied the octahedral interstitial sites, slightly displaced from the octahedral centers in the dhcp metal lattice, and the dhcp sequence of close-packed Fe planes contained hcp-stacking faults at 12%. Magnetic moments with 2.11 ± 0.06 μB/Fe-atom aligned ferromagnetically in parallel on the Fe planes.
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17
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A Practical Review of the Laser-Heated Diamond Anvil Cell for University Laboratories and Synchrotron Applications. CRYSTALS 2020. [DOI: 10.3390/cryst10060459] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the past couple of decades, the laser-heated diamond anvil cell (combined with in situ techniques) has become an extensively used tool for studying pressure-temperature-induced evolution of various physical (and chemical) properties of materials. In this review, the general challenges associated with the use of the laser-heated diamond anvil cells are discussed together with the recent progress in the use of this tool combined with synchrotron X-ray diffraction and absorption spectroscopy.
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18
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Binns J, He Y, Donnelly ME, Peña-Alvarez M, Wang M, Kim DY, Gregoryanz E, Dalladay-Simpson P, Howie RT. Complex Hydrogen Substructure in Semimetallic RuH 4. J Phys Chem Lett 2020; 11:3390-3395. [PMID: 32251597 DOI: 10.1021/acs.jpclett.0c00688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
When compressed in a matrix of solid hydrogen, many metals form compounds with increasingly high hydrogen contents. At high density, hydrogenic sublattices can emerge, which may act as low-dimensional analogues of atomic hydrogen. We show that at high pressures and temperatures, ruthenium forms polyhydride species that exhibit intriguing hydrogen substructures with counterintuitive electronic properties. Ru3H8 is synthesized from RuH in H2 at 50 GPa and at temperatures in excess of 1000 K, adopting a cubic structure with short H-H distances. When synthesis pressures are increased above 85 GPa, we observe RuH4 which crystallizes in a remarkable structure containing corner-sharing H6 octahedra. Calculations indicate this phase is semimetallic at 100 GPa.
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Affiliation(s)
- Jack Binns
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Yu He
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Key Laboratory of High-Temperature and High-Pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
| | - Mary-Ellen Donnelly
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Miriam Peña-Alvarez
- Centre for Science at Extreme Conditions and The School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Mengnan Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Duck Young Kim
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Eugene Gregoryanz
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
- Centre for Science at Extreme Conditions and The School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Philip Dalladay-Simpson
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
| | - Ross T Howie
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
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19
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Abstract
δ -AlOOH has been shown to be stable at the pressure–temperature conditions of the lower mantle. However, its stability remains uncertain at the conditions expected for the lowermost mantle where temperature is expected to rise quickly with increasing depth. Our laser-heated diamond-anvil cell experiments show that δ -AlOOH undergoes dehydration at ∼2000 K above 90 GPa. This dehydration temperature is lower than geotherm temperatures expected at the bottom ∼700 km of the mantle and suggests that δ -AlOOH in warm slabs would dehydrate in this region. Our experiments also show that the released H 2 O from dehydration of δ -AlOOH can react with metallic iron, forming iron oxide, iron hydroxide, and possibly iron hydride. Our observations suggest that H 2 O from the dehydration of subducting slabs, if it occurs, could alter the chemical composition of the surrounding mantle and core regions.
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20
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Spektor K, Crichton WA, Filippov S, Klarbring J, Simak SI, Fischer A, Häussermann U. Na-Ni-H Phase Formation at High Pressures and High Temperatures: Hydrido Complexes [NiH 5] 3- Versus the Perovskite NaNiH 3. ACS OMEGA 2020; 5:8730-8743. [PMID: 32337435 PMCID: PMC7178781 DOI: 10.1021/acsomega.0c00239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 03/19/2020] [Indexed: 05/28/2023]
Abstract
The Na-Ni-H system was investigated by in situ synchrotron diffraction studies of reaction mixtures NaH-Ni-H2 at around 5, 10, and 12 GPa. The existence of ternary hydrogen-rich hydrides with compositions Na3NiH5 and NaNiH3, where Ni attains the oxidation state II, is demonstrated. Upon heating at ∼5 GPa, face-centered cubic (fcc) Na3NiH5 forms above 430 °C. Upon cooling, it undergoes a rapid and reversible phase transition at 330 °C to an orthorhombic (Cmcm) form. Upon pressure release, Na3NiH5 further transforms into its recoverable Pnma form whose structure was elucidated from synchrotron powder diffraction data, aided by first-principles density functional theory (DFT) calculations. Na3NiH5 features previously unknown square pyramidal 18-electron complexes NiH5 3-. In the high temperature fcc form, metal atoms are arranged as in the Heusler structure, and ab initio molecular dynamics simulations suggest that the complexes are dynamically disordered. The Heusler-type metal partial structure is essentially maintained in the low temperature Cmcm form, in which NiH5 3- complexes are ordered. It is considerably rearranged in the low pressure Pnma form. Experiments at 10 GPa showed an initial formation of fcc Na3NiH5 followed by the addition of the perovskite hydride NaNiH3, in which Ni(II) attains an octahedral environment by H atoms. NaNiH3 is recoverable at ambient pressures and represents the sole product of 12 GPa experiments. DFT calculations show that the decomposition of Na3NiH5 = NaNiH3 + 2 NaH is enthalpically favored at all pressures, suggesting that Na3NiH5 is metastable and its formation is kinetically favored. Ni-H bonding in metallic NaNiH3 is considered covalent, as in electron precise Na3NiH5, but delocalized in the polyanion [NiH3]-.
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Affiliation(s)
- Kristina Spektor
- ESRF,
The European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Wilson A. Crichton
- ESRF,
The European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Stanislav Filippov
- Theoretical
Physics Division, Department of Physics, Chemistry and Biology (IFM) Linköping University, SE-581 83 Linköping, Sweden
- Department
of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Johan Klarbring
- Theoretical
Physics Division, Department of Physics, Chemistry and Biology (IFM) Linköping University, SE-581 83 Linköping, Sweden
| | - Sergei I. Simak
- Theoretical
Physics Division, Department of Physics, Chemistry and Biology (IFM) Linköping University, SE-581 83 Linköping, Sweden
| | - Andreas Fischer
- Department
of Physics, Augsburg University, D-86135 Augsburg, Germany
| | - Ulrich Häussermann
- Department
of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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21
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Inelastic neutron scattering evidence for anomalous H-H distances in metal hydrides. Proc Natl Acad Sci U S A 2020; 117:4021-4026. [PMID: 32029594 DOI: 10.1073/pnas.1912900117] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hydrogen-containing materials are of fundamental as well as technological interest. An outstanding question for both is the amount of hydrogen that can be incorporated in such materials, because that determines dramatically their physical properties such as electronic and crystalline structure. The number of hydrogen atoms in a metal is controlled by the interaction of hydrogens with the metal and by the hydrogen-hydrogen interactions. It is well established that the minimal possible hydrogen-hydrogen distances in conventional metal hydrides are around 2.1 Å under ambient conditions, although closer H-H distances are possible for materials under high pressure. We present inelastic neutron scattering measurements on hydrogen in [Formula: see text] showing nonexpected scattering at low-energy transfer. The analysis of the spectra reveals that these spectral features in part originate from hydrogen vibrations confined by neighboring hydrogen at distances as short as 1.6 Å. These distances are much smaller than those found in related hydrides, thereby violating the so-called Switendick criterion. The results have implications for the design and creation of hydrides with additional properties and applications.
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22
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Xie H, Zhang W, Duan D, Huang X, Huang Y, Song H, Feng X, Yao Y, Pickard CJ, Cui T. Superconducting Zirconium Polyhydrides at Moderate Pressures. J Phys Chem Lett 2020; 11:646-651. [PMID: 31903761 DOI: 10.1021/acs.jpclett.9b03632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Highly compressed hydrides have been at the forefront of the search for high-Tc superconductivity. The recent discovery of record-high Tc's in H3S and LaH10±x under high pressure fuels the enthusiasm for finding good superconductors in similar hydride groups. Guided by first-principles structure prediction, we successfully synthesized ZrH3 and Zr4H15 at modest pressures (30-50 GPa) in diamond anvil cells by two different reaction routes: ZrH2 + H2 at room temperature and Zr + H2 at ∼1500 K by laser heating. From the synchrotron X-ray diffraction patterns, ZrH3 is found to have a Pm3̅n structure corresponding to the familiar A15 structure, and Zr4H15 has an I4̅3d structure isostructural to Th4H15. Electrical resistance measurement and the dependence of Tc on the applied magnetic field of the sample showed the emergence of two superconducting transitions at 6.4 and 4.0 K at 40 GPa, which correspond to the two Tc's for ZrH3 and Zr4H15.
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Affiliation(s)
- Hui Xie
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Wenting Zhang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , United Kingdom
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Yanping Huang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Hao Song
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Xiaolei Feng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , 10 Xibeiwang East Road , Beijing , 100094 , China
- Department of Earth Science , University of Cambridge , Downing Street , Cambridge CB2 3EQ , United Kingdom
| | - Yansun Yao
- Department of Physics and Engineering Physics , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5E2 , Canada
| | - Chris J Pickard
- Department of Materials Science and Metallurgy , University of Cambridge , 27 Charles Babbage Road , Cambridge CB3 0FS , United Kingdom
- Advanced Institute for Materials Research , Tohoku University , 2-1-1 Katahira , Aoba, Sendai 980-8577 , Japan
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
- School of Physical Science and Technology , Ningbo University , No. 818 Fenghua Road , Jiangbei District, Ningbo , 315211 , China
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23
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Zhou D, Semenok DV, Duan D, Xie H, Chen W, Huang X, Li X, Liu B, Oganov AR, Cui T. Superconducting praseodymium superhydrides. SCIENCE ADVANCES 2020; 6:eaax6849. [PMID: 32158937 PMCID: PMC7048426 DOI: 10.1126/sciadv.aax6849] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 11/25/2019] [Indexed: 05/20/2023]
Abstract
Superhydrides have complex hydrogenic sublattices and are important prototypes for studying metallic hydrogen and high-temperature superconductors. Previous results for LaH10 suggest that the Pr-H system may be especially worth studying because of the magnetism and valence-band f-electrons in the element Pr. Here, we successfully synthesized praseodymium superhydrides (PrH9) in laser-heated diamond anvil cells. Synchrotron x-ray diffraction analysis demonstrated the presence of previously predicted F4 ¯ 3m-PrH9 and unexpected P63/mmc-PrH9 phases. Experimental studies of electrical resistance in the PrH9 sample showed the emergence of a possible superconducting transition (T c) below 9 K and T c dependent on the applied magnetic field. Theoretical calculations indicate that magnetic order and likely superconductivity coexist in a narrow range of pressures in the PrH9 sample, which may contribute to its low superconducting temperature. Our results highlight the intimate connections between hydrogenic sublattices, density of states, magnetism, and superconductivity in Pr-based superhydrides.
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Affiliation(s)
- Di Zhou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Dmitrii V. Semenok
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center 143026, 3 Nobel Street, Moscow, Russia
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Hui Xie
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Wuhao Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Xin Li
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Bingbing Liu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Artem R. Oganov
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center 143026, 3 Nobel Street, Moscow, Russia
- International Center for Materials Discovery, Northwestern Polytechnical University, Xi’an 710072, China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
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24
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Jin Q, Shen Y, Cai Y, Chu L, Zeng Y. Resource utilization of waste V 2O 5-based deNO x catalysts for hydrogen production from formaldehyde and water via steam reforming. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120934. [PMID: 31374373 DOI: 10.1016/j.jhazmat.2019.120934] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/21/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
The harmless disposal of abandoned and toxic V2O5(WO3)/TiO2 (VWT) deNOx catalysts has become a worldwide great demand, a new resource path for hydrogen production from steam reforming of formaldehyde and water using the waste VWT deNOx catalysts as catalyst carriers was proposed. The waste V2O5-based catalysts supported NiO (N/VWT) catalysts prepared by impregnation method were comparatively studied for hydrogen production. The H2 and CO selectivity of the optimum N/VWT separately reached 100% and 72.5%, and the formaldehyde conversion of the N/VWT reached 86.3% at 400 ℃ and higher than 93.0% at 450-600 ℃. Analysis showed that the hydroxyl species played the most important role, and its richness determined the catalytic performance directly. The high acid sites and excellent redox properties were beneficial to enhance the catalytic performance. The in situ DRIFT study verified that the hydrogen bonds between formate species and hydroxyl groups reduced reaction steps, which accelerated the progress of the reaction. The adsorbed formaldehyde transformed to formate species firstly, and then produced H2 and CO2 (or CO) by dehydrogenation. Ultimately, the resource utilization path not only completely solved the harmless problems of the waste V2O5-based deNOx catalysts and formaldehyde, but also contributed to the hydrogen production.
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Affiliation(s)
- Qijie Jin
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, China; Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, China
| | - Yuesong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, China; Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, China.
| | - Yi Cai
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, China
| | - Lin Chu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Yanwei Zeng
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
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25
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Wang X, Liu X. High pressure: a feasible tool for the synthesis of unprecedented inorganic compounds. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00477d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
After a simple classification of inorganic materials synthesized at high-temperature and high-pressure, this tutorial reviews the important research results in the field of high-temperature and high-pressure inorganic synthesis in the past 5 years.
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Affiliation(s)
- Xuerong Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Xiaoyang Liu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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26
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Lesik M, Plisson T, Toraille L, Renaud J, Occelli F, Schmidt M, Salord O, Delobbe A, Debuisschert T, Rondin L, Loubeyre P, Roch JF. Magnetic measurements on micrometer-sized samples under high pressure using designed NV centers. Science 2019; 366:1359-1362. [DOI: 10.1126/science.aaw4329] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 11/06/2019] [Indexed: 01/24/2023]
Abstract
Pressure can be used to tune the interplay among structural, electronic, and magnetic interactions in materials. High pressures are usually applied in the diamond anvil cell, making it difficult to study the magnetic properties of a micrometer-sized sample. We report a method for spatially resolved optical magnetometry based on imaging a layer of nitrogen-vacancy (NV) centers created at the surface of a diamond anvil. We illustrate the method using two sets of measurements realized at room temperature and low temperature, respectively: the pressure evolution of the magnetization of an iron bead up to 30 gigapascals showing the iron ferromagnetic collapse and the detection of the superconducting transition of magnesium dibromide at 7 gigapascals.
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Affiliation(s)
- Margarita Lesik
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France
| | | | - Loïc Toraille
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France
| | | | | | - Martin Schmidt
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France
| | | | | | | | - Loïc Rondin
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France
| | | | - Jean-François Roch
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France
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27
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Salke NP, Davari Esfahani MM, Zhang Y, Kruglov IA, Zhou J, Wang Y, Greenberg E, Prakapenka VB, Liu J, Oganov AR, Lin JF. Synthesis of clathrate cerium superhydride CeH 9 at 80-100 GPa with atomic hydrogen sublattice. Nat Commun 2019; 10:4453. [PMID: 31575861 PMCID: PMC6773858 DOI: 10.1038/s41467-019-12326-y] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/28/2019] [Indexed: 11/10/2022] Open
Abstract
Hydrogen-rich superhydrides are believed to be very promising high-Tc superconductors. Recent experiments discovered superhydrides at very high pressures, e.g. FeH5 at 130 GPa and LaH10 at 170 GPa. With the motivation of discovering new hydrogen-rich high-Tc superconductors at lowest possible pressure, here we report the prediction and experimental synthesis of cerium superhydride CeH9 at 80–100 GPa in the laser-heated diamond anvil cell coupled with synchrotron X-ray diffraction. Ab initio calculations were carried out to evaluate the detailed chemistry of the Ce-H system and to understand the structure, stability and superconductivity of CeH9. CeH9 crystallizes in a P63/mmc clathrate structure with a very dense 3-dimensional atomic hydrogen sublattice at 100 GPa. These findings shed a significant light on the search for superhydrides in close similarity with atomic hydrogen within a feasible pressure range. Discovery of superhydride CeH9 provides a practical platform to further investigate and understand conventional superconductivity in hydrogen rich superhydrides. Hydrogen-rich superhydrides are promising high-temperature superconductors which have been observed only at pressures above 170 GPa. Here the authors show that CeH9 can be synthesized at 80-100 GPa with laser heating, and is characterized by a clathrate structure with a dense 3-dimensional atomic hydrogen sublattice.
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Affiliation(s)
- Nilesh P Salke
- Center for High Pressure Science & Technology Advanced Research (HPSTAR), 100094, Beijing, China
| | - M Mahdi Davari Esfahani
- Department of Geosciences, Center for Materials by Design, and Institute for Advanced Computational Science, State University of New York, Stony Brook, New York, NY, 11794-2100, USA
| | - Youjun Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, 610065, Chengdu, China
| | - Ivan A Kruglov
- Department of Problems of Physics and Energetics, Moscow Institute of Physics and Technology, 9 Institutskiy Lane, Dolgoprudny City, Moscow Region, 141700, Russia.,Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia
| | - Jianshi Zhou
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Yaguo Wang
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Eran Greenberg
- Center for Advanced Radiation Sources, University of Chicago, Chicago, 60637, IL, USA
| | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, 60637, IL, USA
| | - Jin Liu
- Center for High Pressure Science & Technology Advanced Research (HPSTAR), 100094, Beijing, China
| | - Artem R Oganov
- Department of Problems of Physics and Energetics, Moscow Institute of Physics and Technology, 9 Institutskiy Lane, Dolgoprudny City, Moscow Region, 141700, Russia. .,Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, 3 Nobel Street, Moscow, 143026, Russia. .,International Center for Materials Design, Northwestern Polytechnical University, 710072, Xi'an, China.
| | - Jung-Fu Lin
- Department of Geological Sciences, The University of Texas at Austin, Austin, TX, 78712, USA.
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28
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Machida A, Saitoh H, Hattori T, Sano-Furukawa A, Funakoshi KI, Sato T, Orimo SI, Aoki K. Hexagonal Close-packed Iron Hydride behind the Conventional Phase Diagram. Sci Rep 2019; 9:12290. [PMID: 31444386 PMCID: PMC6707217 DOI: 10.1038/s41598-019-48817-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 08/12/2019] [Indexed: 11/09/2022] Open
Abstract
Hexagonal close-packed iron hydride, hcp FeHx, is absent from the conventional phase diagram of the Fe-H system, although hcp metallic Fe exists stably over extensive temperature (T) and pressure (P) conditions, including those corresponding to the Earth's inner core. In situ X-ray and neutron diffraction measurements at temperatures ranging from 298 to 1073 K and H pressures ranging from 4 to 7 GPa revealed that the hcp hydride was formed for FeHx compositions when x < 0.6. Hydrogen atoms occupied the octahedral interstitial sites of the host metal lattice both partially and randomly. The hcp hydride exhibited a H-induced volume expansion of 2.48(5) Å3/H-atom, which was larger than that of the face-centered cubic (fcc) hydride. The hcp hydride showed an increase in x with T, whereas the fcc hydride showed a corresponding decrease. The present study provides guidance for further investigations of the Fe-H system over an extensive x-T-P region.
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Affiliation(s)
- Akihiko Machida
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.
| | - Hiroyuki Saitoh
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan
| | - Takanori Hattori
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - Asami Sano-Furukawa
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki, 319-1195, Japan
| | - Ken-Ichi Funakoshi
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society, Shirakata, Tokai, Naka, Ibaraki, 319-1106, Japan
| | - Toyoto Sato
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Shin-Ichi Orimo
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,WPI-Advanced Institute for Materials Research (AIMR), Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Katsutoshi Aoki
- Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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29
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Li X, Huang X, Duan D, Pickard CJ, Zhou D, Xie H, Zhuang Q, Huang Y, Zhou Q, Liu B, Cui T. Polyhydride CeH 9 with an atomic-like hydrogen clathrate structure. Nat Commun 2019; 10:3461. [PMID: 31371729 PMCID: PMC6671988 DOI: 10.1038/s41467-019-11330-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 07/09/2019] [Indexed: 11/08/2022] Open
Abstract
Compression of hydrogen-rich hydrides has been proposed as an alternative way to attain the atomic metallic hydrogen state or high-temperature superconductors. However, it remains a challenge to get access to these states by synthesizing novel polyhydrides with unusually high hydrogen-to-metal ratios. Here we synthesize a series of cerium (Ce) polyhydrides by a direct reaction of Ce and H2 at high pressures. We discover that cerium polyhydride CeH9, formed above 100 GPa, presents a three-dimensional hydrogen network composed of clathrate H29 cages. The electron localization function together with band structure calculations elucidate the weak electron localization between H-H atoms and confirm its metallic character. By means of Ce atom doping, metallic hydrogen structure can be realized via the existence of CeH9. Particularly, Ce atoms play a positive role to stabilize the sublattice of hydrogen cages similar to the recently discovered near-room-temperature lanthanum hydride superconductors.
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Affiliation(s)
- Xin Li
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Chris J Pickard
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Di Zhou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Hui Xie
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Quan Zhuang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Yanping Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Qiang Zhou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Bingbing Liu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
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30
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Boeri L, Bachelet GB. Viewpoint: the road to room-temperature conventional superconductivity. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:234002. [PMID: 30844781 DOI: 10.1088/1361-648x/ab0db2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
It is a honor to write a contribution on this memorial for Sandro Massidda. For both of us, at different stages in our lives, Sandro was first and foremost a friend. We both admired his humble, playful and profound approach to life and physics. In this contribution we describe the route which permitted to meet a long-standing challenge in solid state physics, i.e. room temperature superconductivity. In less than 20 years the critical temperature of conventional superconductors, which in the last century had been widely believed to be limited to 25 K, was raised from 40 K in MgB2 to 265 K in LaH10. This discovery was enabled by the development and application of computational methods for superconductors, a field in which Sandro Massidda played a major role.
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Affiliation(s)
- Lilia Boeri
- Dipartimento di Fisica, Sapienza Università di Roma, 00185 Roma, Italy
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31
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Ikuta D, Ohtani E, Sano-Furukawa A, Shibazaki Y, Terasaki H, Yuan L, Hattori T. Interstitial hydrogen atoms in face-centered cubic iron in the Earth's core. Sci Rep 2019; 9:7108. [PMID: 31068634 PMCID: PMC6506596 DOI: 10.1038/s41598-019-43601-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/24/2019] [Indexed: 11/10/2022] Open
Abstract
Hydrogen is likely one of the light elements in the Earth’s core. Despite its importance, no direct observation has been made of hydrogen in an iron lattice at high pressure. We made the first direct determination of site occupancy and volume of interstitial hydrogen in a face-centered cubic (fcc) iron lattice up to 12 GPa and 1200 K using the in situ neutron diffraction method. The transition temperatures from the body-centered cubic and the double-hexagonal close-packed phases to the fcc phase were higher than reported previously. At pressures <5 GPa, the hydrogen content in the fcc iron hydride lattice (x) was small at x < 0.3, but increased to x > 0.8 with increasing pressure. Hydrogen atoms occupy both octahedral (O) and tetrahedral (T) sites; typically 0.870(±0.047) in O-sites and 0.057(±0.035) in T-sites at 12 GPa and 1200 K. The fcc lattice expanded approximately linearly at a rate of 2.22(±0.36) Å3 per hydrogen atom, which is higher than previously estimated (1.9 Å3/H). The lattice expansion by hydrogen dissolution was negligibly dependent on pressure. The large lattice expansion by interstitial hydrogen reduced the estimated hydrogen content in the Earth’s core that accounted for the density deficit of the core. The revised analyses indicate that whole core may contain hydrogen of 80(±31) times of the ocean mass with 79(±30) and 0.8(±0.3) ocean mass for the outer and inner cores, respectively.
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Affiliation(s)
- Daijo Ikuta
- Department of Earth Science, Tohoku University, Sendai, Miyagi, 980-8578, Japan.
| | - Eiji Ohtani
- Department of Earth Science, Tohoku University, Sendai, Miyagi, 980-8578, Japan.
| | - Asami Sano-Furukawa
- Materials and Life Science Division, Japan Proton Accelerator Research Complex (J-PARC) Center, Japan Atomic Energy Agency, Naka, Ibaraki, 319-1195, Japan
| | - Yuki Shibazaki
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan.,National Institute for Materials Science, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hidenori Terasaki
- Department of Earth and Space Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
| | - Liang Yuan
- Department of Earth Science, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - Takanori Hattori
- Materials and Life Science Division, Japan Proton Accelerator Research Complex (J-PARC) Center, Japan Atomic Energy Agency, Naka, Ibaraki, 319-1195, Japan
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32
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Liu C, Jiang S, Sui Y, Chen Y, Xiao G, Chen XJ, Shu H, Duan D, Li X, Liu H, Zou B. Effect of the Inherent Structure of Rh Nanocrystals on the Hydriding Behavior under Pressure. J Phys Chem Lett 2019; 10:774-779. [PMID: 30724568 DOI: 10.1021/acs.jpclett.9b00216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tailoring the inherent structure of materials is an effective way to improve the hydrogen storage capacity of metal materials. In this work, we report the effect of rhodium (Rh) nanocrystals (NCs) on the hydrogenation reaction. We found that Rh NCs could form rhodium monohydride (RhH) at a lower pressure than the bulk Rh because of its high specific surface area and structure defects. In addition, Rh NCs in the form of icosahedrons exhibited a much higher hydrogen absorption efficiency than Rh nanocubes. Furthermore, much smaller irregular Rh nanoparticles are even partially converted to RhH at lower pressure because of the nanosize effect. We thus believe that it is possible to design materials with excellent hydrogen storage properties under mild conditions.
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Affiliation(s)
- Chuang Liu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Shuqing Jiang
- Key Laboratory of Materials Physics, Institute of Solid State Physics , Chinese Academy of Sciences , Hefei 230000 , China
| | - Yongming Sui
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Yaping Chen
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Guanjun Xiao
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Xiao-Jia Chen
- Key Laboratory of Materials Physics, Institute of Solid State Physics , Chinese Academy of Sciences , Hefei 230000 , China
- Center for High Pressure Science and Technology Advanced Research , Shanghai 211203 , China
| | - Haiyun Shu
- Center for High Pressure Science and Technology Advanced Research , Shanghai 211203 , China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Xue Li
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Hanyu Liu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
| | - Bo Zou
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , P.R. China
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33
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34
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Zurek E, Bi T. High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective. J Chem Phys 2019; 150:050901. [DOI: 10.1063/1.5079225] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Eva Zurek
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
| | - Tiange Bi
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
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35
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Xue Z, Shen Y, Li P, Zhang Y, Li J, Qin B, Zhang J, Zeng Y, Zhu S. Key Role of Lanthanum Oxychloride: Promotional Effects of Lanthanum in NiLaO y /NaCl for Hydrogen Production from Ethyl Acetate and Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800927. [PMID: 30028571 DOI: 10.1002/smll.201800927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/24/2018] [Indexed: 06/08/2023]
Abstract
The hydrogen economy is accelerating technological evolutions toward highly efficient hydrogen production. In this work, the catalytic performance of NiO/NaCl for hydrogen production via autothermal reforming of ethyl acetate and water is further improved through lanthanum modification, and the resulted 3%-NiLaOy /NaCl catalyst achieves as high as 93% H2 selectivity and long-term stability at 600 °C. The promoting effect is caused by the strong interactions between lanthanum and NiO/NaCl, by which LaNiO3 and a novel LaOCl phase are formed. The key role of LaOCl in promoting low-temperature hydrogen production is highlighted, while effects of LaNiO3 are well known. The LaOCl (010) facet possesses high adsorption capacity toward co-chemisorbing ethyl acetate and water. LaOCl strongly interacts with ethyl acetate and H2 O in the form of hydrogen bonding and coordination effect. The interactions induce tensions inside ethyl acetate and H2 O, activate the molecules, and hence decrease the energy barrier for reaction. In situ Fourier transform infrared spectroscopy (FTIR) reveals that LaOCl along with NaCl enhances the adsorption ability of NiO/NaCl. Moreover, LaOCl improves the dispersion of Ni species in NiO-LaNiO3 -LaOCl nanosheets, which possess abundant active sites. The effects together promote hydrogen evolution. Furthermore, the NiLaOy /NaCl catalyst can be easily reborn after deactivation due to the water solubility of NaCl.
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Affiliation(s)
- Zhiwei Xue
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Yuesong Shen
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Peiwen Li
- Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ, 85721, USA
| | - Yu Zhang
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Junjie Li
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Bin Qin
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Jin Zhang
- Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, E-08193, Barcelona, Catalonia, Spain
| | - Yanwei Zeng
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Shemin Zhu
- College of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
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Wang M, Binns J, Donnelly ME, Peña-Alvarez M, Dalladay-Simpson P, Howie RT. High pressure synthesis and stability of cobalt hydrides. J Chem Phys 2018; 148:144310. [DOI: 10.1063/1.5026535] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Mengnan Wang
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Jack Binns
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Mary-Ellen Donnelly
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Miriam Peña-Alvarez
- School of Physics and Astronomy and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - Philip Dalladay-Simpson
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
| | - Ross T. Howie
- Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Bldg. 6, Pudong, Shanghai 201203, People’s Republic of China
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Abstract
The recent discovery of superconductivity above 200 K in hydrogen sulfide under high pressure marks a milestone in superconductor research. Not only does its critical temperature Tc exceed the previous record in cuprates by more than 50 K, the superconductivity in hydrogen sulfide also exhibits convincing evidence that it is of conventional phonon-mediated type. Moreover, this is the first time that a previously unknown high-Tc superconductor is predicted by theory and afterwards verified by experiment. In this Minireview, we survey the progress made in the last three years in understanding this novel material, and discuss unsolved problems and possible developments to encourage future investigations.
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Affiliation(s)
- Yansun Yao
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada.,Canadian Light Source, Saskatoon, Saskatchewan, S7N 2V3, Canada
| | - John S Tse
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
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Wang L, Duan D, Yu H, Xie H, Huang X, Ma Y, Tian F, Li D, Liu B, Cui T. High-Pressure Formation of Cobalt Polyhydrides: A First-Principle Study. Inorg Chem 2017; 57:181-186. [DOI: 10.1021/acs.inorgchem.7b02371] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liyuan Wang
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Defang Duan
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Hongyu Yu
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Hui Xie
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Yanbin Ma
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Fubo Tian
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Da Li
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Bingbing Liu
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College
of Physics, Jilin University, Changchun, 130012, P. R. China
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Geballe ZM, Liu H, Mishra AK, Ahart M, Somayazulu M, Meng Y, Baldini M, Hemley RJ. Synthesis and Stability of Lanthanum Superhydrides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709970] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zachary M. Geballe
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
| | - Hanyu Liu
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
| | - Ajay K. Mishra
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
- Permanent address: HP&SRPD Bhabha Atomic Research Center Mumbai-85 India
| | - Muhtar Ahart
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
| | - Maddury Somayazulu
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
| | - Yue Meng
- HPCAT Geophysical Laboratory Carnegie Institution of Washington Argonne IL 60439 USA
| | - Maria Baldini
- Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
| | - Russell J. Hemley
- Institute of Materials Science and Department of Civil and Environmental Engineering The George Washington University Washington DC 20052 USA
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40
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Synthesis and Stability of Lanthanum Superhydrides. Angew Chem Int Ed Engl 2017; 57:688-692. [DOI: 10.1002/anie.201709970] [Citation(s) in RCA: 151] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/07/2022]
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