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Guan D, Zhou J, Huang YC, Dong CL, Wang JQ, Zhou W, Shao Z. Screening highly active perovskites for hydrogen-evolving reaction via unifying ionic electronegativity descriptor. Nat Commun 2019; 10:3755. [PMID: 31434892 PMCID: PMC6704169 DOI: 10.1038/s41467-019-11847-w] [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: 03/20/2019] [Accepted: 08/07/2019] [Indexed: 11/18/2022] Open
Abstract
Facile and reliable screening of cost-effective, high-performance and scalable electrocatalysts is key for energy conversion technologies such as water splitting. ABO3-δ perovskites, with rich constitutions and structures, have never been designed via activity descriptors for critical hydrogen evolution reaction (HER). Here, we apply coordination rationales to introduce A-site ionic electronegativity (AIE) as an efficient unifying descriptor to predict the HER activities of 13 cobalt-based perovskites. Compared with A-site structural or thermodynamic parameter, AIE endows the HER activity with the best volcano trend. (Gd0.5La0.5)BaCo2O5.5+δ predicted from an AIE value of ~2.33 exceeds the state-of-the-art Pt/C catalyst in electrode activity and stability. X-ray absorption and computational studies reveal that the peak HER activities at a moderate AIE value of ~2.33 can be associated with the optimal electronic states of active B-sites via inductive effect in perovskite structure (~200 nm depth), including Co valence, Co-O bond covalency, band gap and O 2p-band position. Facile and reliable screening of efficient electrocatalysts is important for energy conversion technologies such as water splitting. Here, authors introduce A-site ionic electronegativity as a descriptor to understand the hydrogen-evolution activities of cobalt-based perovskites.
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Affiliation(s)
- Daqin Guan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211800, China
| | - Jing Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Yu-Cheng Huang
- Department of Physics, Tamkang University, 151 Yingzhuan Rd., New Taipei City, 25137, Taiwan
| | - Chung-Li Dong
- Department of Physics, Tamkang University, 151 Yingzhuan Rd., New Taipei City, 25137, Taiwan
| | - Jian-Qiang Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Wei Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211800, China.
| | - Zongping Shao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211800, China.
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Iwaya K, Ohsawa T, Shimizu R, Okada Y, Hitosugi T. Atomic-scale visualization of oxide thin-film surfaces. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2018; 19:282-290. [PMID: 29707068 PMCID: PMC5917431 DOI: 10.1080/14686996.2018.1442616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/15/2018] [Accepted: 02/15/2018] [Indexed: 06/08/2023]
Abstract
The interfaces of complex oxide heterostructures exhibit intriguing phenomena not observed in their constituent materials. The oxide thin-film growth of such heterostructures has been successfully controlled with unit-cell precision; however, atomic-scale understandings of oxide thin-film surfaces and interfaces have remained insufficient. We examined, with atomic precision, the surface and electronic structures of oxide thin films and their growth processes using low-temperature scanning tunneling microscopy. Our results reveal that oxide thin-film surface structures are complicated in contrast to the general perception and that atomically ordered surfaces can be achieved with careful attention to the surface preparation. Such atomically ordered oxide thin-film surfaces offer great opportunities not only for investigating the microscopic origins of interfacial phenomena but also for exploring new surface phenomena and for studying the electronic states of complex oxides that are inaccessible using bulk samples.
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Affiliation(s)
- Katsuya Iwaya
- Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Japan
- Center for Emergent Matter Science, RIKEN, Saitama, Japan
| | - Takeo Ohsawa
- Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Japan
- National Institute for Materials Research, Ibaraki, Japan
| | - Ryota Shimizu
- Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Japan
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Yoshinori Okada
- Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Japan
| | - Taro Hitosugi
- Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Japan
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo, Japan
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3
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Abstract
The pressure-response of the Co-O bond lengths and the spin state of Co ions in a hybrid 3d-5d solid-state oxide Sr2Co0.5Ir0.5O4 with a layered K2NiF4-type structure was studied by using hard X-ray absorption and emission spectroscopies. The Co-K and the Ir-L3 X-ray absorption spectra demonstrate that the Ir5+ and the Co3+ valence states at ambient conditions are not affected by pressure. The Co Kβ emission spectra, on the other hand, revealed a gradual spin state transition of Co3+ ions from a high-spin (S = 2) state at ambient pressure to a complete low-spin state (S = 0) at 40 GPa without crossing the intermediate spin state (S = 1). This can be well understood from our calculated phase diagram in which we consider the energies of the low spin, intermediate spin and high spin states of Co3+ ions as a function of the anisotropic distortion of the octahedral local coordination in the layered oxide. We infer that a short in-plane Co-O bond length (<1.90 Å) as well as a very large ratio of Co-Oapex/Co-Oin-plane is needed to stabilize the IS Co3+, a situation which is rarely met in reality.
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Mikhailova D, Hu Z, Kuo C, Oswald S, Mogare KM, Agrestini S, Lee J, Pao C, Chen S, Lee J, Haw S, Chen J, Liao Y, Ishii H, Tsuei K, Senyshyn A, Ehrenberg H. Charge Transfer and Structural Anomaly in Stoichiometric Layered Perovskite Sr
2
Co
0.5
Ir
0.5
O
4. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600970] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Daria Mikhailova
- Karlsruhe Institute of Technology (KIT) Institute for Applied Materials (IAM) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
- Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
- Institute for Complex Materials IFW Dresden Helmholtzstr. 20 01069 Dresden Germany
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
| | - Chang‐Yang Kuo
- Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
| | - Steffen Oswald
- Institute for Complex Materials IFW Dresden Helmholtzstr. 20 01069 Dresden Germany
| | - Kailash M. Mogare
- Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
| | - Stefano Agrestini
- Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
| | - Jyh‐Fu Lee
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Chin‐Wen Pao
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Shin‐An Chen
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Jenn‐Min Lee
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Shu‐Chih Haw
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Jin‐Ming Chen
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Yen‐Fa Liao
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Hirofumi Ishii
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Ku‐Ding Tsuei
- National Synchrotron Radiation Research Center (NSRRC) 101 Hsin‐Ann Road 30077 Hsinchu Taiwan
| | - Anatoliy Senyshyn
- Forschungsneutronenquelle Heinz Maier‐Leibnitz FRM‐II Technische Universität München Lichtenbergstr. 1 85747 Garching bei München Germany
| | - Helmut Ehrenberg
- Karlsruhe Institute of Technology (KIT) Institute for Applied Materials (IAM) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
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5
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Magnetization and magneto-transport staircaselike behavior in layered perovskite Sr2CoO4 at low temperature. Sci Rep 2016; 6:27712. [PMID: 27293142 PMCID: PMC4904195 DOI: 10.1038/srep27712] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 05/24/2016] [Indexed: 11/09/2022] Open
Abstract
Polycrystalline layered perovskite Sr2CoO4 sample was synthesized by high temperature and high pressure method. The staircaselike behavior has been observed in the magnetization and resistivity versus field curves of Sr2CoO4 at low temperature. The main features of the steps can be obtained from the measured results: (i) the positions of the external magnetic field at which steps occur are varying in different measurement runs, (ii) the steps only appear at low temperature and disappear with a slight increase of the temperature, (iii) the steps are dependent on the temperature and field sweep rate. Based on the features of the magnetization and magneto-transport staircaselike behavior in Sr2CoO4, the unusual phenomenon can be ascribed to an avalanche of flipping domains in terms of the random field theory.
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Daza YA, Kent RA, Yung MM, Kuhn JN. Carbon Dioxide Conversion by Reverse Water–Gas Shift Chemical Looping on Perovskite-Type Oxides. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5002185] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yolanda A. Daza
- University of South Florida, Tampa, Florida 33620, United States
| | - Ryan A. Kent
- University of South Florida, Tampa, Florida 33620, United States
| | - Matthew M. Yung
- National
Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - John N. Kuhn
- University of South Florida, Tampa, Florida 33620, United States
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7
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Chen JM, Chin YY, Valldor M, Hu Z, Lee JM, Haw SC, Hiraoka N, Ishii H, Pao CW, Tsuei KD, Lee JF, Lin HJ, Jang LY, Tanaka A, Chen CT, Tjeng LH. A complete high-to-low spin state transition of trivalent cobalt ion in octahedral symmetry in SrCo0.5Ru0.5O(3-δ). J Am Chem Soc 2014; 136:1514-9. [PMID: 24410074 DOI: 10.1021/ja4114006] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complex metal oxide SrCo0.5Ru0.5O(3-δ) possesses a slightly distorted perovskite crystal structure. Its insulating nature infers a well-defined charge distribution, and the six-fold coordinated transition metals have the oxidation states +5 for ruthenium and +3 for cobalt as observed by X-ray spectroscopy. We have discovered that Co(3+) ion is purely high-spin at room temperature, which is unique for a Co(3+) in an octahedral oxygen surrounding. We attribute this to the crystal field interaction being weaker than the Hund's-rule exchange due to a relatively large mean Co-O distances of 1.98(2) Å, as obtained by EXAFS and X-ray diffraction experiments. A gradual high-to-low spin state transition is completed by applying high hydrostatic pressure of up to 40 GPa. Across this spin state transition, the Co Kβ emission spectra can be fully explained by a weighted sum of the high-spin and low-spin spectra. Thereby is the much debated intermediate spin state of Co(3+) absent in this material. These results allow us to draw an energy diagram depicting relative stabilities of the high-, intermediate-, and low-spin states as functions of the metal-oxygen bond length for a Co(3+) ion in an octahedral coordination.
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Affiliation(s)
- Jin-Ming Chen
- National Synchrotron Radiation Research Center , 101 Hsin Ann Road, Hsinchu 30076, Taiwan, R.O.C
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8
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Shi Y, Guo Y, Shirako Y, Yi W, Wang X, Belik AA, Matsushita Y, Feng HL, Tsujimoto Y, Arai M, Wang N, Akaogi M, Yamaura K. High-Pressure Synthesis of 5d Cubic Perovskite BaOsO3 at 17 GPa: Ferromagnetic Evolution over 3d to 5d Series. J Am Chem Soc 2013; 135:16507-16. [DOI: 10.1021/ja4074408] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Youguo Shi
- Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Yanfeng Guo
- Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yuichi Shirako
- Department
of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Wei Yi
- International
Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Xia Wang
- Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Alexei A. Belik
- International
Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yoshitaka Matsushita
- Materials
Analysis Station, National Institute for Materials Science, 1-2-1
Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Hai Luke Feng
- Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yoshihiro Tsujimoto
- Materials
Processing Unit, National Institute for Materials Science, 1-2-1
Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Masao Arai
- Computational
Materials Science Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Nanlin Wang
- Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Masaki Akaogi
- Department
of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Kazunari Yamaura
- Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
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10
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Long Y, Kaneko Y, Ishiwata S, Taguchi Y, Tokura Y. Synthesis of cubic SrCoO3 single crystal and its anisotropic magnetic and transport properties. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:245601. [PMID: 21628787 DOI: 10.1088/0953-8984/23/24/245601] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A large-size single crystal of nearly stoichiometric SrCoO(3) was prepared with a two-step method combining the floating-zone technique and subsequent high oxygen pressure treatment. SrCoO(3) crystallizes in a cubic perovskite structure with space group Pm3m, and displays an itinerant ferromagnetic behavior with the Curie temperature of 305 K. The easy magnetization axis is found to be along the [111] direction, and the saturation moment is 2.5 µ(B)/f.u., in accord with the picture of the intermediate spin state. The resistivity at low temperatures (T) is proportional to T(2), indicative of the possible effect of orbital fluctuation in the intermediate spin ferromagnetic metallic state. Unusual anisotropic magnetoresistance is also observed and its possible origin is discussed.
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Affiliation(s)
- Youwen Long
- Exploratory Research for Advanced Technology, Japan Science and Technology Agency, c/o RIKEN Advanced Science Institute, Wako, Japan.
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Demont A, Hébert S, Pelloquin D, Maignan A. The Sr2.75Ce0.25Co2O7−δ oxide, n=2 member of the Ruddlesden–Popper series: Structural and magnetic evolution depending on oxygen stoichiometry. J SOLID STATE CHEM 2008. [DOI: 10.1016/j.jssc.2008.02.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Ishiwata S, Terasaki I, Azuma M, Takano M. High pressure synthesis and structure of a new magnetoplumbite-type cobalt oxide SrCo12O19. J SOLID STATE CHEM 2008. [DOI: 10.1016/j.jssc.2008.02.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Viciu L, Zandbergen H, Xu Q, Huang Q, Lee M, Cava R. Structure and magnetic properties of the orthorhombic n=2 Ruddlesden–Popper phases Sr3Co2O5+δ (δ=0.91, 0.64 and 0.38). J SOLID STATE CHEM 2006. [DOI: 10.1016/j.jssc.2005.11.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Matsuno J, Okimoto Y, Kawasaki M, Tokura Y. Variation of the electronic structure in systematically synthesized Sr2MO4 (M = Ti, V, Cr, Mn, and Co). PHYSICAL REVIEW LETTERS 2005; 95:176404. [PMID: 16383844 DOI: 10.1103/physrevlett.95.176404] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2005] [Indexed: 05/05/2023]
Abstract
We have systematically synthesized single-crystalline thin films of layered perovskites Sr2MO4 (M = Ti, V, Cr, Mn, and Co) which cannot be obtained in a form of bulk crystal apart from M = Mn. The two-dimensional electronic structure of these M4+ oxides, ranging from a correlated insulator to a ferromagnetic metal, has been investigated by using their optical conductivity spectra with polarizations E is perpendicular to c and E is parallel to c, which reveal systematic variation of the correlated charge gap, Mott-Hubbard gap, or charge-transfer gap. Temperature dependence of the gap-transition spectra is argued in the light of possible spin and/or orbital ordering.
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Affiliation(s)
- J Matsuno
- Spin SuperStructure Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation, c/o AIST, Tsukuba Central 4, Tsukuba 305-8562, Japan
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