1
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Wang L, Ma Z, Xue J, Dong Y, Chen LW, Gu Y, Shi H. Structure evolution and specific effects for the catalysis of atomically ordered intermetallic compounds. NANOSCALE 2024; 16:14687-14706. [PMID: 38979693 DOI: 10.1039/d4nr01939c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Atomically ordered intermetallic compounds (IMCs) have been extensively studied for exploring catalysts with high activity, selectivity, and longevity. Compared to random alloys, IMCs present a more pronounced geometric and electronic effect with desirable catalytic performance. Their well-defined structure makes IMCs ideal model catalysts for studying the catalytic mechanism. This review focuses especially on elemental composition, electron transfer, and structure/phase evolution under high temperature treatment conditions, providing direct evidence for the migration and rearrangement of metal atoms through electron microscopy. We then present the outstanding applications of IMCs in growing single-walled nanotubes, hydrogenation/dehydrogenation reactions, and electrocatalysis from the perspective of electronic, geometric, strain, and bifunctional effects of ordered IMCs. Finally, the current obstacles associated with the use of in situ techniques are proposed, as well as future research possibilities.
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Affiliation(s)
- Lei Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Zequan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Jia Xue
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Yilin Dong
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Lin-Wei Chen
- School of Pharmacy & Institute of Pharmaceutics, Anhui University of Chinese Medicine, Hefei, 230012, China.
| | - Yu Gu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Hui Shi
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
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2
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Sun Y, Ellis A, Diaz S, Li W, Miao M. Constructing Tunable Electrides on Monolayer Transition Metal Dichalcogenides. J Phys Chem Lett 2024; 15:6174-6182. [PMID: 38836596 DOI: 10.1021/acs.jpclett.4c01263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Electrides have emerged as promising materials with exotic properties due to the presence of localized electrons detached from all atoms. Despite the continuous discovery of many new electrides, most of them are based on atypical compositions, and their applications require an inert surface structure to passivate reactive excess electrons. Here, we demonstrate a different route to attain tunable electrides. We first report that monolayer transition metal dichalcogenides (TMDCs) exhibit weak electride characteristics, which is the remainder of the electride feature of the transition metal sublattice. By introducing chalcogen vacancies, the enhanced electride characteristics are comparable to those of known electrides. Since the precise tailoring of the chalcogen vacancy concentration has been achieved experimentally, we proposed that TMDCs can be used to build electrides with controllable intensities. Furthermore, we demonstrate that the electride states at the chalcogen vacancy of monolayer TMDCs will play an important role in catalyzing hydrogen evolution reactions.
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Affiliation(s)
- Yuanhui Sun
- Suzhou Laboratory, Suzhou, Jiangsu 215123, P. R. China
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330, United States
| | - Austin Ellis
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330, United States
| | - Saul Diaz
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330, United States
| | - Wei Li
- Suzhou Laboratory, Suzhou, Jiangsu 215123, P. R. China
- Gusu Laboratory of Materials, Suzhou, Jiangsu 215123, P. R. China
| | - Maosheng Miao
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330, United States
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3
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Park I, He Y, Mao H, Shim JH, Kim DY. Electride Formation of HCP-Iron at High Pressure: Unraveling the Origin of the Superionic State of Iron-Rich Compounds in Rocky Planets. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308177. [PMID: 38605671 PMCID: PMC11200003 DOI: 10.1002/advs.202308177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 02/25/2024] [Indexed: 04/13/2024]
Abstract
Electride possesses electrons localized at interstitial sites without attracting nuclei. It brings outstanding material properties not only originating from its own loosely bounded characteristics but also serving as a quasiatom, which even chemically interacts with other elemental ions. In elemental metals, electride transitions have been reported in alkali metals where valence electrons can easily gain enough kinetic energy to escape nuclei. However, there are few studies on transition metals. Especially iron, the key element of human technology and geophysics, has not been studied in respect of electride formation. In this study, it is demonstrated that electride formation drives the superionic state in iron hydride under high-pressure conditions of the earth's inner core. The electride stabilizes the iron lattice and provides a pathway for hydrogen diffusion by severing the direct interaction between the metal and the volatile element. The coupling between lattice stability and superionicity is triggered near 100 GPa and enhanced at higher pressures. It is shown that the electride-driven superionicity can also be generalized for metal electrides and other rocky planetary cores by providing a fundamental interaction between the electride of the parent metal and doped light elements.
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Affiliation(s)
- Ina Park
- Department of ChemistryPohang University of Science and TechnologyPohang37673Republic of Korea
| | - Yu He
- Center for High‐pressure Science and Technology Advanced Research (HPSTAR)Shanghai201203China
- Key Laboratory of High‐Temperature and High‐Pressure Study of the Earth's InteriorInstitute of GeochemistryChinese Academy of SciencesGuiyang550081China
| | - Ho‐kwang Mao
- Center for High‐pressure Science and Technology Advanced Research (HPSTAR)Shanghai201203China
| | - Ji Hoon Shim
- Department of ChemistryPohang University of Science and TechnologyPohang37673Republic of Korea
- Department of PhysicsPohang University of Science and TechnologyPohang37673Republic of Korea
| | - Duck Young Kim
- Center for High‐pressure Science and Technology Advanced Research (HPSTAR)Shanghai201203China
- Division of Advanced Nuclear EngineeringPohang University of Science and TechnologyPohang37673Republic of Korea
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4
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Wang Z, Gong Y, Evans ML, Yan Y, Wang S, Miao N, Zheng R, Rignanese GM, Wang J. Machine Learning-Accelerated Discovery of A2BC2 Ternary Electrides with Diverse Anionic Electron Densities. J Am Chem Soc 2023; 145:26412-26424. [PMID: 37988742 DOI: 10.1021/jacs.3c10538] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
This study combines machine learning (ML) and high-throughput calculations to uncover new ternary electrides in the A2BC2 family of compounds with the P4/mbm space group. Starting from a library of 214 known A2BC2 phases, density functional theory calculations were used to compute the maximum value of the electron localization function, indicating that 42 are potential electrides. A model was then trained on this data set and used to predict the electride behavior of 14,437 hypothetical compounds generated by structural prototyping. Then, the stability and electride features of the 1254 electride candidates predicted by the model were carefully checked by high-throughput calculations. Through this tiered approach, 41 stable and 104 metastable new A2BC2 electrides were predicted. Interestingly, all three kinds of electrides, i.e., electron-deficient, electron-neutral, and electron-rich electrides, are present in the set of predicted compounds. Three of the most promising new electrides (two electron-rich, Nd2ScSi2 and La2YbGe2, and one electron-deficient Y2LiSi2) were then successfully synthesized and characterized experimentally. Furthermore, the synthesized electrides were found to exhibit high catalytic activities for NH3 synthesis under mild conditions when Ru-loaded. The electron-deficient Y2LiSi2, in particular, was seen to exhibit a good balance of catalytic activity and chemical stability, suggesting its future application in catalysis.
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Affiliation(s)
- Zhiqi Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Yutong Gong
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Matthew L Evans
- IMCN-MODL, Université Catholique de Louvain, Chemin des Étoiles, 8, Louvain-la-Neuve B-1348, Belgium
| | - Yujing Yan
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Shiyao Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Nanxi Miao
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Ruiheng Zheng
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Gian-Marco Rignanese
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
- IMCN-MODL, Université Catholique de Louvain, Chemin des Étoiles, 8, Louvain-la-Neuve B-1348, Belgium
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
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5
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Li H, Gong Y, Yang H, Yang X, Li K, Wang J, Hosono H. Ammonia Synthesis on Ternary LaSi-based Electrides: Tuning the Catalytic Mechanism by the Third Metal. CHEMSUSCHEM 2023; 16:e202301016. [PMID: 37584595 DOI: 10.1002/cssc.202301016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
Intermetallic electrides have recently drawn considerable attention due to their unique electronic structure and high catalytic performance for the activation of inert chemical bonds under mild conditions. However, the relationship between electride (anionic) electron abundance and catalytic performance is undefined; the key deciding factor for the performance of intermetallic electride catalysts remains to be addressed. Here, the secret behind electride catalysts La-TM-Si (TM=Co, Fe and Mn) with the same crystal structure but different anionic electrons was studied. Unexpectedly, LaCoSi with the least anionic electrons showed the best catalytic activity. The experiments and first-principles calculations showed that the electride anions promote the N2 dissociation which alters the rate-determining step (RDS) for ammonia synthesis on the studied electrides. Different reaction mechanisms were found for La-TM-Si (TM=Fe, Co) and LaMnSi. A dual-site module was revealed for LaCoSi and LaFeSi, in which transition metals were available for the N2 dissociation and La accelerates the NHx formation, respectively, breaking the Sabatier scaling relation. For LaMnSi, which is the most efficient for the N2 activation, the activity for ammonia synthesis is limited and confined by the scaling relations. The findings provide new insight into the working mechanism of intermetallic electrides.
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Affiliation(s)
- Hongchen Li
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Yutong Gong
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Hongliang Yang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Xiao Yang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Ke Li
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Hideo Hosono
- MDX Research Center for Element Strategy, International Research Frontiers Initiative, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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6
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Arroyo-Caire J, Diaz-Perez MA, Lara-Angulo MA, Serrano-Ruiz JC. A Conceptual Approach for the Design of New Catalysts for Ammonia Synthesis: A Metal-Support Interactions Review. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2914. [PMID: 37999267 PMCID: PMC10674330 DOI: 10.3390/nano13222914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023]
Abstract
The growing interest in green ammonia production has spurred the development of new catalysts with the potential to carry out the Haber-Bosch process under mild pressure and temperature conditions. While there is a wide experimental background on new catalysts involving transition metals, supports and additives, the fundamentals behind ammonia synthesis performance on these catalysts remained partially unsolved. Here, we review the most important works developed to date and analyze the traditional catalysts for ammonia synthesis, as well as the influence of the electron transfer properties of the so-called 3rd-generation catalysts. Finally, the importance of metal-support interactions is highlighted as an effective pathway for the design of new materials with potential to carry out ammonia synthesis at low temperatures and pressures.
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Affiliation(s)
| | | | | | - Juan Carlos Serrano-Ruiz
- Materials and Sustainability Group, Department of Engineering, Universidad Loyola Andalucía, Avda. de las Universidades s/n, Dos Hermanas, 41704 Seville, Spain; (J.A.-C.); (M.A.D.-P.); (M.A.L.-A.)
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7
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Li Z, Lu Y, Li J, Xu M, Qi Y, Park SW, Kitano M, Hosono H, Chen JS, Ye TN. Multiple reaction pathway on alkaline earth imide supported catalysts for efficient ammonia synthesis. Nat Commun 2023; 14:6373. [PMID: 37821432 PMCID: PMC10567757 DOI: 10.1038/s41467-023-42050-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/27/2023] [Indexed: 10/13/2023] Open
Abstract
The tunability of reaction pathways is required for exploring efficient and low cost catalysts for ammonia synthesis. There is an obstacle by the limitations arising from scaling relation for this purpose. Here, we demonstrate that the alkali earth imides (AeNH) combined with transition metal (TM = Fe, Co and Ni) catalysts can overcome this difficulty by utilizing functionalities arising from concerted role of active defects on the support surface and loaded transition metals. These catalysts enable ammonia production through multiple reaction pathways. The reaction rate of Co/SrNH is as high as 1686.7 mmol·gCo-1·h-1 and the TOFs reaches above 500 h-1 at 400 °C and 0.9 MPa, outperforming other reported Co-based catalysts as well as the benchmark Cs-Ru/MgO catalyst and industrial wüstite-based Fe catalyst under the same reaction conditions. Experimental and theoretical results show that the synergistic effect of nitrogen affinity of 3d TMs and in-situ formed NH2- vacancy of alkali earth imides regulate the reaction pathways of the ammonia production, resulting in distinct catalytic performance different from 3d TMs. It was thus demonstrated that the appropriate combination of metal and support is essential for controlling the reaction pathway and realizing highly active and low cost catalysts for ammonia synthesis.
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Affiliation(s)
- Zichuang Li
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yangfan Lu
- College of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China
| | - Jiang Li
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Miao Xu
- State Key Laboratory of Space Power Sources, Shanghai Institute of Space Power-Sources, Shanghai, 200245, China
| | - Yanpeng Qi
- School of Physical Science and Technology Shanghai Tech University, Shanghai, 201210, China
- ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai, 201210, China
- Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai, 201210, China
| | - Sang-Won Park
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
| | - Jie-Sheng Chen
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Tian-Nan Ye
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
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8
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Baik Y, Kwen M, Lee K, Chi S, Lee S, Cho K, Kim H, Choi M. Splitting of Hydrogen Atoms into Proton-Electron Pairs at BaO-Ru Interfaces for Promoting Ammonia Synthesis under Mild Conditions. J Am Chem Soc 2023; 145:11364-11374. [PMID: 37183414 DOI: 10.1021/jacs.3c02529] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Ru catalysts promoted with alkali and alkaline earth have shown superior ammonia (NH3) synthesis activities under mild conditions. Although these promoters play a vital role in enhancing catalytic activity, their function has not been clearly understood. Here, we synthesize a series of Ba-Ru/MgO catalysts with an optimal Ru particle size (∼2.3 nm) and tailored BaO-Ru interfacial structures. We discover that the promoting effect is created through the separate storage of H+/e- pairs at the BaO-Ru interface. Chemisorbed H atoms on Ru dissociate into H+/e- pairs at the BaO-Ru interface, where strongly basic, nonreducible BaO selectively captures H+ while leaving e- on Ru. The resulting electron accumulation in Ru facilitates N2 activation via enhanced π-backdonation and inhibits hydrogen poisoning during NH3 synthesis. Consequently, the formation of intimate BaO-Ru interface without an excessive loss of accessible Ru sites enables the synthesis of highly active catalysts for NH3 synthesis.
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Affiliation(s)
- Yaejun Baik
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Minjae Kwen
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kyungho Lee
- Clean Fuel Research Laboratory, Korea Institute of Energy Research, Daejeon 34127, Republic of Korea
| | - Seunghyuck Chi
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Susung Lee
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kanghee Cho
- Department of Chemistry and Chemical Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Minkee Choi
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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Sinha Roy R, Ghosh A, Banerjee S, Ghosh S, Das AK. New kind of electride sandwich complexes based on the cyclooctatetraene ligand M 12(η 8-C 8H 8) 2M 22 (M 1 = Na, K and M 2 = Ca, Mg): a theoretical study. Phys Chem Chem Phys 2023; 25:4710-4723. [PMID: 36661858 DOI: 10.1039/d2cp04127h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the present study, the electronic structures of a series of binuclear sandwich complexes based on the cyclooctatetraene ligand M12(η8-C8H8)2M22 (M1 = Na, K and M2 = Ca, Mg) are studied theoretically. Each cyclooctatetraene ligand binds with the metal in the η8 binding mode. The M2-M2 bond length agrees well with the reported bimetallic covalent Ca2 and Mg2 bond lengths. The Wiberg bond index (WBI) also indicates the presence of covalent M2-M2 bonds, which gives additional stability to the complex. A non-nuclear attractor (NNA) is found in-between the M2-M2 bond and the negative Laplacian of the electron density is found at the NNA. Noncovalent interaction (NCI) plot shows that electron density is localized at the M2-M2 bond. Based on the performed analysis, we have concluded that the designed sandwich complexes are electrides. We herein report, for the first time, the electride sandwich complexes of the cyclooctatetraene ligand. Due to the presence of a diffuse electron system, the electride complexes exhibit higher values of the static second hyperpolarizability within the range of 2.6 × 105 to 1.4 × 106 a.u. Among the studied complexes, M12(η8-C8H8)2Ca2 exhibit a higher value of static second hyperpolarizability.
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Affiliation(s)
- Ria Sinha Roy
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Avik Ghosh
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Soumadip Banerjee
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Suniti Ghosh
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Abhijit K Das
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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10
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Kim H, Jan A, Kwon DH, Ji HI, Yoon KJ, Lee JH, Jun Y, Son JW, Yang S. Exsolution of Ru Nanoparticles on BaCe 0.9 Y 0.1 O 3-δ Modifying Geometry and Electronic Structure of Ru for Ammonia Synthesis Reaction Under Mild Conditions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205424. [PMID: 36464649 DOI: 10.1002/smll.202205424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Green ammonia is an efficient, carbon-free energy carrier and storage medium. The ammonia synthesis using green hydrogen requires an active catalyst that operates under mild conditions. The catalytic activity can be promoted by controlling the geometry and electronic structure of the active species. An exsolution process is implemented to improve catalytic activity by modulating the geometry and electronic structure of Ru. Ru nanoparticles exsolved on a BaCe0.9 Y0.1 O3-δ support exhibit uniform size distribution, 5.03 ± 0.91 nm, and exhibited one of the highest activities, 387.31 mmolNH3 gRu -1 h-1 (0.1 MPa and 450 °C). The role of the exsolution and BaCe0.9 Y0.1 O3-δ support is studied by comparing the catalyst with control samples and in-depth characterizations. The optimal nanoparticle size is maintained during the reaction, as the Ru nanoparticles prepared by exsolution are well-anchored to the support with in-plane epitaxy. The electronic structure of Ru is modified by unexpected in situ Ba promoter accumulation around the base of the Ru nanoparticles.
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Affiliation(s)
- Hayoung Kim
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, 02841, Republic of Korea
| | - Asif Jan
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, 02792, Republic of Korea
| | - Deok-Hwang Kwon
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Ho-Il Ji
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, 02792, Republic of Korea
| | - Kyung Joong Yoon
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Yonsei-KIST Convergence Research Institute, Seoul, 02792, Republic of Korea
| | - Jong-Ho Lee
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, 02792, Republic of Korea
| | - Yongseok Jun
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, 02841, Republic of Korea
| | - Ji-Won Son
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, 02841, Republic of Korea
| | - Sungeun Yang
- Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, 02792, Republic of Korea
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11
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Lu QH, Lu J, Li XJ. Structural evolution and electronic properties of neutral and anionic TiASi l (A = Sc, Ti; l ≤ 12): relatively stable TiASi 4 as a structural unit. Phys Chem Chem Phys 2023; 25:529-539. [DOI: 10.1039/d2cp04925b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Molecular orbitals (MO) and the HOMO–LUMO energy gaps (HLgs) of neutral TiASi4 clusters (A = Sc, Ti).
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Affiliation(s)
- Qing-Hua Lu
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
- Inner Mongolia Key Laboratory for Biomass-Energy Conversion, Baotou 014010, P. R. China
| | - Jun Lu
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
- Inner Mongolia Key Laboratory for Biomass-Energy Conversion, Baotou 014010, P. R. China
| | - Xiao-Jun Li
- School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, Shaanxi, P. R. China
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12
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Sugiyama H, Nakao T, Miyazaki M, Abe H, Niwa Y, Kitano M, Hosono H. Low-Temperature Methanol Synthesis by a Cu-Loaded LaH 2+x Electride. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hironobu Sugiyama
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Takuya Nakao
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masayoshi Miyazaki
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Hitoshi Abe
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Yasuhiro Niwa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Wpi-MANA, National Institute for Materials Science, Namiki, Tsukuba, Ibaraki 305-0044, Japan
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13
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Saha R, Das P, Chattaraj PK. Molecular Electrides: An In Silico Perspective. Chemphyschem 2022; 23:e202200329. [PMID: 35894262 DOI: 10.1002/cphc.202200329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/27/2022] [Indexed: 11/10/2022]
Abstract
Electrides are defined as the ionic compounds where the electron(s) serves as an anion. These electron(s) is (are) not bound to any atoms, bonds, or molecules rather than they are localized into the space, crystal voids, or interlayer between two molecular slabs. There are three major categories of electrides, known as organic electriades, inorganic electrides, and molecular electrides. The computational techniques have proven as a great tool to provide emphasis on the electride materials. In this review, we have focused on the computational methodologies and criteria that help to characterize molecular electrides. A detailed account of the computational methods and basis sets applicable for molecular electrides have been discussed along with their limitation(s) in this field. The main criterion for the identification of the electrides has also been discussed thoroughly with proper examples. The molecular electrides presented here have been justified with all the required criteria that support and proved their electride characteristics. We have also presented a few systems which have similar properties but are not considered as molecular electrides. Moreover, the applicability of the electrides in catalytic processes has also been presented.
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Affiliation(s)
- Ranajit Saha
- Hokkaido University, Sapporo, Japan, Institute for Chemical Reaction Design & Discovery (ICReDD), JAPAN
| | - Prasenjit Das
- Indian Institute of Technology Kharagpur, Chemistry, INDIA
| | - Pratim Kumar Chattaraj
- Indian Institute of Technology, Kharagpur, Chemistry, Indian Institute of Technology Kharagpur 721302, 721302, Kharagpur, INDIA
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14
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Gong Y, Li H, Wu J, Song X, Yang X, Bao X, Han X, Kitano M, Wang J, Hosono H. Unique Catalytic Mechanism for Ru-Loaded Ternary Intermetallic Electrides for Ammonia Synthesis. J Am Chem Soc 2022; 144:8683-8692. [PMID: 35507518 DOI: 10.1021/jacs.2c01899] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Intermetallic electrides have recently shown their priority as catalyst components in ammonia synthesis and CO2 activation. However, their function mechanism has been elusive since its inception, which hinders the further development of such catalysts. In this work, ternary intermetallic electrides La-TM-Si (TM = Co, Fe, and Mn) were synthesized as hosts of ruthenium (Ru) particles for ammonia synthesis catalysis. Although they have the same crystal structure and possess low work functions commonly, the promotion effects on Ru particles rather differ from each other. The catalytic activity follows the sequence of Ru/LaCoSi > Ru/LaFeSi > Ru/LaMnSi. Furthermore, Ru/LaCoSi exhibits much better catalytic durability than the other two. A combination of experiments and first-principles calculations shows that apparent N2 activation energy on each catalyst is much lower than that over conventional Ru-based catalysts, which suggests that N2 dissociation can be conspicuously promoted by the concerted actions of the specific electronic structure and atomic configuration of intermetallic electride-supported catalysts. The NHx formations proceeded on La are energetically favored, which makes it possible to bypass the scaling relations based on only Ru as the active site. The rate-determining step of Ru/La-TM-Si was identified to be NH2 formation. The transition metal (TM) in La-TM-Si electrides has a significant influence on the metal-support interaction of Ru and La-TM-Si. These findings provide a guide for the development of new and effective catalyst hosts for ammonia synthesis and other hydrogenation reactions.
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Affiliation(s)
- Yutong Gong
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Hongchen Li
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Jiazhen Wu
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.,Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P.R. China
| | - Xingyi Song
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Xueqing Yang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Xiaobing Bao
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Xiao Han
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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15
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Fang H, Liu D, Luo Y, Zhou Y, Liang S, Wang X, Lin B, Jiang L. Challenges and Opportunities of Ru-Based Catalysts toward the Synthesis and Utilization of Ammonia. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00090] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Huihuang Fang
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Dan Liu
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Yu Luo
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Yanliang Zhou
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Shijing Liang
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Xiuyun Wang
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Bingyu Lin
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
| | - Lilong Jiang
- National Engineering Research Center for Chemical Fertilizer Catalyst (NERC−CFC), School of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, P.R. China
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16
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Facile MOF-derived one-pot synthetic approach toward Ru single atoms, nanoclusters, and nanoparticles dispersed on CeO2 supports for enhanced ammonia synthesis. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Ravi M, Makepeace JW. Facilitating green ammonia manufacture under milder conditions: what do heterogeneous catalyst formulations have to offer? Chem Sci 2022; 13:890-908. [PMID: 35211256 PMCID: PMC8790769 DOI: 10.1039/d1sc04734e] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/28/2021] [Indexed: 12/25/2022] Open
Abstract
Ammonia production is one of the largest industrial processes, and is currently responsible for over 1.5% of global greenhouse gas emissions. Decarbonising this process, yielding 'green ammonia', is critical not only for sustainable fertilizer production, but also to unlocking ammonia's potential as a zero-carbon fuel and hydrogen store. In this perspective, we critically assess the role of cutting-edge heterogeneous catalysts to facilitate milder ammonia synthesis conditions that will help unlock cheaper, smaller-scale, renewables-coupled ammonia production. The highly-optimised performance of catalysts under the high temperatures and pressures of the Haber-Bosch process stands in contrast to the largely mediocre activity levels reported at lower temperatures and pressures. We identify the recent advances in catalyst design that help overcome the sluggish kinetics of nitrogen activation under these conditions and undertake a categorized analysis of improved activity achieved in a range of heterogeneous catalysts. Building on these observations, we develop a 'catalyst efficiency' analysis which helps uncover the success of a holistic approach - one that addresses the issues of nitrogen activation, hydrogenation of adsorbed nitrogen species, and engineering of materials to maximize the utilization of active sites - for achieving the elusive combination of high-activity, low-temperature formulations. Furthermore, we present a discussion on the industrial considerations to catalyst development, emphasising the importance of catalyst lifetime in addition to catalyst activity. This assessment is critical to ensuring that high productivities can translate into real advances in commercial ammonia synthesis.
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Affiliation(s)
- Manoj Ravi
- School of Chemistry, University of Birmingham Birmingham B15 2TT UK
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18
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Li L, Zhang T, Zhou Y, Wang X, Au CT, Jiang L. Review on catalytic roles of rare earth elements in ammonia synthesis: Development and perspective. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.06.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Wang Z, Cheng M, Zhang X, Guo Z, Zhou Z, Zhang M. Synthesis of Metal Silicides Using Polyhedral Oligomeric Silsesquioxane as Silicon Source for Semi-Hydrogenation of phenylacetylene. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01586a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal silicides as a new typical of intermetallic compound has great potential in catalytic reaction. Here, an efficient route for synthesizing metal silicides (such as Pd2Si, RuxSi, PtxSi and Ni2Si)...
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20
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Chang F, Gao W, Guo J, Chen P. Emerging Materials and Methods toward Ammonia-Based Energy Storage and Conversion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005721. [PMID: 33834538 DOI: 10.1002/adma.202005721] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Efficient storage and conversion of renewable energies is of critical importance to the sustainable growth of human society. With its distinguishing features of high hydrogen content, high energy density, facile storage/transportation, and zero-carbon emission, ammonia has been recently considered as a promising energy carrier for long-term and large-scale energy storage. Under this scenario, the synthesis, storage, and utilization of ammonia are key components for the implementation of ammonia-mediated energy system. Being different from fossil fuels, renewable energies normally have intermittent and variable nature, and thus pose demands on the improvement of existing technologies and simultaneously the development of alternative methods and materials for ammonia synthesis and storage. The energy release from ammonia in an efficient manner, on the other hand, is vital to achieve a sustainable energy supply and complete the nitrogen circle. Herein, recent advances in the thermal-, electro-, plasma-, and photocatalytic ammonia synthesis, ammonia storage or separation, ammonia thermal/electrochemical decomposition and conversion are summarized with the emphasis on the latest developments of new methods and materials (catalysts, electrodes, and sorbents) for these processes. The challenges and potential solutions are discussed.
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Affiliation(s)
- Fei Chang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Wenbo Gao
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jianping Guo
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- Energy College, University of Chinese Academy of Sciences, Beijing, 100049, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Dalian, 116023, China
| | - Ping Chen
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- Energy College, University of Chinese Academy of Sciences, Beijing, 100049, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Dalian, 116023, China
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21
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Lu J, Lu QH, Li XJ. Quantum chemistry calculations of the growth patterns, simulated photoelectron spectra, and electronic properties of LaASi l (A = Sc, Y, La; l ≤ 10) compounds and their anions. Phys Chem Chem Phys 2021; 23:25679-25688. [PMID: 34755155 DOI: 10.1039/d1cp03767f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The growth patterns, simulated photoelectron spectra, and electronic properties of LaASil (A = Sc, Y, and La; l ≤ 10) compounds and their anions were studied via quantum chemistry calculations using the Perdew-Burke-Ernzerhof (PBE) method and unprejudiced structural searching software ABCluster. The results revealed that the growth patterns of the most stable structures of neutral and anionic LaASil showed an adsorptive mode. The lowest-energy structures (LESs) of the LaASil (l ≤ 7) clusters were similar, except for those of anionic LaYSi4- and LaYSi5- and neutral LaScSi7. Additionally, we investigated and calculated the photoelectron spectra, vertical detachment energies, adiabatic electron affinities, relative stability, charge transfer, magnetic moment, and chemical bond analysis of the LaASil ground-state structures. The La2Sil clusters exhibited higher stability than the LaYSil and LaScSil systems owing to their higher dissociation energies (DEs). The DEs of the LESs in the LaASi3 molecule are higher than those of other clusters. Thus, the LaASi3 cluster shows potential as a building framework for Si-based cluster materials with good stability. The natural population analysis data and chemical bond analysis results showed that the spd hybridization of the orbitals of the metal atoms in the LaASil system occurred. Except for the LaScSi9 and LaScSi10 clusters, the neutral LaASil compounds transform into the corresponding anions when an extra electron is accepted by the Si clusters.
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Affiliation(s)
- Jun Lu
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China.
| | - Qing-Hua Lu
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China.
| | - Xiao-Jun Li
- School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, Shaanxi, P. R. China
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22
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Sun Y, Chen Y, Zhang X, He Y, Qiu Z, Zheng W, Wang F, Jiao H, Yang Y, Li Y, Wen X. The Facile Dissociation of Carbon–Oxygen Bonds in CO
2
and CO on the Surface of LaCoSiH
x
Intermetallic Compound. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yongfang Sun
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 P. R. China
| | - Yunlei Chen
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 P. R. China
| | - Xiangyu Zhang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 P. R. China
| | - Yurong He
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Information S & T University Beijing 101400 P. R. China
| | - Zhongxian Qiu
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- College of Chemistry and Chemical Engineering Hunan Normal University Changsha Hunan 410081 China
| | - Wentao Zheng
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
| | - Fei Wang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Yong Yang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
| | - Yongwang Li
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China
- National Energy Center for Coal to Liquids Synfuels China Co. Ltd. Huairou District Beijing 101400 P. R. China
- Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Information S & T University Beijing 101400 P. R. China
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23
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Sun Y, Chen Y, Zhang X, He Y, Qiu Z, Zheng W, Wang F, Jiao H, Yang Y, Li Y, Wen X. The Facile Dissociation of Carbon-Oxygen bonds in CO 2 and CO on the Surface of LaCoSiH x Intermetallic Compound. Angew Chem Int Ed Engl 2021; 60:25538-25545. [PMID: 34519395 DOI: 10.1002/anie.202111747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Indexed: 11/09/2022]
Abstract
In catalysis science, the electronic structure of the active site determines the structure-activity relationship of the catalyst to a large extent. Therefore, modulating the electronic structure has become a main route for the rational design of metal-based catalyst materials. In this work, we prepared a LaCoSiHx material that has more electronegativity and a lower workfunction than traditional supported Co-based catalysts. Using CO2 methanation as a model catalytic reaction, the facile dissociation of CO2 and CO (a key reaction intermediate) on the surface of the LaCoSiHx catalyst is observed by various experimental methods (e.g., in situ Raman and FTIR) at room temperature. Moreover, theoretical calculation results further show that LaCoSiHx has a much stronger capacity for carbon-oxygen bond activation than the Co surface. The intrinsic mechanism is attributed to the marked electron transfer from catalysts into the antibonding orbital of CO2 and CO.
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Affiliation(s)
- Yongfang Sun
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P. R. China
| | - Yunlei Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P. R. China
| | - Xiangyu Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P. R. China
| | - Yurong He
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Information S & T University, Beijing, 101400, P. R. China
| | - Zhongxian Qiu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan, 410081, China
| | - Wentao Zheng
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
| | - Fei Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein Strasse 29a, 18059, Rostock, Germany
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China
| | - Yongwang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. Huairou District, Beijing, 101400, P. R. China.,Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Information S & T University, Beijing, 101400, P. R. China
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24
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Hisai Y, Ma Q, Qureishy T, Watanabe T, Higo T, Norby T, Sekine Y. Enhanced activity of catalysts on substrates with surface protonic current in an electrical field - a review. Chem Commun (Camb) 2021; 57:5737-5749. [PMID: 34027532 DOI: 10.1039/d1cc01551f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It has over the last few years been reported that the application of a DC electric field and resulting current over a bed of certain catalyst-support systems enhances catalytic activity for several reactions involving hydrogen-containing reactants, and the effect has been attributed to surface protonic conductivity on the porous ceramic support (typically ZrO2, CeO2, SrZrO3). Models for the nature of the interaction between the protonic current, the catalyst particle (typically Ru, Ni, Co, Fe), and adsorbed reactants such as NH3 and CH4 have developed as experimental evidence has emerged. Here, we summarize the electrical enhancement and how it enhances yield and lowers reaction temperatures of industrially important chemical processes. We also review the nature of the relevant catalysts, support materials, as well as essentials and recent progress in surface protonics. It is easily suspected that the effect is merely an increase in local vs. nominal set temperature due to the ohmic heating of the electrical field and current. We address this and add data from recent studies of ours that indicate that the heating effect is minor, and that the novel catalytic effect of a surface protonic current must have additional causes.
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Affiliation(s)
- Yudai Hisai
- Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
| | - Quanbao Ma
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, FERMiO, Gaustadalléen 21, NO-0349 Oslo, Norway.
| | - Thomas Qureishy
- Department of Chemistry, Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, P.O. Box 1033 Blindern, NO-0315 Oslo, Norway
| | | | - Takuma Higo
- Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
| | - Truls Norby
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, FERMiO, Gaustadalléen 21, NO-0349 Oslo, Norway.
| | - Yasushi Sekine
- Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
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25
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Yiliguma, Park SW, Li J, Sasase M, Kitano M, Hosono H. C 2 Vacancy-Mediated N 2 Activation over Ni-Loaded Rare-Earth Dicarbides for Ammonia Synthesis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01646] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yiliguma
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Sang-Won Park
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Jiang Li
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masato Sasase
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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26
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Li K, Gong Y, Wang J, Hosono H. Electron-Deficient-Type Electride Ca 5Pb 3: Extension of Electride Chemical Space. J Am Chem Soc 2021; 143:8821-8828. [PMID: 34096289 DOI: 10.1021/jacs.1c03278] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrides have been identified so far by two major routes: one is conversion of elemental metals and stoichiometric compounds by high pressure; the other is to search for electron-rich compounds, and this approach is more general. In contrast, few electron-deficient structures in existing databases have been revealed as potential electride candidates. In this work, we found an electron-deficient compound Ca5Pb3 could be transformed into electrides upon applying external pressure or strain along the c-axis, which induces the electron immigration from Pb to interstitial sites. Furthermore, the electron doping via Hf substitution of Ca atoms for Ca5Pb3 was found to be capable of tuning the interstitial electron density under ambient pressure, resulting in a new stable ternary electride Ca3Hf2Pb3, Hf-substituted Ca5Pb3. The electron-deficient electride discovered here is of novel type and can largely expand the research scope of electrides. Considering a recently reported neutral electride Na3N and the present finding, it is now clarified that electrides can be identified irrespective of stoichiometry (electron-rich, -neutral, or -poor) for compounds.
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Affiliation(s)
- Kun Li
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Yutong Gong
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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27
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Sitkiewicz SP, Ramos-Cordoba E, Luis JM, Matito E. How Many Electrons Does a Molecular Electride Hold? J Phys Chem A 2021; 125:4819-4835. [PMID: 34038110 DOI: 10.1021/acs.jpca.1c02760] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrides are very peculiar ionic compounds where electrons occupy the anionic positions. In a crystal lattice, these isolated electrons often form channels or surfaces, furnishing electrides with many traits with promising technological applications. Despite their huge potential, thus far, only a few stable electrides have been produced because of the intricate synthesis they entail. Due to the difficulty in assessing the presence of isolated electrons, the characterization of electrides also poses some serious challenges. In fact, their properties are expected to depend on the arrangement of these electrons in the molecule. Among the criteria that we can use to characterize electrides, the presence of a non-nuclear attractor (NNA) of the electron density is both the rarest and the most salient feature. Therefore, a correct description of the NNA is crucial to determine the properties of electrides. In this paper, we analyze the NNA and the surrounding region of nine molecular electrides to determine the number of isolated electrons held in the electride. We have seen that the correct description of a molecular electride hinges on the electronic structure method employed for the analyses. In particular, one should employ a basis set with sufficient flexibility to describe the region close to the NNA and a density functional approximation that does not suffer from large delocalization errors. Finally, we have classified these nine molecular electrides according to the most likely number of electrons that we can find in the NNA. We believe this classification highlights the strength of the electride character and will prove useful in designing new electrides.
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Affiliation(s)
- Sebastian P Sitkiewicz
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain.,Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Eloy Ramos-Cordoba
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain.,Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, 17003 Girona, Catalonia, Spain
| | - Eduard Matito
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain.,Ikerbasque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Euskadi, Spain
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28
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Zhang S, Saji SE, Yin Z, Zhang H, Du Y, Yan CH. Rare-Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005988. [PMID: 33709501 DOI: 10.1002/adma.202005988] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/25/2020] [Indexed: 06/12/2023]
Abstract
To improve the performance of metallic catalysts, alloying provides an efficient methodology to design state-of-the-art materials. As emerging functional materials, rare-earth metal compounds can integrate the unique orbital structure and catalytic behavior of rare earth elements into metallic materials. Such rare-earth containing alloy catalysts proffer an opportunity to tailor electronic properties, tune charged carrier transport, and synergize surface reactivity, which are expected to significantly improve the performance and stability of catalysis. Despite its significance, there are only few reviews on rare earth containing alloys or related topics. This review summarizes the composition, synthesis, and applications of rare earth containing alloys in the field of catalysis. Subsequent to comprehensively summarizing and constructively discussing the existing work, the challenges and possibilities of future research on rare-earth metal compound materials are evaluated.
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Affiliation(s)
- Shuai Zhang
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China
| | - Sandra Elizabeth Saji
- Research School of Chemistry, Australian National University, Canberra, 2601, Australia
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, 2601, Australia
| | - Hongbo Zhang
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China
| | - Yaping Du
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China
| | - Chun-Hua Yan
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
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29
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Affiliation(s)
- Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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30
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Humphreys J, Lan R, Tao S. Development and Recent Progress on Ammonia Synthesis Catalysts for Haber–Bosch Process. ADVANCED ENERGY AND SUSTAINABILITY RESEARCH 2020. [DOI: 10.1002/aesr.202000043] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- John Humphreys
- School of Engineering University of Warwick Coventry CV4 7AL UK
| | - Rong Lan
- School of Engineering University of Warwick Coventry CV4 7AL UK
| | - Shanwen Tao
- School of Engineering University of Warwick Coventry CV4 7AL UK
- Department of Chemical Engineering Monash University Clayton Victoria 3800 Australia
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31
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Marakatti VS, Gaigneaux EM. Recent Advances in Heterogeneous Catalysis for Ammonia Synthesis. ChemCatChem 2020. [DOI: 10.1002/cctc.202001141] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Vijaykumar S. Marakatti
- Institute of Condensed Matter and Nanosciences (IMCN) Molecular chemistry, Solids and caTalysis(MOST) Université catholique de Louvain (UCLouvain) Louvain-la-Neuve BE-1348 Belgium
| | - Eric M. Gaigneaux
- Institute of Condensed Matter and Nanosciences (IMCN) Molecular chemistry, Solids and caTalysis(MOST) Université catholique de Louvain (UCLouvain) Louvain-la-Neuve BE-1348 Belgium
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32
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Lukoyanov AV, Gramateeva LN, Knyazev YV, Kuz’min YI, Gupta S, Suresh KG. Effect of Electronic Correlations on the Electronic Structure, Magnetic and Optical Properties of the Ternary RCuGe Compounds with R = Tb, Dy, Ho, Er. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13163536. [PMID: 32796558 PMCID: PMC7475831 DOI: 10.3390/ma13163536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 06/11/2023]
Abstract
In this study, the ab initio and experimental results for RCuGe ternary intermetallics were reported for R = Tb, Dy, Ho, Er. Our theoretical calculations of the electronic structure, employing local spin density approximation accounting for electron-electron correlations in the 4f shell of Tb, Dy, Ho, Er ions were carried in DFT+U method. The optical properties of the RCuGe ternary compounds were studied at a broad range of wavelengths. The spectral and electronic characteristics were obtained. The theoretical electron densities of states were taken to interpret the experimental energy dependencies of the experimental optical conductivity in the interband light-absorption region. From the band calculations, the 4f shell of the rare-earth ions was shown to provide the major contribution to the electronic structure, magnetic and optical properties of the RCuGe intermetallics. The accounting for electron-electron correlations in Tb, Dy, Ho, Er resulted in a good agreement between the calculated and experimental magnetic and optical characteristics.
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Affiliation(s)
- Alexey V. Lukoyanov
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (L.N.G.); (Y.V.K.); (Y.I.K.)
- Ural Federal University named after the first President of Russia B.N. Yeltsin, 620002 Ekaterinburg, Russia
| | - Lubov N. Gramateeva
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (L.N.G.); (Y.V.K.); (Y.I.K.)
| | - Yury V. Knyazev
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (L.N.G.); (Y.V.K.); (Y.I.K.)
| | - Yury I. Kuz’min
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (L.N.G.); (Y.V.K.); (Y.I.K.)
| | - Sachin Gupta
- Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan;
- Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India;
| | - K. G. Suresh
- Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India;
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33
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The important role of N2H formation energy for low-temperature ammonia synthesis in an electric field. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.10.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Kang SH, Bang J, Chung K, Nandadasa CN, Han G, Lee S, Lee KH, Lee K, Ma Y, Oh SH, Kim SG, Kim YM, Kim SW. Water- and acid-stable self-passivated dihafnium sulfide electride and its persistent electrocatalytic reaction. SCIENCE ADVANCES 2020; 6:eaba7416. [PMID: 32548272 PMCID: PMC7274801 DOI: 10.1126/sciadv.aba7416] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
Electrides have emerged as promising materials with exotic properties, such as extraordinary electron-donating ability. However, the inevitable instability of electrides, which is caused by inherent excess electrons, has hampered their widespread applications. We report that a self-passivated dihafnium sulfide electride ([Hf2S]2+∙2e-) by double amorphous layers exhibits a strong oxidation resistance in water and acid solutions, enabling a persistent electrocatalytic hydrogen evolution reaction. The naturally formed amorphous Hf2S layer on the cleaved [Hf2S]2+∙2e- surface reacts with oxygen to form an outermost amorphous HfO2 layer with ~10-nm thickness, passivating the [Hf2S]2+∙2e- electride. The excess electrons in the [Hf2S]2+∙2e- electride are transferred through the thin HfO2 passivation layer to water molecules under applied electric fields, demonstrating the first electrocatalytic reaction with excellent long-term sustainability and no degradation in performance. This self-passivation mechanism in reactive conditions can advance the development of stable electrides for energy-efficient applications.
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Affiliation(s)
- Se Hwang Kang
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon 16419, Republic of Korea
| | - Joonho Bang
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyungwha Chung
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chandani N. Nandadasa
- Department of Physics & Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi State, MS 39762, USA
| | - Gyeongtak Han
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Subin Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon 16419, Republic of Korea
| | - Kyu Hyoung Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Kimoon Lee
- Department of Physics, Kunsan National University, Kunsan 54150, Republic of Korea
| | - Yanming Ma
- State Key Laboratory of Superhard Materials & Innovation Centre of Computational Physics Method and Software, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Sang Ho Oh
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seong-Gon Kim
- Department of Physics & Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi State, MS 39762, USA
| | - Young-Min Kim
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon 16419, Republic of Korea
| | - Sung Wng Kim
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon 16419, Republic of Korea
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35
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Qi M, Tang C, Zhou Z, Ma F, Mo Y. Electride‐Sponsored Radical‐Controlled CO
2
Reduction to Organic Acids: A Computational Design. Chemistry 2020; 26:6234-6239. [DOI: 10.1002/chem.202000092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/16/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Mengyu Qi
- School of Chemistry and Materials Science Huaibei Normal University Huaibei 235000 P.R. China
| | - Chuankai Tang
- School of Chemistry and Materials Science Huaibei Normal University Huaibei 235000 P.R. China
| | - Zhongjun Zhou
- Institute of Theoretical Chemistry Jilin University Changchun 130023 P.R. China
| | - Fang Ma
- School of Chemistry and Materials Science Huaibei Normal University Huaibei 235000 P.R. China
| | - Yirong Mo
- Department of Chemistry Western Michigan University Kalamazoo MI 49008 USA
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36
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Folkers LC, Mitchell Warden HE, Fredrickson DC, Lidin S. Entropy-Driven Incommensurability: Chemical Pressure-Guided Polymorphism in PdBi and the Origins of Lock-In Phenomena in Modulated Systems. Inorg Chem 2020; 59:4936-4949. [PMID: 32202768 DOI: 10.1021/acs.inorgchem.0c00197] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Incommensurate order, in which two or more mismatched periodic patterns combine to make a long-range ordered yet aperiodic structure, is emerging as a general phenomenon impacting the crystal structures of compounds ranging from alloys and nominally simple salts to organic molecules and proteins. The origins of incommensurability in these systems are often unclear, but it is commonly associated with relatively weak interactions that become apparent only at low temperatures. In this article, we elucidate an incommensurate modulation in the intermetallic compound PdBi that arises from a different mechanism: the controlled increase of entropy at higher temperatures. Following the synthesis of PdBi, we structurally characterize two low-temperature polymorphs of the TlI-type structure with single crystal synchrotron X-ray diffraction. At room temperature, we find a simple commensurate superstructure of the TlI-type structure (comm-PdBi), in which the Pd sublattice distorts to form a 2D pattern of short and long Pd-Pd contacts. Upon heating, the structure converts to an incommensurate variant (incomm-PdBi) corresponding to the insertion of thin slabs of the original TlI type into the superstructure. Theoretical bonding analysis suggests that comm-PdBi is driven by the formation of isolobal Pd-Pd bonds along shortened contacts in the distorted Pd network, which is qualitatively in accord with the 18-n rule but partially frustrated by the population of competing Bi-Bi bonding states. The emergence of incomm-PdBi upon heating is rationalized with the DFT-Cemical Pressure (CP) method: the insertion of TlI-type slabs result in regions of higher vibrational freedom that are entropically favored at higher temperatures. High-temperature incommensurability may be encountered in other materials when bond formation is weakened by competing electronic states, and there is a path for accommodating defects in the CP scheme.
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Affiliation(s)
- Laura C Folkers
- Centre for Analysis and Synthesis, Lunds Universitet, Naturvetarvägen 14, 222-61 Lund, Sweden
| | - Hillary E Mitchell Warden
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Daniel C Fredrickson
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Sven Lidin
- Centre for Analysis and Synthesis, Lunds Universitet, Naturvetarvägen 14, 222-61 Lund, Sweden
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37
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Kammert J, Moon J, Cheng Y, Daemen L, Irle S, Fung V, Liu J, Page K, Ma X, Phaneuf V, Tong J, Ramirez-Cuesta AJ, Wu Z. Nature of Reactive Hydrogen for Ammonia Synthesis over a Ru/C12A7 Electride Catalyst. J Am Chem Soc 2020; 142:7655-7667. [DOI: 10.1021/jacs.0c02345] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- James Kammert
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jisue Moon
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yongqiang Cheng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke Daemen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Stephan Irle
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Victor Fung
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jue Liu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Katharine Page
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiaohan Ma
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Vincent Phaneuf
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Jianhua Tong
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Anibal J. Ramirez-Cuesta
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Zili Wu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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38
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Kulichenko M, Fedik N, Steglenko D, Minyaev RM, Minkin VI, Boldyrev AI. Periodic F-defects on the MgO surface as potential single-defect catalysts with non-linear optical properties. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110680] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Daniels CL, Knobeloch M, Yox P, Adamson MAS, Chen Y, Dorn RW, Wu H, Zhou G, Fan H, Rossini AJ, Vela J. Intermetallic Nanocatalysts from Heterobimetallic Group 10–14 Pyridine-2-thiolate Precursors. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00803] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Carena L. Daniels
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Megan Knobeloch
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Philip Yox
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | | | - Yunhua Chen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Rick W. Dorn
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, Ames, Iowa 50011, United States
| | - Hao Wu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang, People’s Republic of China
| | - Guoquan Zhou
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang, People’s Republic of China
| | - Huajun Fan
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, People’s Republic of China
| | - Aaron J. Rossini
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, Ames, Iowa 50011, United States
| | - Javier Vela
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, Ames, Iowa 50011, United States
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40
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Imamura K, Miyahara SI, Kawano Y, Sato K, Nakasaka Y, Nagaoka K. Kinetics of ammonia synthesis over Ru/Pr2O3. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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Mahon T, Gaudin E, Villesuzanne A, Chevalier B, Tencé S. Effect of Carbon Insertion on the Structural and Magnetic Properties of NdScSi. Inorg Chem 2019; 58:15255-15268. [PMID: 31674174 DOI: 10.1021/acs.inorgchem.9b02260] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The investigation of layered intermetallic compounds containing light elements like hydrogen has great potential for superconductivity. We studied the insertion of carbon atoms in CeScSi-type intermetallics (an ordered variant of the La2Sb structure type), and here, we report the new carbide NdScSiC0.5. Carbon insertion keeps the pristine compound's space group, I4/mmm, but causes an anisotropic expansion of the unit cell with an increase in the a parameter and a decrease of the c parameter. X-ray and neutron diffraction measurements indicate the existence of a NdScSiCx solid solution (0.2 < x ≤ 0.5) with carbon atoms occupying only the Sc4Nd2 octahedral sites while leaving the Nd4 tetrahedral sites vacant. Magnetization measurements unveil a linear reduction of the ferromagnetic ordering temperature from TC = ∼171 K to ∼50 K with increasing carbon content. The ferromagnetic structures of the pristine NdScSi and the filled NdScSiC0.5 have been determined from neutron diffraction measurements. Finally, we discuss the effect of carbon versus hydrogen insertion on electronic and magnetic properties based on density functional theory calculations. Although the unpaired spin density channels between Nd and Sc atoms (responsible of the high Curie temperature in NdScSi) are reduced upon carbon insertion, the strong Nd-C interaction, linked to a reduced c lattice parameter in NdScSiC0.5, ensures a strong magnetic coupling between the Nd double layer along the c axis and the ferromagnetic order is preserved.
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Affiliation(s)
- Tadhg Mahon
- CNRS, Université de Bordeaux, Bordeaux INP, ICMCB , UMR 5026, F-33600 Pessac , France
| | - Etienne Gaudin
- CNRS, Université de Bordeaux, Bordeaux INP, ICMCB , UMR 5026, F-33600 Pessac , France
| | - Antoine Villesuzanne
- CNRS, Université de Bordeaux, Bordeaux INP, ICMCB , UMR 5026, F-33600 Pessac , France
| | - Bernard Chevalier
- CNRS, Université de Bordeaux, Bordeaux INP, ICMCB , UMR 5026, F-33600 Pessac , France
| | - Sophie Tencé
- CNRS, Université de Bordeaux, Bordeaux INP, ICMCB , UMR 5026, F-33600 Pessac , France
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42
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Park SW, Hosono H, Fredrickson DC. Cation Clustering in Intermetallics: The Modular Bonding Schemes of CaCu and Ca 2Cu. Inorg Chem 2019; 58:10313-10322. [PMID: 31339698 DOI: 10.1021/acs.inorgchem.9b01486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electropositive metals such as the alkaline earths or lanthanides are generally assumed to act largely as spectator cations in solid state compounds. In polar intermetallic phases, atoms of such elements are indeed often placed at the peripheries of anions or polyanionic fragments. However, they also show a pronounced tendency to cluster with each other in these peripheral regions in a manner suggestive of multicenter bonding. In this Article, we theoretically investigate the bonding schemes that underlie these cationic cluster arrangements, focusing on CaCu (whose two polymorphs are based on the intergrowth of the FeB- and CrB-types) and Ca2Cu (a Ca-intercalated derivative of CaCu). The structures of these phases are based on Cu zigzag chains embedded in matrices of Ca atoms arranged into increasingly well-developed fragments of closest-packed arrangements. Using reversed approximation Molecular Orbital (raMO) analysis, the Cu chains of both structures are revealed to be connected via nearly fully occupied Cu-Cu isolobal σ-bonds, such that the Cu atoms control 11.67 of the 13 and 15 electrons/formula unit of CaCu and Ca2Cu, respectively. Most of the remaining electrons are drawn to multicenter bonding functions in the Ca sublattices despite the availability of additional Cu 4p orbitals, indicating that the electronegativity difference between Ca and Cu is insufficient to achieve formal Cu oxidation states far beyond -1. The metallic nature of the Ca-based bonding subsystem is reflected in the raMO analysis by a plurality of resonance structures that can be generated from the occupied crystal orbitals. Across these bonding schemes, a separation of the electronic structure into largely self-contained Ca-Ca and Ca-Cu states is a consistent theme. This modularity in the bonding can be correlated to the ease with which this and related systems rearrange FeB- and CrB-type features, which may provide clues to identifying other intermetallic families with similar degrees of structural versatility.
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Affiliation(s)
- Sang-Won Park
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan.,Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Hideo Hosono
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
| | - Daniel C Fredrickson
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan.,Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
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43
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Li J, Wu J, Wang H, Lu Y, Ye T, Sasase M, Wu X, Kitano M, Inoshita T, Hosono H. Acid-durable electride with layered ruthenium for ammonia synthesis: boosting the activity via selective etching. Chem Sci 2019; 10:5712-5718. [PMID: 31293756 PMCID: PMC6563781 DOI: 10.1039/c9sc01539f] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 05/03/2019] [Indexed: 11/22/2022] Open
Abstract
We reported LnRuSi as a B5-site-free Ru catalyst for ammonia synthesis, and its activity enhanced 2–4-fold by selective etching with EDTA-2Na.
Ruthenium (Ru) loaded catalysts are of significant interest for ammonia synthesis under mild reaction conditions. The B5 sites have been reported as the active sites for ammonia formation, i.e., Ru with other coordinations were inactive, which has limited the utilization efficiency of Ru metal. The implantation of Ru into intermetallic compounds is considered to be a promising approach to tune the catalytic activity and utilization efficiency of Ru. Here we report an acid-durable electride, LnRuSi (Ln = La, Ce, Pr and Nd), as a B5-site-free Ru catalyst. The active Ru plane with a negative charge is selectively exposed by chemical etching using disodium dihydrogen ethylenediaminetetraacetate (EDTA-2Na) acid, which leads to 2–4-fold enhancement in the ammonia formation rate compared with that of the original catalyst. The turnover frequency (TOF) of LnRuSi is estimated to be approximately 0.06 s–1, which is 600 times higher than that of pure Ru powder. Density functional theory (DFT) calculations revealed that the dissociation of N2 occurs easily on the exposed Ru plane of LaRuSi. This systematic study provides firm evidence that layered Ru with a negative charge in LnRuSi is a new type of active site that differs significantly from B5 sites.
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Affiliation(s)
- Jiang Li
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Jiazhen Wu
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Haiyun Wang
- Hefei National Laboratory for Physical Sciences at the Microscale , Synergetic Innovation of Quantum Information & Quantum Technology , School of Chemistry and Materials Science , CAS Key Laboratory of Materials for Energy Conversion , CAS Center for Excellence in Nanoscience , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Yangfan Lu
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Tiannan Ye
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Masato Sasase
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale , Synergetic Innovation of Quantum Information & Quantum Technology , School of Chemistry and Materials Science , CAS Key Laboratory of Materials for Energy Conversion , CAS Center for Excellence in Nanoscience , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Masaaki Kitano
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Takeshi Inoshita
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
| | - Hideo Hosono
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku , Yokohama 226-8503 , Japan . ;
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44
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Kulichenko M, Fedik N, Bozhenko KV, Boldyrev AI. Inorganic Molecular Electride Mg
4
O
3
: Structure, Bonding, and Nonlinear Optical Properties. Chemistry 2019; 25:5311-5315. [DOI: 10.1002/chem.201806372] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Maksim Kulichenko
- Department of Chemistry and BiochemistryUtah State University Old Main Hill 300 Logan Utah 84322 USA
| | - Nikita Fedik
- Department of Chemistry and BiochemistryUtah State University Old Main Hill 300 Logan Utah 84322 USA
| | - Konstatin V. Bozhenko
- Department of Physical and Colloid ChemistryPeoples' Friendship University of Russia (RUDN University) 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
- Institute of Problems of Chemical PhysicsRussian Academy of Sciences, Chernogolovka 142432 Moscow Region Russia
| | - Alexander I. Boldyrev
- Department of Chemistry and BiochemistryUtah State University Old Main Hill 300 Logan Utah 84322 USA
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45
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Wu J, Lu E, Li J, Lu Y, Kitano M, Fredrickson DC, Inoshita T, Hosono H. Pseudogap Control of Physical and Chemical Properties in CeFeSi-Type Intermetallics. Inorg Chem 2019; 58:2848-2855. [PMID: 30729788 DOI: 10.1021/acs.inorgchem.8b03539] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe the synthesis of the new ternary compound CaRuSi whose chemical and physical properties help draw a clear picture of how electronic structure controls the behavior of an isostructural series of intermetallics. DFT calculations reveal that an electronic pseudogap arises near the Fermi level ( EF), corresponding to 14 valence electrons per RuSi unit. The closed-shell-like character is further investigated by comparisons with the electronic structures of CaCoSi (15 electrons), where the EF lies above the corresponding pseudogap, and its hydride CaCoSiH, where formation of H anions restores the 14-electron count on the metal sublattice, returning the EF to the pseudogap. The chemical origin of the 14-electron pseudogap is interpreted with a reversed approximation Molecular Orbital analysis. Here, the pseudogap is shown to coincide with the filling of Ru 16 electron configurations isolobal to the d8 square planar complexes of coordination chemistry (but where 4 electron pairs are shared covalently between Ru atoms such that only 12 electrons are required), and the occupation of Si lone pairs (2 electrons). Experimentally, the pseudogap is confirmed with heat capacity measurements, which indicate that the 14-electron systems CaRuSi and CaCoSiH each exhibit a smaller electronic density of states at the EF than the 15-electron system CaCoSi. Importantly, the 14-electron pseudogap also significantly affects the chemical properties of the compounds, as evidenced by the difference in the stabilities of CaCoSiH and CaRuSiH observed in hydrogen desorption measurements. These results may support the design of functional materials for superconductivity, hydrogen storage, and catalysis involving hydrogenation.
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Affiliation(s)
- Jiazhen Wu
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
| | - Erdong Lu
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 57306 , United States
| | - Jiang Li
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
| | - Yangfan Lu
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
| | - Daniel C Fredrickson
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan.,Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 57306 , United States
| | - Takeshi Inoshita
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan.,National Institute for Materials Science , Tsukuba , Ibaraki 305-0044 , Japan
| | - Hideo Hosono
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan.,Laboratory for Materials and Structures, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan
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46
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Mizoguchi H, Park SW, Kishida K, Kitano M, Kim J, Sasase M, Honda T, Ikeda K, Otomo T, Hosono H. Zeolitic Intermetallics: LnNiSi (Ln = La–Nd). J Am Chem Soc 2019; 141:3376-3379. [DOI: 10.1021/jacs.8b12784] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroshi Mizoguchi
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Sang-Won Park
- Laboratory for Materials Research, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Kazuhisa Kishida
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masaaki Kitano
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Junghwan Kim
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masato Sasase
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Takashi Honda
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Kazutaka Ikeda
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Toshiya Otomo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- Laboratory for Materials Research, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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47
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Qu J, Zhu S, Zhang W, Zhu Q. Electrides with Dinitrogen Ligands. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5256-5263. [PMID: 30644709 DOI: 10.1021/acsami.8b18676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Electrides are a class of materials which contain excess electrons occupying the cavities in the crystal and playing the role of anions. To achieve electron-rich conditions, it usually requires a positive total formal charge in electride materials. However, the assignment of charges relies on a detailed analysis on chemical bonding. Herein, we present a survey on potential electrides which may be overlooked if no bonding analysis is performed. By applying various structure sampling techniques in conjunction with first-principles calculation, we predicted two compounds Ba2N2:e- and Li2Ca3N6:2e-, both of which are featured by the presence of dinitrogen ligands [N2], to be potential electrides. While Li2Ca3N6:2e- with [N2]2- ions has been synthesized in the past, its electride nature was discovered for the first time based on our high-throughput screening. On the other hand, Ba2N2:e- with [N2]3- ions is a new compound entirely from first-principles structure prediction. The different valence states of dinitrogen ligands identified in these two compounds suggest a novel route to tune the concentration and anisotropic properties of anionic interstitial electrons. Our discovery does not only establish a new class of inorganic electrides but also demonstrates the predictive power of modern crystal structure sampling techniques toward rational material design.
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Affiliation(s)
- Jingyu Qu
- College of Science , China Agricultural University , Beijing 100083 , China
- Department of Physics and Astronomy, High Pressure Science and Engineering Center , University of Nevada, Las Vegas , Las Vegas , Nevada 89154 , United States
| | - Shengcai Zhu
- Department of Physics and Astronomy, High Pressure Science and Engineering Center , University of Nevada, Las Vegas , Las Vegas , Nevada 89154 , United States
| | - Weiwei Zhang
- College of Science , China Agricultural University , Beijing 100083 , China
| | - Qiang Zhu
- Department of Physics and Astronomy, High Pressure Science and Engineering Center , University of Nevada, Las Vegas , Las Vegas , Nevada 89154 , United States
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48
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Wu J, Li J, Gong Y, Kitano M, Inoshita T, Hosono H. Intermetallic Electride Catalyst as a Platform for Ammonia Synthesis. Angew Chem Int Ed Engl 2019; 58:825-829. [DOI: 10.1002/anie.201812131] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Jiazhen Wu
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
| | - Jiang Li
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
| | - Yutong Gong
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
| | - Masaaki Kitano
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
| | - Takeshi Inoshita
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
- National Institute for Materials Science Tsukuba Ibaraki 305-0044 Japan
| | - Hideo Hosono
- Materials Research Center for Element StrategyTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
- Laboratory for Materials and Structures, Institute of Innovative ResearchTokyo Institute of Technology 4259 Nagatsuta Midori-ku, Yokohama 226-8503 Japan
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49
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Chen X, Liang C. Transition metal silicides: fundamentals, preparation and catalytic applications. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00533a] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Transition metal silicides as low-cost and earth-abundant inorganic materials are becoming indispensable constituents in catalytic systems for a variety of applications and exhibit excellent properties for sustainable industrial process.
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Affiliation(s)
- Xiao Chen
- State Key Laboratory of Fine Chemicals
- Laboratory of Advanced Materials and Catalytic Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Changhai Liang
- State Key Laboratory of Fine Chemicals
- Laboratory of Advanced Materials and Catalytic Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
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50
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Jiang D, Zhao Z, Mu S, Qian H, Tong J. Facile and Massive Aluminothermic Synthesis of Mayenite Electrides from Cost-Effective Oxide and Metal Precursors. Inorg Chem 2018; 58:960-967. [DOI: 10.1021/acs.inorgchem.8b03116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dong Jiang
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Zeyu Zhao
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Shenglong Mu
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Haijun Qian
- Electron Microscope Facility, Clemson University, Anderson, South Carolina 29625, United States
| | - Jianhua Tong
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
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