1
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Zhang Y, Wu Y, Zhou P, Song Z, Jia Y, Ouyang W, Luque R, Sun Y. Effects of Using Aluminum Sulfate as an Accelerator and Acrylic Acid, Aluminum Fluoride, or Alkanolamine as a Regulator in Early Cement Setting. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1620. [PMID: 36837248 PMCID: PMC9962442 DOI: 10.3390/ma16041620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/19/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Aluminum sulfate was employed as the main accelerator in order to explore new non-chloride and alkali-free cement accelerators. Acrylic acid, aluminum fluoride, or alkanolamine were used as regulators to further accelerate cement setting. The setting time, compressive, and flexural strengths in cement early strength progress were detected, and both the cement (raw material) and hydrated mortar were fully characterized. The cement setting experiments revealed that only loading acrylic acid as the regulator would decrease the setting time of cement and increase the compressive and flexural strengths of mortar, but further introduction of aluminum fluoride or alkanolamine improved this process drastically. In the meantime, structural characterizations indicated that the raw material (cement) used in this work was composed of C3S (alite), while hydrated mortar consisted of quartz and C3A (tricalcium aluminate). During this transformation, the coordination polyhedron of Al3+ was changed from a tetrahedron to octahedron. This work puts forward a significant strategy for promoting the activity of aluminum sulfate in cement setting and would contribute to the future design of new non-chloride and alkali-free cement accelerators.
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Affiliation(s)
- Yihong Zhang
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
| | - Yong Wu
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
| | - Puyu Zhou
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
| | - Zhiyuan Song
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
| | - Yayun Jia
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
| | - Weiyi Ouyang
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
| | - Rafael Luque
- Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., 117198 Moscow, Russia
- Universidad ECOTEC, Km 13.5 Samborondón, Samborondón EC092302, Ecuador
| | - Yang Sun
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
- Shanxi Jiawei New Material Co., Ltd., Taijia Village, Jiedian Town, Wanrong County, Yuncheng 044200, China
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2
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Wang W, Liu W, Kamiko M, Yagi S. Enhanced catalytic activity of perovskite La 1−xSr xMnO 3+δ for the oxygen reduction reaction. NEW J CHEM 2022. [DOI: 10.1039/d2nj02619h] [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 relationship between the ORR catalytic activity of LaMnO3+δ and its Mn–O bond length was examined by replacing La with Sr, and it was found that the shorter the bond length, the higher the activity.
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Affiliation(s)
- Wencong Wang
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Wei Liu
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Masao Kamiko
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Shunsuke Yagi
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
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3
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Filimonenkov IS, Istomin SY, Rotonnelli B, Gallet JJ, Bournel F, Antipov EV, Savinova ER, Tsirlina GA. Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Zhou M, Liu J, Ye Y, Sun X, Chen H, Zhou D, Yin Y, Zhang N, Ling Y, Ciucci F, Chen Y. Enhancing the Intrinsic Activity and Stability of Perovskite Cobaltite at Elevated Temperature Through Surface Stress. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2104144. [PMID: 34605170 DOI: 10.1002/smll.202104144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/27/2021] [Indexed: 06/13/2023]
Abstract
Perovskite-based oxides attract great attention as catalysts for energy and environmental devices. Nanostructure engineering is demonstrated as an effective approach for improving the catalytic activity of the materials. The mechanism for the enhancement, nevertheless, is still not fully understood. In this study, it is demonstrated that compressive strain can be introduced into freestanding perovskite cobaltite La0.8 Sr0.2 CoO3- δ (LSC) nanofibers with sufficient small size. Crystal structure analysis suggests that the LSC fiber is characterized by compressive strain along the ab plane and less distorted CoO6 octahedron compared to the bulk powder sample. Accompanied by such structural changes, the nanofiber shows significantly higher oxygen reduction reaction (ORR) activity and better stability at elevated temperature, which is attributed to the higher oxygen vacancy concentration and suppressed Sr segregation in the LSC nanofibers. First-principle calculations further suggest that the compressive strain in LSC nanofibers effectively shortens the distance between the Co 3d and O 2p band center and lowers the oxygen vacancy formation energy. The results clarify the critical role of surface stress in determining the intrinsic activity of perovskite oxide nanomaterials. The results of this work can help guide the design of highly active and durable perovskite catalysts via nanostructure engineering.
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Affiliation(s)
- Mengzhen Zhou
- State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology, Guangzhou, 510000, China
| | - Jiapeng Liu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, 999077, China
| | - Yongjian Ye
- State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology, Guangzhou, 510000, China
| | - Xiang Sun
- State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology, Guangzhou, 510000, China
| | - Huijun Chen
- State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology, Guangzhou, 510000, China
| | - Deng Zhou
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Yimei Yin
- Institute of Electrochemical & Energy Technology, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Nian Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Yihan Ling
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Francesco Ciucci
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, 999077, China
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, 999077, China
| | - Yan Chen
- State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology, Guangzhou, 510000, China
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6
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Sakamaki A, Ogihara H, Yoshida-Hirahara M, Kurokawa H. Precursor accumulation on nanocarbons for the synthesis of LaCoO 3 nanoparticles as electrocatalysts for oxygen evolution reaction. RSC Adv 2021; 11:20313-20321. [PMID: 35479911 PMCID: PMC9034031 DOI: 10.1039/d1ra03762e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 06/02/2021] [Indexed: 01/03/2023] Open
Abstract
Oxygen evolution reaction (OER) is a key step in energy storage devices. Lanthanum cobaltite (LaCoO3) perovskite is an active catalyst for OER in alkaline solutions, and it is expected to be a low-cost alternative to the state-of-the-art catalysts (IrO2 and RuO2) because transition metals are abundant and inexpensive. For efficient catalysis with LaCoO3, nanosized LaCoO3 with a high surface area is desirable for increasing the number of catalytically active sites. In this study, we developed a novel synthetic route for LaCoO3 nanoparticles by accumulating the precursor molecules over nanocarbons. This precursor accumulation (PA) method for LaCoO3 nanoparticle synthesis is simple and involves the following steps: (1) a commercially available carbon powder is soaked in a solution of the nitrate salts of lanthanum and cobalt and (2) the sample is dried and calcined in air. The LaCoO3 nanoparticles prepared by the PA method have a high specific surface area (12 m2 g−1), comparable to that of conventional LaCoO3 nanoparticles. The morphology of the LaCoO3 nanoparticles is affected by the nanocarbon type, and LaCoO3 nanoparticles with diameters of less than 100 nm were obtained when carbon black (Ketjen black) was used as the support. Further, the sulfur impurities in nanocarbons significantly influence the formation of the perovskite structure. The prepared LaCoO3 nanoparticles show excellent OER activity owing to their high surface area and perovskite structure. The Tafel slope of these LaCoO3 nanoparticles is as low as that of the previously reported active LaCoO3 catalyst. The results strongly suggest that the PA method provides nanosized LaCoO3 without requiring the precise control of chemical reactions, harsh conditions, and/or special apparatus, indicating that it is promising for producing active OER catalysts at a large scale. A simple synthetic process for LaCoO3 nanoparticles based on the accumulation of precursors on nanocarbon supports was presented. The LaCoO3 nanoparticles showed excellent OER activity owing to their high surface area and perovskite structure.![]()
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Affiliation(s)
- Aoi Sakamaki
- Graduate School of Science and Engineering, Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
| | - Hitoshi Ogihara
- Graduate School of Science and Engineering, Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
| | - Miru Yoshida-Hirahara
- Graduate School of Science and Engineering, Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
| | - Hideki Kurokawa
- Graduate School of Science and Engineering, Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
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7
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Porotnikova N, Farlenkov A, Naumov S, Vlasov M, Khodimchuk A, Fetisov A, Ananyev M. Effect of grain boundaries in La 0.84Sr 0.16CoO 3-δ on oxygen diffusivity and surface exchange kinetics. Phys Chem Chem Phys 2021; 23:11272-11286. [PMID: 33972961 DOI: 10.1039/d1cp01099a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The single crystal and polycrystalline specimens of La0.84Sr0.16CoO3-δ oxide were synthesized and characterized by X-ray powder diffraction analysis, energy dispersive X-ray microanalysis, the electron backscatter diffraction technique, and X-ray photoelectron spectroscopy. A thin slab was prepared from the grown single crystal with its surface corresponding to the (110) plane. The kinetics of the oxygen exchange between the gas phase and a single crystal and a polycrystalline specimen was studied by means of 16O/18O oxygen isotope exchange at T = 750-850 °C and PO2 = 5.3 × 10-3-2.2 × 10-2 atm. Temperature dependencies of the oxygen heterogeneous exchange rate, the oxygen dissociative adsorption and incorporation rates, and oxygen diffusion coefficients were obtained. The relationship between the crystallographic orientation of oxides and the kinetic parameters of oxides has been established. Correlations between the surface state and the rates of individual stages of oxygen exchange as well as oxygen diffusion pathways in the single crystal compared with those in the polycrystalline specimen are considered.
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Affiliation(s)
- Natalia Porotnikova
- Institute of High Temperature Electrochemistry, UB RAS, Ekaterinburg, Russia.
| | - Andrei Farlenkov
- Ural Federal University named after the First President of Russia B.N. Yeltsin, Ekaterinburg, Russia
| | - Sergey Naumov
- Institute of Metal Physics, UB RAS, Ekaterinburg, Russia
| | - Maxim Vlasov
- Institute of High Temperature Electrochemistry, UB RAS, Ekaterinburg, Russia.
| | - Anna Khodimchuk
- Institute of High Temperature Electrochemistry, UB RAS, Ekaterinburg, Russia.
| | | | - Maxim Ananyev
- Ural Federal University named after the First President of Russia B.N. Yeltsin, Ekaterinburg, Russia
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8
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Yang J, Jia Y, Fan C, Cheng Y, Pan C, Huang B, Meng X, Zhang J, Zheng A, Ma X, Li X, Luque R, Sun Y. Aqueous Room Temperature Mono-Dehydration of Sugar Alcohols Using Functionalized Yttrium Oxide Nanocatalysts. Front Chem 2020; 8:532. [PMID: 32793546 PMCID: PMC7390900 DOI: 10.3389/fchem.2020.00532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 05/25/2020] [Indexed: 11/13/2022] Open
Abstract
The aqueous room temperature mono-dehydration of sugar alcohols (D-sorbitol and D-mannitol) was conducted using functionalized yttrium oxide nanocatalysts prepared via sol-gel methods. Materials exhibited high selectivity to mono-dehydration products. Solvent and catalyst effects were also investigated and discussed. The introduction of titanium into the yttrium oxide framework would decrease both substrate conversion and mono-dehydration efficiency. In addition, studies of the catalytic mechanism indicate high mono-dehydration efficiency may come from the stability of the formed intermediate during catalysis. This work provides a highly efficient and benign system for catalytic mono-dehydration of sugar alcohols.
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Affiliation(s)
- Juncheng Yang
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Yihong Jia
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Chao Fan
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Yu Cheng
- Shaanxi Key Laboratory of Ophthalmology, Clinical Research Center for Ophthalmology Diseases of Shaanxi Province, Shaanxi Institute of Ophthalmology, Xi'an No. 1 Hospital, First Affiliated Hospital of Northwestern University, Xi'an, China
| | - Cheng Pan
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Benhua Huang
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Xu Meng
- School of Material Science and Engineering, Xi'an University of Science and Technology, Xi'an, China
| | - Junjie Zhang
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Aqun Zheng
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Xiaomo Ma
- College of Humanities and Social Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Xiaoyong Li
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Rafael Luque
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China.,Departamento de Quimica Organica, Universidad de Cordoba, Cordoba, Spain
| | - Yang Sun
- Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China
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9
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Synthesis of Ti-Al binary oxides and their catalytic application for C-H halogenation of phenols, aldehydes and ketones. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Duan Y, Yu Z, Hu S, Zheng X, Zhang C, Ding H, Hu B, Fu Q, Yu Z, Zheng X, Zhu J, Gao M, Yu S. Scaled‐Up Synthesis of Amorphous NiFeMo Oxides and Their Rapid Surface Reconstruction for Superior Oxygen Evolution Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909939] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Duan
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Zi‐You Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Shao‐Jin Hu
- Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at Microscale CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China
| | - Xu‐Sheng Zheng
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Chu‐Tian Zhang
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Hong‐He Ding
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Bi‐Cheng Hu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Qi‐Qi Fu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Zhi‐Long Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Xiao Zheng
- Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at Microscale CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China
| | - Jun‐Fa Zhu
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Min‐Rui Gao
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Shu‐Hong Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Dalian National Laboratory for Clean Energy Dalian 116023 China
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11
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Duan Y, Yu Z, Hu S, Zheng X, Zhang C, Ding H, Hu B, Fu Q, Yu Z, Zheng X, Zhu J, Gao M, Yu S. Scaled‐Up Synthesis of Amorphous NiFeMo Oxides and Their Rapid Surface Reconstruction for Superior Oxygen Evolution Catalysis. Angew Chem Int Ed Engl 2019; 58:15772-15777. [DOI: 10.1002/anie.201909939] [Citation(s) in RCA: 229] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Yu Duan
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Zi‐You Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Shao‐Jin Hu
- Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at Microscale CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China
| | - Xu‐Sheng Zheng
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Chu‐Tian Zhang
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Hong‐He Ding
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Bi‐Cheng Hu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Qi‐Qi Fu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Zhi‐Long Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Xiao Zheng
- Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at Microscale CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China
| | - Jun‐Fa Zhu
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China
| | - Min‐Rui Gao
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Shu‐Hong Yu
- Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Nanoscience Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Dalian National Laboratory for Clean Energy Dalian 116023 China
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12
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Wang X, Pan Z, Chu X, Huang K, Cong Y, Cao R, Sarangi R, Li L, Li G, Feng S. Atomic‐Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co
3
O
4
/La
0.3
Sr
0.7
CoO
3. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905543] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiyang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Ziye Pan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Xuefeng Chu
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving School of Electrical and Electronic Information Engineering Jilin Jianzhu University Changchun 130118 P. R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Yingge Cong
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Rui Cao
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Guangshe Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
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13
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Wang X, Pan Z, Chu X, Huang K, Cong Y, Cao R, Sarangi R, Li L, Li G, Feng S. Atomic‐Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co
3
O
4
/La
0.3
Sr
0.7
CoO
3. Angew Chem Int Ed Engl 2019; 58:11720-11725. [DOI: 10.1002/anie.201905543] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Xiyang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Ziye Pan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Xuefeng Chu
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving School of Electrical and Electronic Information Engineering Jilin Jianzhu University Changchun 130118 P. R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Yingge Cong
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Rui Cao
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Guangshe Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
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14
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Sato A, Ogo S, Takeno Y, Takise K, Seo JG, Sekine Y. Electric Field and Mobile Oxygen Promote Low-Temperature Oxidative Coupling of Methane over La 1-x Ca x AlO 3-δ Perovskite Catalysts. ACS OMEGA 2019; 4:10438-10443. [PMID: 31460139 PMCID: PMC6648777 DOI: 10.1021/acsomega.9b00594] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 05/31/2019] [Indexed: 06/10/2023]
Abstract
Oxidative coupling of methane (OCM) over La1-x M x AlO3-δ (M = Ca, Sr, Ba; x = 0, 0.1, 0.2, 0.3) in an electric field at low temperature (423 K) was investigated. Among the tested catalysts, the La0.7Ca0.3AlO3-δ catalyst showed the highest performance in terms of C2H6 + C2H4 yield (11.1%). Surface mobile oxygen species (O2 2- or O-), which were considered as active oxygen species for the OCM reaction, increased with increasing Ca doping amount, and thereby the La0.7Ca0.3AlO3-δ catalyst showed the best catalytic activity.
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Affiliation(s)
- Ayaka Sato
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Shuhei Ogo
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
- PRESTO, Japan Science and Technology Agency
(JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yuna Takeno
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Kent Takise
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Jeong Gil Seo
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
- Department
of Energy Science and Technology, Myongji
University, Nam-dong, Cheoin-gu, Yongin-si, Gyeonggi-do 449-728 South Korea
| | - Yasushi Sekine
- Department
of Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
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15
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Stoerzinger KA, Renshaw Wang X, Hwang J, Rao RR, Hong WT, Rouleau CM, Lee D, Yu Y, Crumlin EJ, Shao-Horn Y. Speciation and Electronic Structure of La1−xSrxCoO3−δ During Oxygen Electrolysis. Top Catal 2018. [DOI: 10.1007/s11244-018-1070-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Wang X, Huang K, Yuan L, Li S, Ma W, Liu Z, Feng S. Molten Salt Flux Synthesis, Crystal Facet Design, Characterization, Electronic Structure, and Catalytic Properties of Perovskite Cobaltite. ACS APPLIED MATERIALS & INTERFACES 2018; 10:28219-28231. [PMID: 30052421 DOI: 10.1021/acsami.8b08621] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a simple and cost-effective molten salt synthetic route toward phase-pure perovskite cobaltite microcrystallines and successfully regulate different crystal facets for perovskite LaCoO3 by the strong interaction between Cl- anions and Sr2+ cations in molten salt system and polar plane. We then take LaCoO3 (100 and 110), LaCoO3 (111), and La0.7Sr0.3CoO3 (111) as comparison models, and we characterize their crystal structure, morphology, composition, electronic state, and catalytic properties. X-ray photoelectron spectroscopy (XPS) shows that the prepared samples with high-energy (111) crystal facets contain more surface oxygen species and active Co ions than La enrichment perovskite LaCoO3 (110 and 100) on the surface. Furthermore, combining with ambient-pressure XAS, valence band spectroscopy, and density functional calculations, we find that exposed high-energy (111) crystal facets and doping Sr ions can enhance the hybridization between Co cations and O anions and their O p-band center is closer to the Fermi level, compared with that of LaCoO3 (100 and 110). As expected, the samples with high-energy (111) crystal facets show better CO oxidation activity than LaCoO3 (100 and 110), and La0.7Sr0.3CoO3 (111) exhibits the highest catalytic activity. Our findings provide a new avenue to prepare high-energy facet perovskite catalysts and we also clearly reveal the relationship between surface electronic structure and intrinsic CO oxidation activity of perovskite cobaltite.
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Affiliation(s)
- Xiyang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Long Yuan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Shuang Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Wei Ma
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Zhongyuan Liu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
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17
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Wu J, Li X, Shi W, Ling P, Sun Y, Jiao X, Gao S, Liang L, Xu J, Yan W, Wang C, Xie Y. Efficient Visible‐Light‐Driven CO
2
Reduction Mediated by Defect‐Engineered BiOBr Atomic Layers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803514] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ju Wu
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Xiaodong Li
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Wen Shi
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Peiquan Ling
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Yongfu Sun
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Xingchen Jiao
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Shan Gao
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Liang Liang
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Jiaqi Xu
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Wensheng Yan
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at Microscale University of Science & Technology of China Hefei Anhui 230026 P.R. China
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18
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Wu J, Li X, Shi W, Ling P, Sun Y, Jiao X, Gao S, Liang L, Xu J, Yan W, Wang C, Xie Y. Efficient Visible-Light-Driven CO 2 Reduction Mediated by Defect-Engineered BiOBr Atomic Layers. Angew Chem Int Ed Engl 2018; 57:8719-8723. [PMID: 29761617 DOI: 10.1002/anie.201803514] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/27/2018] [Indexed: 11/06/2022]
Abstract
Solar CO2 reduction efficiency is largely limited by poor photoabsorption, sluggish electron-hole separation, and a high CO2 activation barrier. Defect engineering was employed to optimize these crucial processes. As a prototype, BiOBr atomic layers were fabricated and abundant oxygen vacancies were deliberately created on their surfaces. X-ray absorption near-edge structure and electron paramagnetic resonance spectra confirm the formation of oxygen vacancies. Theoretical calculations reveal the creation of new defect levels resulting from the oxygen vacancies, which extends the photoresponse into the visible-light region. The charge delocalization around the oxygen vacancies contributes to CO2 conversion into COOH* intermediate, which was confirmed by in situ Fourier-transform infrared spectroscopy. Surface photovoltage spectra and time-resolved fluorescence emission decay spectra indicate that the introduced oxygen vacancies promote the separation of carriers. As a result, the oxygen-deficient BiOBr atomic layers achieve visible-light-driven CO2 reduction with a CO formation rate of 87.4 μmol g-1 h-1 , which was not only 20 and 24 times higher than that of BiOBr atomic layers and bulk BiOBr, respectively, but also outperformed most previously reported single photocatalysts under comparable conditions.
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Affiliation(s)
- Ju Wu
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Xiaodong Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Wen Shi
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Peiquan Ling
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Yongfu Sun
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Xingchen Jiao
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Shan Gao
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Liang Liang
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Jiaqi Xu
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Wensheng Yan
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, Anhui, 230026, P.R. China
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19
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Li J, Wang J, Kuang H, Zhang HR, Zhao YY, Qiao KM, Wang F, Liu W, Wang W, Peng LC, Zhang Y, Yu RC, Hu FX, Sun JR, Shen BG. Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La 0.7Sr 0.3CoO 3 film. NANOSCALE 2017; 9:13214-13221. [PMID: 28853487 DOI: 10.1039/c7nr03162a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Introducing and modulating the oxygen deficiency concentration have been received as an effective way to obtain high catalytic activity in perovskite oxides. However, it is difficult to control the oxygen vacancy in conventional oxygen defect engineering due to harsh reaction conditions at elevated temperatures and the reducing atmosphere, which make it impractical for many technological applications. Herein, we report a new approach to oxygen defect engineering based on the combination of the current effect and temperature cycling at low temperature. Our investigations revealed that the electrical conductivity of the (011)-La0.7Sr0.3CoO3/PMN-PT film changes continuously from metallicity to insulativity under repeated transport measurements below room temperature, which indicates the transformation of the Co4+ state to Co3+ in the film. Further experiments and analysis revealed that oxygen vacancies can be well regulated by the combined current effect and temperature cycling in repeated measurements, which results in a decrease of Co4+/Co3+ and thus the remarkable variation of conductive properties of the film. Our work provides a simple and highly efficient method to engineer oxygen vacancies in perovskite-type oxides and brings new opportunities in designing high-efficiency oxidation catalysts.
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Affiliation(s)
- J Li
- Beijing National Laboratory for Condensed Matter Physics and State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
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20
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Wang X, Huang K, Ma W, Cong Y, Ge C, Feng S. Defect Engineering, Electronic Structure, and Catalytic Properties of Perovskite Oxide La0.5Sr0.5CoO3−δ. Chemistry 2016; 23:1093-1100. [DOI: 10.1002/chem.201604065] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Xiyang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Wei Ma
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Yingge Cong
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Chengda Ge
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 P.R. China
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21
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Walter J, Wang H, Luo B, Frisbie CD, Leighton C. Electrostatic versus Electrochemical Doping and Control of Ferromagnetism in Ion-Gel-Gated Ultrathin La0.5Sr0.5CoO3-δ. ACS NANO 2016; 10:7799-810. [PMID: 27479878 DOI: 10.1021/acsnano.6b03403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Recently, electrolyte gating techniques employing ionic liquids/gels in electric double layer transistors have proven remarkably effective in tuning charge carrier density in a variety of materials. The ability to control surface carrier densities at levels above 10(14) cm(-2) has led to widespread use in the study of superconductivity, insulator-metal transitions, etc. In many cases, controversy remains over the doping mechanism, however (i.e., electrostatic vs electrochemical (e.g., redox-based)), and the technique has been less applied to magnetic materials. Here, we discuss ion gel gating of nanoscale 8-unit-cell-thick hole-doped La0.5Sr0.5CoO3-δ (LSCO) films, probing in detail the critical bias windows and doping mechanisms. The LSCO films, which are under compressive stress on LaAlO3(001) substrates, are metallic and ferromagnetic (Curie temperature, TC ∼ 170 K), with strong anomalous Hall effect and perpendicular magnetic anisotropy. Transport measurements reveal that negative gate biases lead to reversible hole accumulation (i.e., predominantly electrostatic operation) up to some threshold, whereas positive bias immediately induces irreversibility. Experiments in inert/O2 atmospheres directly implicate oxygen vacancies in this irreversibility, supported by atomic force microscopy and X-ray photoelectron spectroscopy. The results are thus of general importance, suggesting that hole- and electron-doped oxides may respond very differently to electrolyte gating. Reversible voltage control of electronic/magnetic properties is then demonstrated under hole accumulation, including resistivity, magnetoresistance, and TC. The sizable anomalous Hall coefficient and perpendicular anisotropy in LSCO provide a particularly powerful probe of magnetism, enabling direct extraction of the voltage-dependent order parameter and TC shift. The latter amounts to ∼7%, with potential for much stronger modulation at lower Sr doping.
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Affiliation(s)
- Jeff Walter
- Department of Chemical Engineering and Materials Science and ‡Characterization Facility, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Helin Wang
- Department of Chemical Engineering and Materials Science and ‡Characterization Facility, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Bing Luo
- Department of Chemical Engineering and Materials Science and ‡Characterization Facility, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - C Daniel Frisbie
- Department of Chemical Engineering and Materials Science and ‡Characterization Facility, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Chris Leighton
- Department of Chemical Engineering and Materials Science and ‡Characterization Facility, University of Minnesota , Minneapolis, Minnesota 55455, United States
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22
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Water electrolysis on La(1-x)Sr(x)CoO(3-δ) perovskite electrocatalysts. Nat Commun 2016; 7:11053. [PMID: 27006166 PMCID: PMC4814573 DOI: 10.1038/ncomms11053] [Citation(s) in RCA: 378] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 02/16/2016] [Indexed: 12/21/2022] Open
Abstract
Perovskite oxides are attractive candidates as catalysts for the electrolysis of water in alkaline energy storage and conversion systems. However, the rational design of active catalysts has been hampered by the lack of understanding of the mechanism of water electrolysis on perovskite surfaces. Key parameters that have been overlooked include the role of oxygen vacancies, B–O bond covalency, and redox activity of lattice oxygen species. Here we present a series of cobaltite perovskites where the covalency of the Co–O bond and the concentration of oxygen vacancies are controlled through Sr2+ substitution into La1−xSrxCoO3−δ. We attempt to rationalize the high activities of La1−xSrxCoO3−δ through the electronic structure and participation of lattice oxygen in the mechanism of water electrolysis as revealed through ab initio modelling. Using this approach, we report a material, SrCoO2.7, with a high, room temperature-specific activity and mass activity towards alkaline water electrolysis. Perovskite oxides are attractive candidates as catalysts for water electrolysis however their rational design is rare. Here, the authors report a series of cobaltite perovskites where the covalency of the Co-O bond and concentration of oxygen vacancies are controlled, and assess their catalytic performance.
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23
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Lai SY, Ding D, Liu M, Liu M, Alamgir FM. Operando and in situ X-ray spectroscopies of degradation in La0.6Sr0.4Co0.2Fe0.8O(3-δ) thin film cathodes in fuel cells. CHEMSUSCHEM 2014; 7:3078-3087. [PMID: 25205041 DOI: 10.1002/cssc.201402670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Indexed: 06/03/2023]
Abstract
Information from ex situ characterization can fall short in describing complex materials systems simultaneously exposed to multiple external stimuli. Operando X-ray absorption spectroscopy (XAS) was used to probe the local atomistic and electronic structure of specific elements in a La0.6Sr0.4Co0.2Fe0.8O(3-δ) (LSCF) thin film cathode exposed to air contaminated with H2O and CO2 under operating conditions. While impedance spectroscopy showed that the polarization resistance of the LSCF cathode increased upon exposure to both contaminants at 750 °C, XAS near-edge and extended fine structure showed that the degree of oxidation for Fe and Co decreases with increasing temperature. Synchrotron-based X-ray photoelectron spectroscopy tracked the formation and removal of a carbonate species, a Co phase, and different oxygen moieties as functions of temperature and gas. The combined information provides insight into the fundamental mechanism by which H2O and CO2 cause degradation in the cathode of solid oxide fuel cells.
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Affiliation(s)
- Samson Y Lai
- Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive NW, Atlanta, GA 30332-0245 (USA)
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24
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Zhu J, Li H, Zhong L, Xiao P, Xu X, Yang X, Zhao Z, Li J. Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis. ACS Catal 2014. [DOI: 10.1021/cs500606g] [Citation(s) in RCA: 556] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Junjiang Zhu
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
| | - Hailong Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
| | - Linyun Zhong
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
| | - Ping Xiao
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
| | - Xuelian Xu
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
| | - Xiangguang Yang
- State
Key Laboratory of Rare Earth Resource Utilization, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin
Street, Changchun 130022, China
| | - Zhen Zhao
- State
Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, 18 Fuxue Road, Chang Ping, Beijing 102249, China
| | - Jinlin Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, 182 minzudadao, Wuhan 430074, China
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25
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Zhou J, Duchesne PN, Hu Y, Wang J, Zhang P, Li Y, Regier T, Dai H. Fe–N bonding in a carbon nanotube–graphene complex for oxygen reduction: an XAS study. Phys Chem Chem Phys 2014; 16:15787-91. [DOI: 10.1039/c4cp01455c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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26
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Thermoelectric misfit-layered cobalt oxides with interlayers of hydroxide and peroxide species. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Ye J, Yu Y, Meng M, Jiang Z, Ding T, Zhang S, Huang Y. Highly efficient NOx purification in alternating lean/rich atmospheres over non-platinic mesoporous perovskite-based catalyst K/LaCoO3. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00155e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Zhao Z, Dai H, Deng J, Du Y, Liu Y, Zhang L. Preparation of three-dimensionally ordered macroporous La0.6Sr0.4Fe0.8Bi0.2O3−δ and their excellent catalytic performance for the combustion of toluene. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2012.09.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Carabalí G, Chavira E, Castro I, Bucio E, Huerta L, Jiménez-Mier J. Novel sol–gel methodology to produce LaCoO3 by acrylamide polymerization assisted by γ-irradiation. Radiat Phys Chem Oxf Engl 1993 2012. [DOI: 10.1016/j.radphyschem.2012.01.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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30
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Catalytic performance in methane combustion of rare-earth perovskites RECo0.50Mn0.50O3 (RE: La, Er, Y). Catal Today 2011. [DOI: 10.1016/j.cattod.2011.02.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Li WW, Hu ZG, Li YW, Zhu M, Zhu ZQ, Chu JH. Growth, microstructure, and infrared-ultraviolet optical conductivity of La(0.5)Sr(0.5)CoO(3) nanocrystalline films on silicon substrates by pulsed laser deposition. ACS APPLIED MATERIALS & INTERFACES 2010; 2:896-902. [PMID: 20356296 DOI: 10.1021/am900868a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
La(0.5)Sr(0.5)CoO(3) (LSCO) nanocrystalline (nc) films have been directly grown on silicon wafers under different substrate temperatures by pulsed laser deposition. The X-ray diffraction analysis indicate that the films are polycrystalline with the pure perovskite phase at higher substrate temperatures. The columnar growth formation with the nanocrystalline structure in the films has been confirmed by microscopy experiments. Infrared-ultraviolet optical properties of the LSCO films have been investigated with the aid of spectroscopic ellipsometry (SE). Dielectric function in the photon energy range of 1.1-3.1 eV (400-1100 nm) has been extracted by reproducing the experimental data with a Lorentz oscillator model. It is found that the real part is decreased from 4.7 to -0.7 at the near-infrared region with increasing substrate temperature. The optical conductivity shows a different variation trend for the lower and higher growth temperatures, respectively. Note that the films deposited above 650 degrees C exhibit the well-defined metallic phase behavior. The discrepancies could be mainly ascribed to different crystalline structure and surface morphology. The present results may be crucial for future applications of ferromagnetic-based optoelectronic and spin-electronic devices.
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Affiliation(s)
- W W Li
- Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241, People's Republic of China
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32
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Pecchi G, Reyes P, Zamora R, Campos C, Cadús LE, Barbero BP. Effect of the preparation method on the catalytic activity of La1−xCaxFeO3 perovskite-type oxides. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.11.011] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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