1
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Wang R, Wang ZY, Zhang Y, Shaheer ARM, Liu TF, Cao R. Bridging Atom Engineering for Low-Temperature Oxygen Activation in a Robust Metal-Organic Framework. Angew Chem Int Ed Engl 2024:e202400160. [PMID: 38523066 DOI: 10.1002/anie.202400160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/22/2024] [Accepted: 03/22/2024] [Indexed: 03/26/2024]
Abstract
Achieving active site engineering at the atomic level poses a significant challenge in the design and optimization of catalysts for energy-efficient catalytic processes, especially for a reaction with two reactants competitively absorbed on catalytic active sites. Herein, we show an example that tailoring the local environment of cobalt sites in a robust metal-organic framework through substituting the bridging atom from -Cl to -OH group leads to a highly active catalyst for oxygen activation in an oxidation reaction. Comprehensive characterizations reveal that this variation imparts drastic changes on the electronic structure of metal centers, the competitive reactant adsorption behavior, and the intermediate formation. As a result, exceptional low-temperature CO oxidation performance was achieved with T25(Temperature for 25 % conversion)=35 °C and T100 (Temperature for 100 % conversion)=150 °C, which stands out from existing MOF-based catalysts and even rivals many noble metal catalysts. This work provides a guidance for the rational design of catalysts for efficient oxygen activation for an oxidation reaction.
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Affiliation(s)
- Rui Wang
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
- Department of Chemistry School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zi-Yu Wang
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
| | - Yuan Zhang
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
| | - A R Mahammed Shaheer
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
| | - Tian-Fu Liu
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Rong Cao
- State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350108, P. R. China
- Department of Chemistry School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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2
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Ding J, Du P, Zhu J, Hu Q, He D, Wu Y, Liu W, Zhu S, Yan W, Hu J, Zhu J, Chen Q, Jiao X, Xie Y. Light-Driven C-C Coupling for Targeted Synthesis of CH 3 COOH with Nearly 100 % Selectivity from CO 2. Angew Chem Int Ed Engl 2024; 63:e202400828. [PMID: 38326235 DOI: 10.1002/anie.202400828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/09/2024]
Abstract
Targeted synthesis of acetic acid (CH3 COOH) from CO2 photoreduction under mild conditions mainly limits by the kinetic challenge of the C-C coupling. Herein, we utilized doping engineering to build charge-asymmetrical metal pair sites for boosted C-C coupling, enhancing the activity and selectivity of CO2 photoreduction towards CH3 COOH. As a prototype, the Pd doped Co3 O4 atomic layers are synthesized, where the established charge-asymmetrical cobalt pair sites are verified by X-ray photoelectron spectroscopy and X-ray absorption near edge spectroscopy spectra. Theoretical calculations not only reveal the charge-asymmetrical cobalt pair sites caused by Pd atom doping, but also manifest the promoted C-C coupling of double *COOH intermediates through shortening of the coupled C-C bond distance from 1.54 to 1.52 Å and lowering their formation energy barrier from 0.77 to 0.33 eV. Importantly, the decreased reaction energy barrier from the protonation of two*COOH into *CO intermediates for the Pd-Co3 O4 atomic layer slab is 0.49 eV, higher than that of the Co3 O4 atomic layer slab (0.41 eV). Therefore, the Pd-Co3 O4 atomic layers exhibit the CH3 COOH evolution rate of ca. 13.8 μmol g-1 h-1 with near 100% selectivity, both of which outperform all previously reported single photocatalysts for CO2 photoreduction towards CH3 COOH under similar conditions.
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Affiliation(s)
- Jinyu Ding
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Peijin Du
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Juncheng Zhu
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Qing Hu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Dongpo He
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Yang Wu
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Wenxiu Liu
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Shan Zhu
- State Grid Anhui Electric Power Research Institute, 230601, Hefei, China
| | - Wensheng Yan
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Jun Hu
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Junfa Zhu
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
| | - Qingxia Chen
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Xingchen Jiao
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China
| | - Yi Xie
- Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026, Hefei, China
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3
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Correa JDS, Primo JDO, Balaba N, Pratsch C, Werner S, Toma HE, Anaissi FJ, Wattiez R, Zanette CM, Onderwater RCA, Bittencourt C. Copper(II) and Cobalt(II) Complexes Based on Abietate Ligands from Pinus Resin: Synthesis, Characterization and Their Antibacterial and Antiviral Activity against SARS-CoV-2. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1202. [PMID: 37049296 PMCID: PMC10096983 DOI: 10.3390/nano13071202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Co-abietate and Cu-abietate complexes were obtained by a low-cost and eco-friendly route. The synthesis process used Pinus elliottii resin and an aqueous solution of CuSO4/CoSO4 at a mild temperature (80 °C) without organic solvents. The obtained complexes are functional pigments for commercial architectural paints with antipathogenic activity. The pigments were characterized by Fourier-transform infrared spectroscopy (FTIR), mass spectrometry (MS), thermogravimetry (TG), near-edge X-ray absorption fine structure (NEXAFS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and colorimetric analysis. In addition, the antibacterial efficiency was evaluated using the minimum inhibitory concentration (MIC) test, and the antiviral tests followed an adaptation of the ISO 21702:2019 guideline. Finally, virus inactivation was measured using the RT-PCR protocol using 10% (w/w) of abietate complex in commercial white paint. The Co-abietate and Cu-abietate showed inactivation of >4 log against SARS-CoV-2 and a MIC value of 4.50 µg·mL-1 against both bacteria Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The results suggest that the obtained Co-abietate and Cu-abietate complexes could be applied as pigments in architectural paints for healthcare centers, homes, and public places.
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Affiliation(s)
- Jamille de S. Correa
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Julia de O. Primo
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Nayara Balaba
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Christoph Pratsch
- Department X-ray Microscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Stephan Werner
- Department X-ray Microscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Henrique E. Toma
- Institute of Chemistry, University of São Paulo, São Paulo 05508-000, SP, Brazil
| | - Fauze J. Anaissi
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Ruddy Wattiez
- Department of Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium;
| | - Cristina M. Zanette
- Department of Food Engineering, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | | | - Carla Bittencourt
- Department of Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium;
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Angel S, Braun M, Alkan B, Landers J, Salamon S, Wende H, Andronescu C, Schulz C, Wiggers H. Spray-Flame Synthesis of LaFe xCo 1-xO 3 ( x = 0.2, 0.3) Perovskite Nanoparticles for Oxygen Evolution Reaction in Water Splitting: Effect of Precursor Chemistry (Acetates and Nitrates). J Phys Chem A 2023; 127:2564-2576. [PMID: 36896577 DOI: 10.1021/acs.jpca.2c06601] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
The product properties of mixed oxide nanoparticles generated via spray-flame synthesis depend on an intricate interplay of solvent and precursor chemistries in the processed solution. The effect of two different sets of metal precursors, acetates and nitrates, dissolved in a mixture of ethanol (35 Vol.%) and 2-ethylhexanoic acid (2-EHA, 65 Vol.%) was investigated for the synthesis of LaFexCo1-xO3 (x = 0.2, 0.3) perovskites. Regardless of the set of precursors, similar particle-size distributions (dp = 8-11 nm) were obtained and a few particles with sizes above 20 nm were identified with transmission electron microscopy (TEM) measurements. Using acetates as precursors, inhomogeneous La, Fe, and Co elemental distributions were obtained for all particle sizes according to energy dispersive X-ray (EDX) mappings, connected to the formation of multiple secondary phases such as oxygen-deficient La3(FexCo1-x)3O8 brownmillerite or La4(FexCo1-x)3O10 Ruddlesden-Popper (RP) structures besides the main trigonal perovskite phase. For samples synthesized from nitrates, inhomogeneous elemental distributions were observed for large particles only where La and Fe enrichment occurred in combination with the formation of a secondary La2(FexCo1-x)O4 RP phase. Such variations can be attributed to reactions in the solution prior to injection in the flame as well as precursor-dependent variations in in-flame reactions. Therefore, the precursor solutions were analyzed by temperature-dependent attenuated total reflection Fourier-transform infrared (ATR-FTIR) measurements. The acetate-based precursor solutions indicated the partial conversion of, mainly La and Fe, acetates to metal 2-ethylhexanoates. In the nitrate-based solutions, esterification of ethanol and 2-EHA played the most important role. The synthesized nanoparticle samples were characterized by BET (Brunauer, Emmett, Teller), FTIR, Mössbauer, and X-ray photoelectron spectroscopy (XPS). All samples were tested as oxygen evolution reaction (OER) catalysts, and similar electrocatalytic activities were recorded when evaluating the potential required to reach 10 mA/cm2 current density (∼1.61 V vs reversible hydrogen electrode (RHE)).
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Affiliation(s)
- Steven Angel
- EMPI, Institute for Energy and Materials Processes - Reactive Fluids, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Michael Braun
- Chemical Technology III, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Baris Alkan
- Fritz-Haber-Institut der Max-Planck Gesellschaft, Departments of Physical Chemistry and Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
| | - Joachim Landers
- Experimental Physics, Faculty of Physics, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Soma Salamon
- Experimental Physics, Faculty of Physics, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Heiko Wende
- Experimental Physics, Faculty of Physics, University of Duisburg-Essen, 47048 Duisburg, Germany
- CENIDE, Center for Nanointegration, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Corina Andronescu
- Chemical Technology III, University of Duisburg-Essen, 47048 Duisburg, Germany
- CENIDE, Center for Nanointegration, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Christof Schulz
- EMPI, Institute for Energy and Materials Processes - Reactive Fluids, University of Duisburg-Essen, 47048 Duisburg, Germany
- CENIDE, Center for Nanointegration, University of Duisburg-Essen, 47048 Duisburg, Germany
| | - Hartmut Wiggers
- EMPI, Institute for Energy and Materials Processes - Reactive Fluids, University of Duisburg-Essen, 47048 Duisburg, Germany
- CENIDE, Center for Nanointegration, University of Duisburg-Essen, 47048 Duisburg, Germany
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5
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Zhao J, Tan H, Zi Z, Song L, Hu H, Zhang H, Wu M. Synchronous coupling of defects and a heteroatom-doped carbon constraint layer on cobalt sulfides toward boosted oxide electrolysis activities for highly energy-efficient micro-zinc-air batteries. NANOSCALE 2023; 15:5927-5937. [PMID: 36877572 DOI: 10.1039/d3nr00082f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The sluggish kinetics of oxygen electrocatalysis reactions on cathodes significantly suppresses the energy efficiency of zinc-air batteries (ZABs). Herein, by coupling in situ generated CoS nanoparticles rich in cobalt vacancies (VCo) with a dual-heteroatom-doped layered carbon framework, a hybrid Co-based catalyst (Co1-xS@N/S-C) is designed and synthesized from Co-MOF precursor. Experimental analyses, together with density functional theory (DFT)-based calculations, demonstrate that the facilitated ion diffusion enabled by the introduced VCo, together with the enhanced electron transport benefiting from the well-designed dual-heteroatom-doped laminated carbon framework, synergistically boost the bifunctional electrocatalytic activity of Co1-xS@N/S-C (ΔE = 0.76 V), which is much superior to that of CoS@N/S-C without VCo (ΔE = 0.89 V), CoS without VCo (ΔE = 1.23 V), and the dual-heteroatom-doped laminated carbon framework. As expected, the further assembled ZAB employing Co1-xS@N/S-C as the cathode electrocatalyst exhibits enhanced energy efficiency in terms of better cycling stability (510 cycles/170 hours) and a higher specific capacity (807 mA h g-1). Finally, a flexible/stretched solid state micro-ZAB (F/SmZAB) with Co1-xS@N/S-C as the cathode electrocatalyst and a wave-shaped GaIn-Ni-based liquid metal as the electronic circuit is further designed, which can display excellent electrical properties and long elongation. This work provides a new defect and structure coupling strategy for boosting the oxide electrolysis activities of Co-based catalysts. Furthermore, F/SmZAB represents a promising solution for a compatible micropower source in wearable microelectronics.
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Affiliation(s)
- Juanjuan Zhao
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Institute of Energy, Hefei Comprehensive National Science Center, Anhui University, Hefei 230601, China.
- School of Physics and Materials Engineering, Hefei Normal University, Hefei, 230601, China
| | - Hao Tan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - Zhenfa Zi
- School of Physics and Materials Engineering, Hefei Normal University, Hefei, 230601, China
| | - Li Song
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - Haibo Hu
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Institute of Energy, Hefei Comprehensive National Science Center, Anhui University, Hefei 230601, China.
| | - Haijun Zhang
- School of Safety Science and Engineering, Civil Aviation University of China, Tianjin, 300300, P. R. China.
| | - Mingzai Wu
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Institute of Energy, Hefei Comprehensive National Science Center, Anhui University, Hefei 230601, China.
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6
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Pham VN, Jeon H, Hong S, Lee H. Selective Oxidation of Biomass Molecules via ZnO Nanoparticles Modified Using Charge Mismatch of the Doped Co ions. Inorg Chem 2022; 61:16887-16894. [PMID: 36223637 DOI: 10.1021/acs.inorgchem.2c02934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A charge mismatch between transition-metal-ion dopants and metal oxide nanoparticles (MO NPs) within an engineered complex engenders a significant number of oxygen vacancies (VO) on the surface of the MO NP construct. To elucidate in-depth the mechanism of this tendency, Co ions with different charge states (Co3+ and Co2+) were doped into ZnO NPs, and their atomic structural changes were correlated with their photocatalytic efficiency. We ascertained that the increase of the Zn-O bond distances was distinctly affected by Co3+-ion doping, and, subsequently, the number of VO was noticeably increased. We further investigated the mechanistic pathways of the photocatalytic oxidation of 2,5-hydroxymethylfurfural (HMF), which have been widely investigated as biomass derivatives because of their potential use as precursors for the synthesis of sustainable alternatives to petrochemical substances. To identify the reaction products in each oxidation step, selective oxidation products obtained from HMF in the presence of pristine ZnO NPs, Co3+- and Co2+-ion-doped ZnO NPs were evaluated. We confirmed that Co3+-ion-doped ZnO NPs can efficiently and selectively oxidize HMF with a good conversion rate (∼40%) by converting HMF to 2,5-furandicarboxylic acid (FDCA). The present study demonstrates the feasibility of improving the production efficiency of FDCA (an alternative energy material) by using enhanced photocatalytic MO NPs with the help of the charge mismatch between MO and metal-ion dopants.
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Affiliation(s)
- Vy Ngoc Pham
- Department of Chemistry, Sookmyung Women's University, Seoul04310, Republic of Korea
| | - Hyeri Jeon
- Department of Chemistry, Sookmyung Women's University, Seoul04310, Republic of Korea
| | - Seungwoo Hong
- Department of Chemistry, Sookmyung Women's University, Seoul04310, Republic of Korea
| | - Hangil Lee
- Department of Chemistry, Sookmyung Women's University, Seoul04310, Republic of Korea
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7
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Anand K, Pal A, Alam M, Dan S, Kumar S, Ghosh S, Kumari S, Das A, Sawada M, Mohan A, Sathe VG, Chatterjee S. Emergence of metamagnetic transition, re-entrant cluster glass and spin phonon coupling in Tb 2CoMnO 6. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:275802. [PMID: 33957615 DOI: 10.1088/1361-648x/abfe94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
The double perovskite compound Tb2CoMnO6has been investigated using x-ray absorption spectroscopy (XAS), Raman spectroscopy, magnetic measurements andab initioband structure calculations. It is observed that both anti-ferromagnetic (AFM) and ferromagnetic (FM) phase coexist in this material. The presence of anti-site disorder (ASD) has been established from the analysis of neutron diffraction data. Moreover, a prominent metamagnetic transition is observed in theM(H) behavior that has been explained with the drastic reorientation of the pinned domain which are aligned antiparallel by the antiphase boundaries (APBs) at zero field. The ASD further gives rise to spin frustration at low temperature which leads to the re-entrant cluster glass ∼33 K. The coupling between phononic degree of freedom and spin in the system has also been demonstrated. It is observed that the theoretical calculation is consistent with that of the experimentally observed behavior.
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Affiliation(s)
- Khyati Anand
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Arkadeb Pal
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Mohd Alam
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Sambhab Dan
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Shiv Kumar
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi Hiroshima 739-0046, Japan
| | - Surajit Ghosh
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Seema Kumari
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - A Das
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Masahiro Sawada
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi Hiroshima 739-0046, Japan
| | - Anita Mohan
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
| | - Vasant G Sathe
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - Sandip Chatterjee
- Department of Physics, Indian Institute of Technology (BHU) Varanasi 221005, India
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8
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Zhu S, Li X, Jiao X, Shao W, Li L, Zu X, Hu J, Zhu J, Yan W, Wang C, Sun Y, Xie Y. Selective CO 2 Photoreduction into C 2 Product Enabled by Charge-Polarized Metal Pair Sites. NANO LETTERS 2021; 21:2324-2331. [PMID: 33646780 DOI: 10.1021/acs.nanolett.1c00383] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Selective CO2 photoreduction into a high-energy-density C2 product is still challenging. Here, charge-polarized metal pair sites are designed to trigger C-C coupling through manipulating asymmetric charge distribution on the reduction intermediates. Taking the synthetic partially reduced Co3O4 nanosheets as an example, theoretical calculations unveil the asymmetric charge distribution on surface cobalt sites. The formed charge-polarized cobalt pair sites not only donate electrons to CO2 molecules but also accelerate the coupling of asymmetric COOH* intermediates through lowering the energy barrier from 0.680 to 0.240 eV, affirmed by quasi in situ X-ray photoelectron spectroscopy and Gibbs free energy calculations. Also, the electron-rich cobalt sites strengthen their interaction with O of the HOOC-CH2O* intermediate, which favors the C-O bond cleavage and hence facilitates the rate-limiting CH3COOH desorption process. The partially reduced Co3O4 nanosheets achieve 92.5% selectivity of CH3COOH in simulated air, while the CO2-to-CH3COOH conversion ratio is 2.75%, obviously higher than that in pure CO2.
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Affiliation(s)
- Shan Zhu
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xiaodong Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xingchen Jiao
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Weiwei Shao
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Li Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xiaolong Zu
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Jun Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yongfu Sun
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, P. R. China
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9
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Lian Q, Roy A, Kizilkaya O, Gang DD, Holmes W, Zappi ME, Zhang X, Yao H. Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism. ACS APPLIED MATERIALS & INTERFACES 2020; 12:57190-57206. [PMID: 33291883 DOI: 10.1021/acsami.0c20341] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Amorphous cobalt-inherent silicon oxide (Co-SiOx) was synthesized for the first time and employed as a highly active catalyst in the activation of peroxymonosulfate (PMS) for the rapid oxidation of 2,4-dichlorophenol (2,4-DCP). The characterization results revealed that the 0.15Co-SiOx possessed a high specific surface area of 607.95 m2/g with a uniform mesoporous structure (24.33 nm). The X-ray diffraction patterns indicate that the substituted cobalt atoms enlarge the unit cell parameter of the original SiO2, and the selected area electron diffraction pattern confirmed the amorphous nature of Co-SiOx. More bulk oxygen vacancies (Ov) existing in the Co-SiOx were identified to be one of the primary contributors to the significantly enhanced catalytic activation of PMS. The cobalt substitution both creates and stabilizes the surficial Ov and forms the adequately active Co(II)-Ov pairs which engine the electron transfer process during the catalytic activities. The active Co(II)-Ov pairs weaken the average electronegativity of Co/Si and Co/O sites, resulting in the prevalent changes in final state energy, which is the main driving cause of the binding energy shifts in the X-ray photoelectron spectroscopy (XPS) spectra of Si and O among all samples. The increase of the relative proportion of Co(III) in the spent Co-SiOx probably causes the binding energy shifts of the Co XPS spectrum compared to that of the Co-SiOx. The amorphous Co-SiOx outperforms stable and quick 2,4-DCP degradation, achieving a much higher kinetic rate of 0.7139 min-1 at pH = 7.02 than others via sulfate radical advanced oxidation processes (AOPs), photo-Fenton AOPs, H2O2 reagent AOPs, and other AOP approaches. The efficient degradation performance makes the amorphous Co-SiOx as a promising catalyst in removing 2,4-DCP or organic-rich pollutants.
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Affiliation(s)
- Qiyu Lian
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
| | - Amitava Roy
- The J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD), Baton Rouge, Louisiana 70806, United States
| | - Orhan Kizilkaya
- The J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD), Baton Rouge, Louisiana 70806, United States
| | - Daniel Dianchen Gang
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
| | - William Holmes
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
- Department of Chemical Engineering, University of Louisiana at Lafayette, P.O. Box 43675, Lafayette, Louisiana 70504, United States
| | - Mark E Zappi
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
- Department of Chemical Engineering, University of Louisiana at Lafayette, P.O. Box 43675, Lafayette, Louisiana 70504, United States
| | - Xu Zhang
- Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, School of Civil Engineering, Beijing Jiaotong University, 3 Shangyuancun, Beijing 100044, P. R. China
| | - Hong Yao
- Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, School of Civil Engineering, Beijing Jiaotong University, 3 Shangyuancun, Beijing 100044, P. R. China
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10
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Shi Y, Xie R, Liu X, Zhang N, Aruta C, Yang N. Tunable pH-dependent oxygen evolution activity of strontium cobaltite thin films for electrochemical water splitting. Phys Chem Chem Phys 2019; 21:16230-16239. [PMID: 31298262 DOI: 10.1039/c9cp02278c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the oxygen evolution reaction (OER) dependence on the reaction environment pH is important to find alternative strategies to define an optimal pH value for high electrocatalytic activity. SrCoO2.5 films with the brownmillerite phase are investigated in this study for their strain effects on the OER activity, with particular regard to the pH dependence. Pulsed laser deposited films with different thicknesses and, thus, strain conditions, are characterized in terms of long range and near-order structural properties and electrochemical OER activity. By comparison, more strained thinner films have smaller OER current at lower pH conditions, but higher sensitivity to the environment pH. Spectroscopic measurements allow us to correlate such behaviors to the Co 3d-O 2p hybridization effects of the CoO6 octahedral sites, which lead to a variation of the 3d level electronic occupation. At the same time, density functional theory calculations show that the oxygen vacancy channels of the CoO4 tetrahedral sites are stable with respect to the strain effects. These results provide new perspectives to manipulate the pH dependent OER activity through the strain effects, useful for designing water splitting-based devices with optimized performances.
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Affiliation(s)
- Yanuo Shi
- Electrochemical Thin Film Group, School of Physical Science and Technology, ShanghaiTech University, Shanghai, P. R. China.
| | - Renjie Xie
- Electrochemical Thin Film Group, School of Physical Science and Technology, ShanghaiTech University, Shanghai, P. R. China.
| | - Xuetao Liu
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China and Xtalpi Inc, One Broadway, Ninth Floor, Cambridge, Massachusetts 02142, USA
| | - Nian Zhang
- Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Carmela Aruta
- CNR-SPIN, Università di Roma Tor Vergata, Via del Politecnico, 1, 00133 Roma, Italy.
| | - Nan Yang
- Electrochemical Thin Film Group, School of Physical Science and Technology, ShanghaiTech University, Shanghai, P. R. China.
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11
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Sartori K, Cotin G, Bouillet C, Halté V, Bégin-Colin S, Choueikani F, Pichon BP. Strong interfacial coupling through exchange interactions in soft/hard core-shell nanoparticles as a function of cationic distribution. NANOSCALE 2019; 11:12946-12958. [PMID: 31259329 DOI: 10.1039/c9nr02323b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Exchange coupled core-shell nanoparticles present high potential to tune adequately the magnetic properties for specific applications such as nanomedicine or spintronics. Here, we report on the design of core-shell nanoparticles by performing the successive thermal decomposition of Fe and Co complexes. Depending on the thermal stability and the concentration of the Co precursor, we were able to control the formation of a hard ferrimagnetic (FiM) Co-ferrite shell or an antiferromagnetic (AFM) CoO shell at the surface of a soft FiM Fe3-δO4 core. The formation of the Co-ferrite shell was also found to occur through two different mechanisms: the diffusion of Co or the growth at the iron oxide surface. The structural properties of core-shell nanoparticles were investigated by a wide panel of techniques such as HAADF, STEM and XRD. The distribution of Fe and Co elements in the crystal structure was described accurately by XAS and XMCD. The operating conditions influenced significantly the oxidation rate of Fe2+ in the core as well as the occupancy of Oh sites by Fe2+ and Co2+ cations. The structural properties of nanoparticles were correlated with their magnetic properties which were investigated by SQUID magnetometry. Each core-shell nanoparticle displayed enhanced effective magnetic anisotropy energy (Eeff) in comparison with pristine Fe3-δO4 nanoparticles because of magnetic coupling at the core-shell interface. The Co-ferrite FiM shells resulted in better enhancement of Eeff than a CoO AFM shell. In addition, the magnetic properties were also influenced by the core size. The coercive field (HC) was increased by core reduction while the blocking temperature (TB) was increased by a larger core. Element-specific XMCD measurements showed the fine coupling of Fe and Co cations which agree with Co-ferrite in each sample, e.g. the formation of a Co-doped interfacial layer in the Fe3-δO4@CoO nanoparticles.
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Affiliation(s)
- Kevin Sartori
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France. and Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin - BP48, 91192 Gif-sur-Yvette, France
| | - Geoffrey Cotin
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.
| | - Corinne Bouillet
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.
| | - Valérie Halté
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.
| | - Sylvie Bégin-Colin
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.
| | - Fadi Choueikani
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin - BP48, 91192 Gif-sur-Yvette, France
| | - Benoit P Pichon
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France. and Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
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12
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Masarrat A, Bhogra A, Meena R, Bala M, Singh R, Barwal V, Dong CL, Chen CL, Som T, Kumar A, Niazi A, Asokan K. Effect of Fe ion implantation on the thermoelectric properties and electronic structures of CoSb3 thin films. RSC Adv 2019; 9:36113-36122. [PMID: 35540568 PMCID: PMC9074955 DOI: 10.1039/c9ra06873b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/14/2019] [Indexed: 11/21/2022] Open
Abstract
In the present study, thin films of single-phase CoSb3 were deposited onto Si(100) substrates via pulsed laser deposition (PLD) method using a polycrystalline target of CoSb3. These films were implanted by 120 keV Fe-ions with three different fluences: 1 × 1015, 2.5 × 1015 and 5 × 1015 ions per cm2. All films were characterised by X-ray diffraction (XRD), Raman spectroscopy, atomic force microscopy (AFM), Rutherford backscattering (RBS) spectrometry and X-ray absorption spectroscopy (XAS). XRD data revealed that the ion implantation decreased the crystalline nature of these films, which are recovered after the rapid thermal annealing process. The Seebeck coefficient S vary with the fluences in the temperature range of 300 K to 420 K, and is found to be highest (i.e., 254 μV K−1) at 420 K for the film implanted with 1 × 1015 ions per cm2. The high S and low resistivity lead to the highest power factor for the film implanted with 1 × 1015 ions per cm2 (i.e., 700 μW m−1 K−2) at 420 K. The changing of the sign of S from negative for the pristine film to positive for the Fe-implanted samples confirm that the Fe ions are electrically active and act as electron acceptors by replacing the Co atoms. XAS measurements confirm that the Fe ions occupied the Co site in the cubic frame of the skutterudite and exist in the 3+ oxidation state in this structure. The power factor for the Fe ion-implanted samples is greater than that of the pristine sample with a value of 700 mW m−1 K−2 at 420 K for the I1E15A sample.![]()
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Affiliation(s)
- Anha Masarrat
- Inter University Accelerator Centre
- New Delhi-110067
- India
- Department of Physics
- Jamia Millia Islamia
| | | | | | - Manju Bala
- Department of Physics & Astrophysics
- University of Delhi
- New Delhi-110007
- India
| | | | - Vineet Barwal
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Chung-Li Dong
- Research Center for X-ray Science
- Department of Physics
- Tamkang University
- Taiwan
| | - Chi-Liang Chen
- National Synchrotron Radiation Research Centre
- Hsinchu
- Taiwan
| | - T. Som
- Institute of Physics
- Bhubaneswar-751005
- India
| | - Ashish Kumar
- Inter University Accelerator Centre
- New Delhi-110067
- India
| | - A. Niazi
- Department of Physics
- Jamia Millia Islamia
- New Delhi-110025
- India
| | - K. Asokan
- Inter University Accelerator Centre
- New Delhi-110067
- India
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13
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Identification of single-atom active sites in carbon-based cobalt catalysts during electrocatalytic hydrogen evolution. Nat Catal 2018. [DOI: 10.1038/s41929-018-0203-5] [Citation(s) in RCA: 438] [Impact Index Per Article: 73.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Assadi MHN, Katayama-Yoshida H. Magnetism and spin entropy in Ru doped Na 0.5CoO 2. Phys Chem Chem Phys 2017; 19:23425-23430. [PMID: 28828414 DOI: 10.1039/c7cp03752j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of Ru doping on the magnetic coupling among Co ions and on the Seebeck effect in Na0.5CoO2 was systematically studied using density functional theory. It was found that the Ru dopant takes the 4+ oxidation state and replaces a Co4+ ion. In addition, the remaining Co4+ ions in Na0.5CoO2:Ru were stabilized in a low spin state. Magnetically, the Ru dopants couple in a ferrimagnetic manner with Co ions in the host lattice. Due to the higher electronic degeneracy of Ru4+ dopants, the Seebeck coefficient in Na0.5CoO2 is predicted to be higher than that of the pristine compound.
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Affiliation(s)
- M H N Assadi
- Center for Computational Sciences, The University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
| | - H Katayama-Yoshida
- Center for Spintronics Research Network (CSRN), Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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15
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Ludwig J, Alarcón-Suesca C, Geprägs S, Nordlund D, Doeff MM, Orench IP, Nilges T. Direct synthesis and characterization of mixed-valent Li0.5−δCoPO4, a Li-deficient derivative of the Cmcm polymorph of LiCoPO4. RSC Adv 2017. [DOI: 10.1039/c7ra04043a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Li0.5−δCoPO4, the first Li-deficient, mixed-valent Co(ii,iii) derivative of Cmcm-LiCoPO4, exhibits a complex, multi-step thermal decomposition mechanism.
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Affiliation(s)
- Jennifer Ludwig
- Technical University of Munich
- Department of Chemistry
- Synthesis and Characterization of Innovative Materials
- 85747 Garching
- Germany
| | - Carlos Alarcón-Suesca
- Technical University of Munich
- Department of Chemistry
- Synthesis and Characterization of Innovative Materials
- 85747 Garching
- Germany
| | - Stephan Geprägs
- Walther Meissner Institute
- Bavarian Academy of Sciences and Humanities
- 85747 Garching
- Germany
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource
- SLAC National Accelerator Laboratory
- Menlo Park
- USA
| | - Marca M. Doeff
- Lawrence Berkeley National Laboratory
- Energy Storage and Distributed Resources Division
- Berkeley
- USA
| | - Inés Puente Orench
- Instituto de Ciencia de Materiales de Aragón
- 50009 Zaragoza
- Spain
- Institut Laue-Langevin
- 38042 Grenoble Cedex 9
| | - Tom Nilges
- Technical University of Munich
- Department of Chemistry
- Synthesis and Characterization of Innovative Materials
- 85747 Garching
- Germany
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16
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Cherkashinin G, Jaegermann W. Dissociative adsorption of H2O on LiCoO2 (00l) surfaces: Co reduction induced by electron transfer from intrinsic defects. J Chem Phys 2016; 144:184706. [DOI: 10.1063/1.4948610] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- G. Cherkashinin
- Institute of Materials Science, TU Darmstadt, Jovanka-Bontschits Str. 2, D-64287 Darmstadt, Germany
| | - W. Jaegermann
- Institute of Materials Science, TU Darmstadt, Jovanka-Bontschits Str. 2, D-64287 Darmstadt, Germany
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17
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Adach A, Daszkiewicz M. Experimental and theoretical studies on the structure and spectroscopic properties of Co(III) and Co(II) complexes with 2-aminopyrimidine. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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