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Ye C, Liu B, Li Q, Yu M, Liu Y, Tai Z, Pan Z, Qiu Y. Activating Inert Crystal Face via Facet-Dependent Quench-Engineering for Electrocatalytic Water Oxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309856. [PMID: 38100241 DOI: 10.1002/smll.202309856] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Indexed: 05/25/2024]
Abstract
Developing a facile strategy to activate the inert crystal face of an electrocatalyst is critical to full-facet utilization, yet still challenging. Herein, the electrocatalytic activity of the inert crystal face is activated by quenching Co3O4 cubes and hexagonal plates with different crystal faces in Fe(NO3)3 solution, and the regulation mechanism of facet-dependent quench-engineering is further revealed. Compared to the Co3O4 cube with exposed {100} facet, the Co3O4 hexagonal plate with exposed {111} facet is more responsive to quenching, accompanied by a rougher surface, richer defect, and more Fe doping. Theoretical calculations indicate that the {111} facet has a more open structure with lower defect formation energy and Fe doping energy, ensuring its electronic and coordination structure is easier to optimize. Therefore, quench-engineering largely increases the catalytic activity of {111) facet for oxygen evolution reaction by 13.2% (the overpotential at 10 mA cm-2 decreases from 380 to 330 mV), while {100} facet only increases by 7.6% (from 393 to 363 mV). The quenched Co3O4 hexagonal plate exhibits excellent electrocatalytic activity and stability in both zinc-air battery and water-splitting. The work reveals the influence mechanism of crystal face on quench-engineering and inspires the activation of the inert crystal face.
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Affiliation(s)
- Changchun Ye
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510000, China
- Jiangmen Laboratory of Carbon Science and Technology, Jiangmen, Guangdong, 529100, China
| | - Bo Liu
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Qian Li
- National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Minxing Yu
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Yajie Liu
- Jiangmen Laboratory of Carbon Science and Technology, Jiangmen, Guangdong, 529100, China
| | - Zhixing Tai
- Jiangmen Laboratory of Carbon Science and Technology, Jiangmen, Guangdong, 529100, China
| | - Zhenghui Pan
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Yongcai Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510000, China
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2
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Ma H, Xiaohui Lu, Luo X, Sun D, Wang G, Fu Y. Constructing core-shell structured Co 3O 4-MnWO 4 composite photoelectrode with superior PEC water purification performance. CHEMOSPHERE 2024; 354:141648. [PMID: 38479681 DOI: 10.1016/j.chemosphere.2024.141648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/25/2024]
Abstract
Semiconductor photoelectrocatalytic (PEC) technology is one of the most effective methods for removing organic pollutants from wastewater in advanced oxidation processes(AOPs). The selection of suitable semiconductor materials as photoanodes is a crucial factor for achieving superior PEC performance. Here, a core-shell structured Co3O4-MnWO4 architecture is created by enveloping MnWO4 nanoparticles onto the surface of Co3O4 nanowires through a two-step hydrothermal process. The optimized Co3O4-MnWO4-5 photoelectrode showed superior PEC degradation efficiency for KN-R (∼91.2% in 2 h) and durable stability (the accelerated lifetime reached ∼9100 s at a current density of 50 mA cm-2). Three actual wastewaters were also collected to verify the practical applicability of the photoelectrode.The energy consumption was measured at 4.48 kWhm-3, with a COD removal efficiency of 83% and a decolorization rate of 98%. These results demonstrate the excellent performance and promising application of the photoelectrode. The enhancement of PEC performance for the core-shell structured Co3O4-MnWO4 architecture can be attributed to the suitable energy band structure of the Co3O4-MnWO4 composite, higher OEP, larger electrochemical active surface area, accelerated transport of interface carriers, and lower charge transfer resistance. The energy band structure of the Co3O4-MnWO4 composite showed a strong redox ability to induce electrons/holes (e-/h+), which enhances the generation of intermediate active species (hydroxyl radical ·OH and superoxide radicals ·O2-). Therefore, the rationally designed core-shell structured Co3O4-MnWO4 architecture exhibited excellent practical applicability in the degradation of organic pollutants.
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Affiliation(s)
- Hongchao Ma
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China
| | - Xiaohui Lu
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China
| | - Xinya Luo
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China.
| | - Dedong Sun
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China
| | - Guowen Wang
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China
| | - Yinghuan Fu
- School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, PR China.
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Su R, Gao Y, Chen L, Chen Y, Li N, Liu W, Gao B, Li Q. Utilizing the oxygen-atom trapping effect of Co 3O 4 with oxygen vacancies to promote chlorite activation for water decontamination. Proc Natl Acad Sci U S A 2024; 121:e2319427121. [PMID: 38442175 PMCID: PMC10945781 DOI: 10.1073/pnas.2319427121] [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: 11/06/2023] [Accepted: 01/30/2024] [Indexed: 03/07/2024] Open
Abstract
Heterogeneous high-valent cobalt-oxo [≡Co(IV)=O] is a widely focused reactive species in oxidant activation; however, the relationship between the catalyst interfacial defects and ≡Co(IV)=O formation remains poorly understood. Herein, photoexcited oxygen vacancies (OVs) were introduced into Co3O4 (OV-Co3O4) by a UV-induced modification method to facilitate chlorite (ClO2-) activation. Density functional theory calculations indicate that OVs result in low-coordinated Co atom, which can directionally anchor chlorite under the oxygen-atom trapping effect. Chlorite first undergoes homolytic O-Cl cleavage and transfers the dissociated O atom to the low-coordinated Co atom to form reactive ≡Co(IV)=O with a higher spin state. The reactive ≡Co(IV)=O rapidly extracts one electron from ClO2- to form chlorine dioxide (ClO2), accompanied by the Co atom returning a lower spin state. As a result of the oxygen-atom trapping effect, the OV-Co3O4/chlorite system achieved a 3.5 times higher efficiency of sulfamethoxazole degradation (~0.1331 min-1) than the pristine Co3O4/chlorite system. Besides, the refiled OVs can be easily restored by re-exposure to UV light, indicating the sustainability of the oxygen atom trap. The OV-Co3O4 was further fabricated on a polyacrylonitrile membrane for back-end water purification, achieving continuous flow degradation of pollutants with low cobalt leakage. This work presents an enhancement strategy for constructing OV as an oxygen-atom trapping site in heterogeneous advanced oxidation processes and provides insight into modulating the formation of ≡Co(IV)=O via defect engineering.
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Affiliation(s)
- Ruidian Su
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong266237, People’s Republic of China
| | - Yixuan Gao
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing100871, People’s Republic of China
| | - Long Chen
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing100871, People’s Republic of China
| | - Yi Chen
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong266237, People’s Republic of China
| | - Nan Li
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong266042, People’s Republic of China
| | - Wen Liu
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing100871, People’s Republic of China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong266237, People’s Republic of China
| | - Qian Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong266237, People’s Republic of China
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4
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Thiruppathi KP, Majumder SB. Microwave-Assisted Hydrothermal Synthesis of {100} and {111} Faceted LiFeO 2 Truncated Octahedra: Investigations on Volatile Organic Compound Sensing Performance. Inorg Chem 2024; 63:4545-4556. [PMID: 38394687 DOI: 10.1021/acs.inorgchem.3c03714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
Growth of exposed crystal facets has received considerable attention because of their coordinatively unsaturated surface atoms and defect-related surface reactivities. Herein, LiFeO2 truncated octahedra exposed with 6 {100} facets and 8 {111} facets were prepared through a simple microwave-assisted hydrothermal method without using any additives, surfactants, and calcination processes. The detailed growth process revealed that the formation of LiFeO2 truncated octahedra occurred only at the optimized reaction temperature (180 °C), time (30 min), and reactant concentrations. The prepared LiFeO2 truncated octahedra showed excellent sensing responses toward aliphatic organic compounds compared to that against aromatic organic compounds and poor response to inorganic compounds. The response percentages of 150 ppm concentrations of acetone, ethanol, formaldehyde, and isopropyl alcohol are 81.84, 62.91, 62.68, and 69.41%, respectively, at a low operating temperature (100 °C). The presence of exposed facets with their coordinatively unsaturated Li/Fe surface atoms such as 5-fold {100}, 3-fold {111}, 3-fold {100}-{111}, 2-fold {111}-{111}, and 2-fold coordination with the O atom in the vertices facilitated more oxygen vacancies and led to improved surface reactivities as well as sensitivity.
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Affiliation(s)
- K Palani Thiruppathi
- Advanced Materials Synthesis and Processing Laboratory, Materials Science Centre & School of Nanoscience and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Subhasish Basu Majumder
- Advanced Materials Synthesis and Processing Laboratory, Materials Science Centre & School of Nanoscience and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Haase FT, Ortega E, Saddeler S, Schmidt FP, Cruz D, Scholten F, Rüscher M, Martini A, Jeon HS, Herzog A, Hejral U, Davis EM, Timoshenko J, Knop-Gericke A, Lunkenbein T, Schulz S, Bergmann A, Roldan Cuenya B. Role of Fe decoration on the oxygen evolving state of Co 3O 4 nanocatalysts. ENERGY & ENVIRONMENTAL SCIENCE 2024; 17:2046-2058. [PMID: 38449571 PMCID: PMC10913145 DOI: 10.1039/d3ee02809g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 01/29/2024] [Indexed: 03/08/2024]
Abstract
The production of green hydrogen through alkaline water electrolysis is the key technology for the future carbon-neutral industry. Nanocrystalline Co3O4 catalysts are highly promising electrocatalysts for the oxygen evolution reaction and their activity strongly benefits from Fe surface decoration. However, limited knowledge of decisive catalyst motifs at the atomic level during oxygen evolution prevents their knowledge-driven optimization. Here, we employ a variety of operando spectroscopic methods to unveil how Fe decoration increases the catalytic activity of Co3O4 nanocatalysts as well as steer the (near-surface) active state formation. Our study shows a link of the termination-dependent Fe decoration to the activity enhancement and a significantly stronger Co3O4 near-surface (structural) adaptation under the reaction conditions. The near-surface Fe- and Co-O species accumulate an oxidative charge and undergo a reversible bond contraction during the catalytic process. Moreover, our work demonstrates the importance of low coordination surface sites on the Co3O4 host to ensure an efficient Fe-induced activity enhancement, providing another puzzle piece to facilitate optimized catalyst design.
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Affiliation(s)
- Felix T Haase
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Eduardo Ortega
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Sascha Saddeler
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen [CENIDE], University of Duisburg-Essen Essen Germany
| | - Franz-Philipp Schmidt
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Daniel Cruz
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Fabian Scholten
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Martina Rüscher
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Andrea Martini
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Hyo Sang Jeon
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Antonia Herzog
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Uta Hejral
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Earl M Davis
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Janis Timoshenko
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Axel Knop-Gericke
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36 45470 Mülheim Germany
| | - Thomas Lunkenbein
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Stephan Schulz
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen [CENIDE], University of Duisburg-Essen Essen Germany
| | - Arno Bergmann
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society Berlin Germany
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6
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Jia L, Liu Z, Hao H, Zhang M, Tian X, Huang W. Crystal Plane Engineering to Boost Water Cluster Evaporation for Enhanced Solar Steam Generation. NANO LETTERS 2024; 24:1753-1760. [PMID: 38287247 DOI: 10.1021/acs.nanolett.3c04646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Polymer based low evaporation enthalpy materials have become a universal selection for improving the efficiency of solar steam generation. Although water cluster and intermediate water mechanisms have been proposed to explain the low evaporation enthalpy, the production process and microstructure of activated water are still unclear. Here, crystal plane engineering is used to investigate the intermediate water state and the water cluster activation mechanism. The unique open-closed coordination structure on the optimized crystal surface promotes the generation of firm water clusters by optimizing the intermediate water state. Under the similar solar energy absorption of all materials, crystal plane engineering increased the solar steam generation rate of the evaporator by 31.2% and increased the energy efficiency to 94.8%. Exploring the micro-evaporation process and activated water structure is expected to stimulate the development of the next generation low evaporation enthalpy materials.
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Affiliation(s)
- Linhui Jia
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
| | - Zhongxin Liu
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
| | - Hongxun Hao
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
| | - Mingxin Zhang
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
| | - Xinlong Tian
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
| | - Wei Huang
- School of Marine Science and Engineering, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
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7
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Feygenson M, Huang Z, Xiao Y, Teng X, Lohstroh W, Nandakumaran N, Neuefeind JC, Everett M, Podlesnyak AA, Salazar-Alvarez G, Ulusoy S, Valvo M, Su Y, Ehlert S, Qdemat A, Ganeva M, Zhang L, Aronson MC. Probing spin waves in Co 3O 4 nanoparticles for magnonics applications. NANOSCALE 2024; 16:1291-1303. [PMID: 38131194 DOI: 10.1039/d3nr04424f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
The magnetic properties of spinel nanoparticles can be controlled by synthesizing particles of a specific shape and size. The synthesized nanorods, nanodots and cubic nanoparticles have different crystal planes selectively exposed on the surface. The surface effects on the static magnetic properties are well documented, while their influence on spin waves dispersion is still being debated. Our ability to manipulate spin waves using surface and defect engineering in magnetic nanoparticles is the key to designing magnonic devices. We synthesized cubic and spherical nanoparticles of a classical antiferromagnetic material Co3O4 to study the shape and size effects on their static and dynamic magnetic proprieties. Using a combination of experimental methods, we probed the magnetic and crystal structures of our samples and directly measured spin wave dispersions using inelastic neutron scattering. We found a weak, but unquestionable, increase in exchange interactions for the cubic nanoparticles as compared to spherical nanoparticle and bulk powder reference samples. Interestingly, the exchange interactions in spherical nanoparticles have bulk-like properties, despite a ferromagnetic contribution from canted surface spins.
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Affiliation(s)
- Mikhail Feygenson
- European Spallation Source ERIC, SE-221 00 Lund, Sweden.
- Jülich Centre for Neutron Science (JCNS-1) at Forschungszentrum Jülich, D-52425 Jülich, Germany
- Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03, Uppsala, Sweden
| | - Zhongyuan Huang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Yinguo Xiao
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiaowei Teng
- Worcester Polytechnic Institute, Department of Chemical Engineering, Worcester 01609, USA
| | - Wiebke Lohstroh
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 8574 Garching, Germany
| | - Nileena Nandakumaran
- Jülich Centre for Neutron Science (JCNS-2) and Peter Grünberg Institute (PGI-4), Jülich GmbH, 52425, Jülich, Germany
| | - Jörg C Neuefeind
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Michelle Everett
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Andrey A Podlesnyak
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Germán Salazar-Alvarez
- Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03, Uppsala, Sweden
| | - Seda Ulusoy
- Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03, Uppsala, Sweden
| | - Mario Valvo
- Department of Chemistry, Uppsala University, 75121 Uppsala, Sweden
| | - Yixi Su
- Jülich Centre for Neutron Science (JCNS-4) at Heinz Maier-Leibnitz-Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - Sascha Ehlert
- Jülich Centre for Neutron Science (JCNS-1) at Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Asma Qdemat
- Jülich Centre for Neutron Science (JCNS-2) and Peter Grünberg Institute (PGI-4), Jülich GmbH, 52425, Jülich, Germany
| | - Marina Ganeva
- Jülich Centre for Neutron Science (JCNS-4) at Heinz Maier-Leibnitz-Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - Lihua Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - Meigan C Aronson
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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8
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Mykhailovych V, Caruntu G, Graur A, Mykhailovych M, Fochuk P, Fodchuk I, Rotaru GM, Rotaru A. Fabrication and Characterization of Dielectric ZnCr 2O 4 Nanopowders and Thin Films for Parallel-Plate Capacitor Applications. MICROMACHINES 2023; 14:1759. [PMID: 37763922 PMCID: PMC10534308 DOI: 10.3390/mi14091759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/04/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023]
Abstract
We report here the successful shape-controlled synthesis of dielectric spinel-type ZnCr2O4 nanoparticles by using a simple sol-gel auto-combustion method followed by successive heat treatment steps of the resulting powders at temperatures from 500 to 900 °C and from 5 to 11 h, in air. A systematic study of the dependence of the morphology of the nanoparticles on the annealing time and temperature was performed by using field effect scanning electron microscopy (FE-SEM), powder X-ray diffraction (PXRD) and structure refinement by the Rietveld method, dynamic lattice analysis and broadband dielectric spectrometry, respectively. It was observed for the first time that when the aerobic post-synthesis heat treatment temperature increases progressively from 500 to 900 °C, the ZnCr2O4 nanoparticles: (i) increase in size from 10 to 350 nm and (ii) develop well-defined facets, changing their shape from shapeless to truncated octahedrons and eventually pseudo-octahedra. The samples were found to exhibit high dielectric constant values and low dielectric losses with the best dielectric performance characteristics displayed by the 350 nm pseudo-octahedral nanoparticles whose permittivity reaches a value of ε = 1500 and a dielectric loss tan δ = 5 × 10-4 at a frequency of 1 Hz. Nanoparticulate ZnCr2O4-based thin films with a thickness varying from 0.5 to 2 μm were fabricated by the drop-casting method and subsequently incorporated into planar capacitors whose dielectric performance was characterized. This study undoubtedly shows that the dielectric properties of nanostructured zinc chromite powders can be engineered by the rational control of their morphology upon the variation of the post-synthesis heat treatment process.
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Affiliation(s)
- Vasyl Mykhailovych
- Department of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University of Suceava, 13, University St., No. 13, 720229 Suceava, Romania
- Department of General Chemistry and Material Science, Yuriy Fedkovych Chernivtsi National University, 2, Kotsjubynskyi St., 58012 Chernivtsi, Ukraine
- Physical, Technical and Computer Science Institute, Yuriy Fedkovych Chernivtsi National University, 2, Kotsjubynskyi St., 58012 Chernivtsi, Ukraine
| | - Gabriel Caruntu
- Department of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University of Suceava, 13, University St., No. 13, 720229 Suceava, Romania
- Department of Chemistry and Biochemistry, Central Michigan University, 1200 S. Franklin St., Mount Pleasant, MI 48859, USA
- Science of Advanced Materials Program, Central Michigan University, 1200 S. Franklin St., Mount Pleasant, MI 48859, USA
| | - Adrian Graur
- Department of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University of Suceava, 13, University St., No. 13, 720229 Suceava, Romania
| | - Mariia Mykhailovych
- Department of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University of Suceava, 13, University St., No. 13, 720229 Suceava, Romania
- Department of General Chemistry and Material Science, Yuriy Fedkovych Chernivtsi National University, 2, Kotsjubynskyi St., 58012 Chernivtsi, Ukraine
| | - Petro Fochuk
- Department of General Chemistry and Material Science, Yuriy Fedkovych Chernivtsi National University, 2, Kotsjubynskyi St., 58012 Chernivtsi, Ukraine
| | - Igor Fodchuk
- Physical, Technical and Computer Science Institute, Yuriy Fedkovych Chernivtsi National University, 2, Kotsjubynskyi St., 58012 Chernivtsi, Ukraine
| | - Gelu-Marius Rotaru
- Faculty of Mechanical Engineering Mechatronics and Management & Research Center MANSiD, Stefan cel Mare University, 720229 Suceava, Romania
| | - Aurelian Rotaru
- Department of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University of Suceava, 13, University St., No. 13, 720229 Suceava, Romania
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9
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Liu Y, Lu B, Ning H, Zhang L, Luo Q, Ban H, Mao S. Oxygen Vacancy Promoted O 2 Activation over Mesoporous Ni-Co Mixed Oxides for Aromatic Hydrocarbon Oxidation. Inorg Chem 2023; 62:3195-3201. [PMID: 36760173 DOI: 10.1021/acs.inorgchem.2c04150] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Whether the oxygen vacancies of heterogeneous catalysts improve their catalytic activity or not has recently been the topic of intense debate in the oxidation of hydrocarbons. We designed an effective strategy to construct mesoporous Ni-Co mixed oxides via a ligand-assisted self-assembly approach. The surface oxygen vacancy concentrations of the mesoporous Ni-Co mixed oxide catalysts were regulated by changing the doping amount of Ni or the reduction method, and the relationship between oxygen vacancies and catalytic activity was studied. Controlled experiments and DFT calculations revealed that oxygen molecules were more favorably adsorbed and activated on oxygen vacancies to form active oxygen species. Increasing the oxygen vacancy concentration within a certain range can effectively enrich the active oxygen species, therefore improving the oxidation rate of ethylbenzene. The optimized mCo3O4-0.1NiO catalyst exhibited a remarkable catalytic activity for the solvent-free oxidation of ethylbenzene to acetophenone, typically including 68.0% conversion and 95.4% selectivity (20 mg mCo3O4-0.1NiO, 10 mL ethylbenzene, and 0.6 MPa O2).
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Affiliation(s)
- Yali Liu
- Department of Chemical Engineering, School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China
| | - Bing Lu
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
| | - Honghui Ning
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
| | - Liwei Zhang
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
| | - Qian Luo
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
| | - Heng Ban
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
| | - Shanjun Mao
- Advanced Materials and Catalysis Group, State Key Laboratory of Clean Energy Utilization, Center of Chemistry for Frontier Technologies, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China
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10
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Construction of Z-scheme MnCo2O4/Sn3O4 heterostructured photoanodes with enhanced photoelectrocatalytic degradation of reactive brilliant blue KN-R. INT J ELECTROCHEM SC 2023. [DOI: 10.1016/j.ijoes.2023.100066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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11
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Hu C, Dai P, Chen Z, Zhang H. Property and Reactivity Relationships of Co 3O 4 with Diverse Nanostructures for Soot Oxidation. ACS OMEGA 2022; 7:44116-44123. [PMID: 36506158 PMCID: PMC9730455 DOI: 10.1021/acsomega.2c05550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Cobalt oxide (Co3O4) nanostructures with different morphologies (nanocubes, nanoplates, and nanoflowers) were synthesized by a simple hydrothermal method and used for catalytic oxidation of soot particles. Through the study of the physicochemical properties of the catalysts, the key factors affecting the performance of soot oxidation were investigated. The results showed that all three kinds of Co3O4 nanocrystals exhibited excellent low-temperature activity in catalytic oxidation of soot, and the Co3O4 nanoflowers showed higher oxidation activity of soot compared with Co3O4 nanocubes and Co3O4 nanoplates, whose T m was only 370 °C. The excellent activity of Co3O4 nanoflowers was due to the large amount of Co3+ and lattice oxygen on their surface and highly defective structure, which promoted the adsorption and activation of oxygen species. The large crystallite size and few surface defects were the main reasons for the poor catalytic performance of Co3O4 nanocubes. During soot oxidation, the crystallite size of the catalysts and the contact between the catalysts and soot played a significant role in the catalytic performance.
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Affiliation(s)
- Chao Hu
- Anhui
Advanced Technology Research Institute of Green Building, Department
of Building Environment and Thermal Engineering, School of Environment
and Energy Engineering, Anhui Jianzhu University, Ziyun Road 292, Hefei230601, China
| | - PengCheng Dai
- Anhui
Advanced Technology Research Institute of Green Building, Department
of Building Environment and Thermal Engineering, School of Environment
and Energy Engineering, Anhui Jianzhu University, Ziyun Road 292, Hefei230601, China
| | - Zhenzhen Chen
- Anhui
Advanced Technology Research Institute of Green Building, Department
of Building Environment and Thermal Engineering, School of Environment
and Energy Engineering, Anhui Jianzhu University, Ziyun Road 292, Hefei230601, China
| | - Haitao Zhang
- Anhui
Special Equipment Inspection Institute, Dalian Road 45, Hefei230601, China
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12
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Insights into the Redox and Structural Properties of CoOx and MnOx: Fundamental Factors Affecting the Catalytic Performance in the Oxidation Process of VOCs. Catalysts 2022. [DOI: 10.3390/catal12101134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Volatile organic compound (VOC) abatement has become imperative nowadays due to their harmful effect on human health and on the environment. Catalytic oxidation has appeared as an innovative and promising approach, as the pollutants can be totally oxidized at moderate operating temperatures under 500 °C. The most active single oxides in the total oxidation of hydrocarbons have been shown to be manganese and cobalt oxides. The main factors affecting the catalytic performances of several metal-oxide catalysts, including CoOx and MnOx, in relation to the total oxidation of hydrocarbons have been reviewed. The influence of these factors is directly related to the Mars–van Krevelen mechanism, which is known to be applied in the case of the oxidation of VOCs in general and hydrocarbons in particular, using transitional metal oxides as catalysts. The catalytic behaviors of the studied oxides could be closely related to their redox properties, their nonstoichiometric, defective structure, and their lattice oxygen mobility. The control of the structural and textural properties of the studied metal oxides, such as specific surface area and specific morphology, plays an important role in catalytic applications. A fundamental challenge in the development of efficient and low-cost catalysts is to choose the criteria for selecting them. Therefore, this research could be useful for tailoring advanced and high-performance catalysts for the total oxidation of VOCs.
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13
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Xu K, Gao J, Chen P, Zhan C, Yang Y, Wang Z, Yang Y, Yang L, Yuan C. Interface Engineering of Fe 2O 3@Co 3O 4 Nanocubes for Enhanced Triethylamine Sensing Performance. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keng Xu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, P. R. China
| | - Jiyun Gao
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
- College of Chemistry and Environment, Yunnan Min Zu University, Kunming 650500, China
| | - Panfeng Chen
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, P. R. China
| | - Chenyong Zhan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, P. R. China
| | - Yanxing Yang
- Physics Department, New Jersey Institute of Technology, Newark, New Jersey 07102-1982 United States
| | - Zhipeng Wang
- Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, Jiangxi Province, China
| | - Yong Yang
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, P. R. China
| | - Li Yang
- Physics Department, New Jersey Institute of Technology, Newark, New Jersey 07102-1982 United States
| | - Cailei Yuan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, P. R. China
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14
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Wang H, Ren X, Liu Z, Lv B. Chemical conversion based on the crystal facet effect of transition metal oxides and construction methods for sharp-faced nanocrystals. Chem Commun (Camb) 2022; 58:908-924. [PMID: 34981109 DOI: 10.1039/d1cc06721d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In-depth research has found that the nanocrystal facet of transition metal oxides (TMOs) greatly affects their heterogeneous catalytic performance, as well as the property of photocatalysis, gas sensing, electrochemical reaction, etc. that are all involved in chemical conversion processes. Therefore, the facet-dependent properties of TMO nanocrystals have been fully and carefully studied by combining systematic experiments and theoretical calculations, and mechanisms of chemical reactions are accurately explained at the molecular level, which will be closer to the essence of reactions. Evidently, as an accurate investigation on crystal facets, well-defined TMO nanocrystals are the basis and premise for obtaining relevant credible results, and shape-controlled synthesis of TMO nanocrystals thereby has received great attention and development. The success in understanding of facet-dependent properties and shape-controlled synthesis of TMO nanocrystals is highly valuable for the control of reaction and the design of high-efficiency TMO nanocrystal catalysts as well as other functional materials in practical applications.
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Affiliation(s)
- Huixiang Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.
| | - Xiaobo Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.
| | - Zhong Liu
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China. .,Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, 810008, China
| | - Baoliang Lv
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.
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15
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Zhou L, Cao S, Zhang L, Xiang G, Zeng X, Chu G, Chen J. Quantitatively evaluating activity and number of catalytic sites on metal oxide for ammonium perchlorate decomposition. AIChE J 2022. [DOI: 10.1002/aic.17582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lin‐Yu Zhou
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
| | - Shao‐Bo Cao
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
| | - Liang‐Liang Zhang
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
| | - Guolei Xiang
- State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing People's Republic of China
| | - Xiao‐Fei Zeng
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
| | - Guang‐Wen Chu
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
| | - Jian‐Feng Chen
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology Beijing People's Republic of China
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16
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Ngnintedem Yonti C, Kenfack Tsobnang P, Lontio Fomekong R, Devred F, Mignolet E, Larondelle Y, Hermans S, Delcorte A, Lambi Ngolui J. Green Synthesis of Iron-Doped Cobalt Oxide Nanoparticles from Palm Kernel Oil via Co-Precipitation and Structural Characterization. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2833. [PMID: 34835601 PMCID: PMC8617965 DOI: 10.3390/nano11112833] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/11/2021] [Accepted: 10/18/2021] [Indexed: 11/16/2022]
Abstract
In this study, a bio-derived precipitating agent/ligand, palm kernel oil, has been used as an alternative route for the green synthesis of nanoparticles of Fe-doped Co3O4 via the co-precipitation reaction. The palm oil was extracted from dried palm kernel seeds by crushing, squeezing and filtration. The reaction of the palm kernel oil with potassium hydroxide, under reflux, yielded a solution containing a mixture of potassium carboxylate and excess hydroxide ions, irrespective of the length of saponification. The as-obtained solution reacts with an aqueous solution containing iron and cobalt ions to yield the desired metallo-organic precursor, iron cobalt carboxylate. Characterization of the precursors by IR and gas chromatography (GC) attests to the presence of carboxylate fatty acids in good agreement with the proportion contained in the oil, and ICP confirms that the metallic ratios are in the proportion used during the synthesis. Analysis of the products thermally decomposed between 400 °C and 600 °C by XRD, EDX, TEM and ToF-SIMS, established that cobalt iron oxide nanoparticles (Co(1-x)Fex)3O4 were obtained for x ≤ 0.2 and a nanocomposite material (Co(1-x)Fex)3O4/Fe3O4 for x ≥ 0.2, with sizes between 22 and 9 nm. ToF-SIMS and XRD provided direct evidence of the progressive substitution of cobalt by iron in the Co3O4 crystal structure for x ≤ 0.2.
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Affiliation(s)
- Cedrik Ngnintedem Yonti
- Inorganic Chemistry Department, University of Yaoundé I, Yaoundé 812, Cameroon;
- Institute of Condensed Matter and Nanosciences, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (F.D.); (S.H.); (A.D.)
| | | | - Roussin Lontio Fomekong
- Chemistry Department, Higher Teacher Training College, University of Yaoundé I, Yaoundé 47, Cameroon;
| | - Francois Devred
- Institute of Condensed Matter and Nanosciences, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (F.D.); (S.H.); (A.D.)
| | - Eric Mignolet
- Louvain Institute of Biomolecular Science and Technology, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (E.M.); (Y.L.)
| | - Yvan Larondelle
- Louvain Institute of Biomolecular Science and Technology, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (E.M.); (Y.L.)
| | - Sophie Hermans
- Institute of Condensed Matter and Nanosciences, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (F.D.); (S.H.); (A.D.)
| | - Arnaud Delcorte
- Institute of Condensed Matter and Nanosciences, Catholic University of Louvain, Croix du Sud, B-1348 Louvain-la-Neuve, Belgium; (F.D.); (S.H.); (A.D.)
| | - John Lambi Ngolui
- Chemistry Department, Higher Teacher Training College, University of Yaoundé I, Yaoundé 47, Cameroon;
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17
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Bae J, Shin D, Jeong H, Choe C, Choi Y, Han JW, Lee H. Facet-Dependent Mn Doping on Shaped Co 3O 4 Crystals for Catalytic Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01666] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Junemin Bae
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Dongjae Shin
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Hojin Jeong
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Chanyeong Choe
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Yunji Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
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18
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Chen L, Li T, Zhang J, Wang J, Chen P, Fu M, Wu J, Ye D. Chemisorbed Superoxide Species Enhanced the High Catalytic Performance of Ag/Co 3O 4 Nanocubes for Soot Oxidation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:21436-21449. [PMID: 33929836 DOI: 10.1021/acsami.1c03935] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The respective action mode between surface-adsorbed oxygen and bulk lattice oxygen during catalytic soot oxidation is still not fully recognized. Herein, a series of Ag-loaded Co3O4 catalysts with different Ag loading amounts were prepared by the impregnation method, and 5% Ag/Co3O4 presented competitive catalytic activity toward soot combustion with a T50 below 290 °C in 10% O2/N2. This remarkable improvement in catalytic performance could be primarily attributed to the enhanced Ag-Co3O4 metal-support interaction induced by the formation of uniform, dispersive, and suitable size metallic Ag nanoparticles. The activation, activity, consumption-regeneration, identification, and reaction of surface-adsorbed oxygen along with the activity of bulk lattice oxygen were characterized by various designed and in situ techniques. The results demonstrated that the chemisorbed superoxide species (O2-) play the potentially responsible role for boosting soot combustion, while the bulk lattice oxygen is much less active within the tested temperatures, inducing a negligible activity contribution. Moreover, soot-temperature programmed reduction, isothermal kinetic study, and density functional theory calculation provided supplementary support for the enhancement effect of Ag-Co3O4 combination in the activation and utilization of surface-adsorbed oxygen. The overall objective of this work is to identify the role of surface-adsorbed oxygen and bulk lattice oxygen for soot oxidation over Ag/Co3O4 catalysts.
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Affiliation(s)
- Longwen Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Tan Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
| | - Jun Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Jing Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Peirong Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Junliang Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510640, China
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou 510640, China
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19
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Zhi J, Zhou M, Zhang Z, Reiser O, Huang F. Interstitial boron-doped mesoporous semiconductor oxides for ultratransparent energy storage. Nat Commun 2021; 12:445. [PMID: 33469003 PMCID: PMC7815797 DOI: 10.1038/s41467-020-20352-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 11/27/2020] [Indexed: 01/29/2023] Open
Abstract
Realizing transparent and energy-dense supercapacitor is highly challenging, as there is a trade-off between energy storing capability and transparency in the active material film. We report here that interstitial boron-doped mesoporous semiconductor oxide shows exceptional electrochemical capacitance which rivals other pseudocapacitive materials, while maintaining its transparent characteristic. This improvement is credited to the robust redox reactions at interstitial boron-associated defects that transform inert semiconductor oxides into an electrochemically active material without affecting its transparency. By precisely tuning the level of doping, the pseudocapacitive reactivity of these materials is optimized, resulting in a volumetric capacitance up to 1172 F cm-3. Attributing to such efficient charge storage utilization on the active film, the fabricated transparent supercapacitor delivers a maximum areal energy density of 1.36 × 10-3 mWh cm-2 that is close to those of conventional pseudocapacitive materials, with nearly 100% capacitance retention after 15000 cycles and ultrahigh transparency (up to 85% transmittance at 550 nm). In addition, this device shows excellent durability and flexibility with multiple optional outputs, demonstrating the potential as a transparent energy supply in planar electronics.
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Affiliation(s)
- Jian Zhi
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg, Germany
| | - Min Zhou
- Hefei National Laboratory for Physical Science at the Microscale, Department of Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, P. R. China
| | - Zhen Zhang
- SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), South China Normal University, Guangzhou, China
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg, Germany
| | - Fuqiang Huang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China.
- Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China.
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20
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Zhao W, Li J, She T, Ma S, Cheng Z, Wang G, Zhao P, Wei W, Xia D, Leung DYC. Study on the Photocatalysis Mechanism of the Z-Scheme Cobalt Oxide Nanocubes/Carbon Nitride Nanosheets Heterojunction Photocatalyst with High Photocatalytic Performances. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123839. [PMID: 33254816 DOI: 10.1016/j.jhazmat.2020.123839] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 08/15/2020] [Accepted: 08/28/2020] [Indexed: 06/12/2023]
Abstract
An efficient Z-scheme Co3O4/g-C3N4 heterojunction photocatalyst was developed via in-situ forming Co3O4 nanocubes on the g-C3N4 nanosheet in the hydrothermal process. The obtained photocatalyst exhibited high photocatalytic activity for the visible-light-driven catalytic reduction of Cr(VI) and catalytic oxidation of tetracycline (TC). Among the as-synthesized catalysts, Co3O4/g-C3N4-0.04 (the mass ratio of g-C3N4 to Co3O4 is 0.04) sample exhibits the most efficient catalytic activities. The photocatalytic reduction and photocatalytic oxidation efficiencies of Co3O4/g-C3N4-0.04 can obtain 81.3 and 92.6 %, respectively. Moreover, the TC is mineralized in the course of photocatalytic degradation, 72.2% of TOC is removed from the reaction system. In addition, the apparent quantum efficiency for the removal of Cr(VI) was also obtained and the the Co3O4/g-C3N4-0.04 could achieve the highest apparent quantum efficiency among the samples. The enhancing photocatalytic activities originated from the efficient interfacial charge migration and separation obtained in Co3O4/g-C3N4-0.04, which is preliminarily confirmed by the photoluminescence spectra, time-resolved photoluminescence spectra and the photoelectrochemical characterizations. Finally, we speculate that the Co3O4/g-C3N4 heterostructures follow a more reasonable Z-scheme charge transfer in this study, which is confirmed by analyzing the results of electron paramagnetic resonance, radical scavenging experiments, and theoretical calculations.
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Affiliation(s)
- Wei Zhao
- School of Geography, School of Environment, Nanjing Normal University, Nanjing, China; Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China; School of Materials Engineering, Changshu Institute of Technology, Changshu, China
| | - Jing Li
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Tiantian She
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Sisi Ma
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Zhipeng Cheng
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Guoxiang Wang
- School of Geography, School of Environment, Nanjing Normal University, Nanjing, China.
| | - Pusu Zhao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, China
| | - Wei Wei
- School of Geography, School of Environment, Nanjing Normal University, Nanjing, China
| | - Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-Sen University, China.
| | - Dennis Y C Leung
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
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21
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Tang X, Wang J, Ma Y, Li J, Zhang X, Liu B. Low-temperature and stable CO oxidation of Co3O4/TiO2 monolithic catalysts. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Zhang Z, Ke X, Zhang B, Deng J, Liu Y, Liu W, Dai H, Chen FR, Sui M. Facet-Dependent Cobalt Ion Distribution on the Co 3O 4 Nanocatalyst Surface. J Phys Chem Lett 2020; 11:9913-9919. [PMID: 33170697 DOI: 10.1021/acs.jpclett.0c02901] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Co3O4 is an important catalyst widely used for CO oxidation or electrochemical water oxidation near room temperature and was also recently used as support for single-atom catalysts (SACs). Co3O4 with a spinel structure hosts dual oxidation states of Co2+ and Co3+ in the lattice, leading to the complexity of its surface structure as the exposure of Co2+ and Co3+ has a significant impact on the performance of the catalysts. Although it is acknowledged that different facets exhibit varied catalytic activities and different abilities in hosting single atoms to provide active centers in SACs, the Co3O4 surface structure remains under-investigated. In this study, major facets of {111}, {110}, and {100} were studied down to subangstrom scale using advanced electron microscopy. We noticed that each facet has its own most stable surface configuration. The distribution of Co2+ and Co3+ on each facet was quantified, revealing a facet-dependent distribution of Co2+ and Co3+. Co3+ was found to be preferentially exposed on {100} and {110} as well as surface steps. Surface reconstruction was revealed, where a subangstrom scale shift of Co2+ was confirmed on facets of {111} and {100} due to polarity compensation and oxygen deficiency on the surface. This work not only improves our fundamental understanding of the Co3O4 surface structure but also may promote the design of Co3O4-based catalysts with tunable activity and stability.
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Affiliation(s)
- Zhenhua Zhang
- College of Materials and Environmental Engineering, Institute for Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou 310018, China
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Xiaoxing Ke
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Bin Zhang
- Analytical and Testing Center, Chongqing University, Chongqing 401331, China
| | - Jiguang Deng
- Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
| | - Yuxi Liu
- Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
| | - Weiwei Liu
- College of Materials and Environmental Engineering, Institute for Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Hongxing Dai
- Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
| | - Fu-Rong Chen
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
| | - Manling Sui
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
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23
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Controllable Fabrication of Co3−xMnxO4 with Tunable External Co3+/Co2+ Ratio for Promoted Oxygen Reduction Reaction. Catal Letters 2020. [DOI: 10.1007/s10562-020-03381-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Tang X, Wang J, Ma Y, Li J, Zhang X, La P, Liu B. Flexible Co
3
O
4
/TiO
2
monolithic catalysts for low‐temperature and long‐term stable CO oxidation. NANO SELECT 2020. [DOI: 10.1002/nano.202000112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Xinyue Tang
- Shenyang National Laboratory for Materials Science (SYNL) Institute of Metal Research (IMR) Chinese Academy of Sciences (CAS) No. 72 Wenhua Road Shenyang 110016 China
- School of Materials Science and Engineering University of Science and Technology of China No. 72 Wenhua Road Shenyang 110016 China
| | - Junchao Wang
- Shenyang National Laboratory for Materials Science (SYNL) Institute of Metal Research (IMR) Chinese Academy of Sciences (CAS) No. 72 Wenhua Road Shenyang 110016 China
| | - Yonghui Ma
- Structure Analysis Division Testing Center Institute of Metal Research Chinese Academy of Science Shenyang 110016 China
| | - Jing Li
- Shenyang National Laboratory for Materials Science (SYNL) Institute of Metal Research (IMR) Chinese Academy of Sciences (CAS) No. 72 Wenhua Road Shenyang 110016 China
| | - Xinglai Zhang
- Shenyang National Laboratory for Materials Science (SYNL) Institute of Metal Research (IMR) Chinese Academy of Sciences (CAS) No. 72 Wenhua Road Shenyang 110016 China
| | - Peiqing La
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 P.R. China
| | - Baodan Liu
- Shenyang National Laboratory for Materials Science (SYNL) Institute of Metal Research (IMR) Chinese Academy of Sciences (CAS) No. 72 Wenhua Road Shenyang 110016 China
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25
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Zhou L, Cao S, Zhang L, Xiang G, Wang J, Zeng X, Chen J. Facet effect of Co 3O 4 nanocatalysts on the catalytic decomposition of ammonium perchlorate. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122358. [PMID: 32109796 DOI: 10.1016/j.jhazmat.2020.122358] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 02/07/2020] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
Crystal facets can affect the catalytic decomposition of ammonium perchlorate, but the underlying mechanisms have long remained unclear. Here, we use the nanorods, nanosheets and nanocubes of Co3O4 catalysts exposing {110}, {111} and {100} facets as model systems to investigate facet effects on catalytic AP decomposition. The peak temperature of high temperature decomposition (HTD) process (THTD) of AP by nanorods, nanosheets and nanocubes Co3O4 decrease from 437.0 °C to 289.4 °C, 299.9 °C and 326.3 °C, respectively, showing obvious facet effects. We design experiments about AP decomposition under different atmospheres to investigate its mechanism and verify that the accumulation of ammonia (NH3) on AP surface can inhibit its decomposition and that the facet effects are related to the adsorption and oxidation of NH3. The binding energies of NH3 on the {110}, {111} and {100} planes calculated via density functional theory (DFT) are -1.774 eV, -1.638 eV, and -1.354 eV, respectively, indicating that the {110} planes are more favorable for the adsorption of NH3. Moreover, the {110} planes are readily to form CoNO structure, which benefits the further oxidation of the NH3.
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Affiliation(s)
- Linyu Zhou
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Shaobo Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Liangliang Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China.
| | - Guolei Xiang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Jiexin Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Xiaofei Zeng
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Jianfeng Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
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26
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Yang M, Li PH, Chen SH, Xiao XY, Tang XH, Lin CH, Huang XJ, Liu WQ. Nanometal Oxides with Special Surface Physicochemical Properties to Promote Electrochemical Detection of Heavy Metal Ions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001035. [PMID: 32406188 DOI: 10.1002/smll.202001035] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/26/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Heavy metal ions (HMIs) are one of the major environmental pollution problems currently faced. To monitor and control HMIs, rapid and reliable detection is required. Electrochemical analysis is one of the promising methods for on-site detection and monitoring due to high sensitivity, short response time, etc. Recently, nanometal oxides with special surface physicochemical properties have been widely used as electrode modifiers to enhance sensitivity and selectivity for HMIs detection. In this work, recent advances in the electrochemical detection of HMIs using nanometal oxides, which are attributed to specific crystal facets and phases, surficial defects and vacancies, and oxidation state cycle, are comprehensively summarized and discussed in aspects of synthesis, characterization, electroanalysis application, and mechanism. Moreover, the challenges and opportunities for the development and application of nanometal oxides with functional surface physicochemical properties in electrochemical determination of HMIs are presented.
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Affiliation(s)
- Meng Yang
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Pei-Hua Li
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Shi-Hua Chen
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiang-Yu Xiao
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiang-Hu Tang
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Chu-Hong Lin
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xing-Jiu Huang
- Key Laboratory of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Wen-Qing Liu
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
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27
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Chen K, Li W, Zhou Z, Huang Q, Liu Y, Duan Q. Hydroxyl groups attached to Co2+ on the surface of Co3O4: a promising structure for propane catalytic oxidation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00265h] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Co3O4 catalysts with three specific morphologies (nanocubes, nanosheets, and nanooctahedra) were prepared using simple preparation methods and tested for catalytic combustion of propane under the same reaction conditions.
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Affiliation(s)
- Kun Chen
- Laboratory of Basic Research in Biomass Conversion and Utilization
- Department of Thermal Science and Energy Engineering
- University of Science and Technology of China
- Hefei 230026
- PR China
| | - Wenzhi Li
- Laboratory of Basic Research in Biomass Conversion and Utilization
- Department of Thermal Science and Energy Engineering
- University of Science and Technology of China
- Hefei 230026
- PR China
| | - Zean Zhou
- Laboratory of Basic Research in Biomass Conversion and Utilization
- Department of Thermal Science and Energy Engineering
- University of Science and Technology of China
- Hefei 230026
- PR China
| | - Qifu Huang
- Beijing Mechanical Eqiupment Institute
- Beijing 100854
- PR China
| | - Yang Liu
- Laboratory of Basic Research in Biomass Conversion and Utilization
- Department of Thermal Science and Energy Engineering
- University of Science and Technology of China
- Hefei 230026
- PR China
| | - Qiuyan Duan
- Laboratory of Basic Research in Biomass Conversion and Utilization
- Department of Thermal Science and Energy Engineering
- University of Science and Technology of China
- Hefei 230026
- PR China
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28
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Wu M, Ke S, Chen W, Zhang S, Zhu M, Zhang Y, Foo ML, Tang L. Optimization of the facet structure of cobalt oxide catalysts for enhanced hydrogen evolution reaction. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01900f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The three different exposed crystal planes of Co3O4 catalysts, in which the {112} and {011} planes with abundant Co3+ sites exhibited photocatalytic hydrogen evolution activity superior to that of the {001} plane.
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Affiliation(s)
- Minghong Wu
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education
| | - Shuqiang Ke
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
| | - Wenqian Chen
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
- Shanghai Institute of Applied Radiation
| | - Shaomei Zhang
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
| | - Min Zhu
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
| | - Yu Zhang
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
| | - Maw Lin Foo
- Department of Chemistry
- National University of Singapore
- Singapore
| | - Liang Tang
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- PR China
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education
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29
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Liu Y, Zhang X, Wu B, Zhao H, Zhang W, Shan C, Yang J, Liu Q. Preparation Of ZnO/Co
3
O
4
Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation. ChemistrySelect 2019. [DOI: 10.1002/slct.201903620] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yangyang Liu
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590, Shandong China
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Xin Zhang
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Bowen Wu
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Haoyu Zhao
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Wei Zhang
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Congcong Shan
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Jing Yang
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
| | - Qing Liu
- College of Chemical and Environmental EngineeringShandong University of Science and Technology Qingdao 266590, Shandong China
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30
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Xu Y, Wu C, Ao L, Jiang K, Shang L, Li Y, Hu Z, Chu J. Three-dimensional porous Co 3O 4-CoO@GO composite combined with N-doped carbon for superior lithium storage. NANOTECHNOLOGY 2019; 30:425404. [PMID: 31386632 DOI: 10.1088/1361-6528/ab3070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Transition metal oxides (TMOs) as anode materials have potential for lithium-ion batteries (LIBs). However, the poor rate capacity and cycle stability restrict its application. Herein, we demonstrate a facile one-step hydrothermal method to construct a three-dimensional porous conductive network structure, which consists of thin-layered graphene, ultrafine Co3O4-CoO nanoparticles and nitrogen-doped carbon. This unique structure can effectively prevent particle agglomeration and cracking caused by volume expansion, provide fast passage for lithium ion/electron transport during cycling and improve the electrical conductivity of the electrode. Moreover, the electrochemical kinetic analysis proves that this is a process dominated by pseudocapacitive behavior. Consequently, the N-C@Co3O4-CoO@GO hybrid electrode delivers an ultrahigh capacity of 1 273.1 mA h g-1 at 0.1 A g-1 and superior rate performance (725.1 mA h g-1 at 5 A g-1). Additionally, it exhibits a high reversible cycling capacity of 787.4 mA h g-1 at 1 A g-1 over 600 cycles and even maintains excellent cycling stability for a ultra-long cycles at 5 A g-1. This work provides a feasible strategy for fabricating the N-C@Co3O4-CoO@GO composite as a promising high-performance TMOs anode for LIBs.
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Affiliation(s)
- Yanan Xu
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Department of Electronic Engineering, East China Normal University, Shanghai 200241, People's Republic of China
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31
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Kumar L, Boruah PK, Das MR, Deka S. Superbending (0-180°) and High-Voltage Operating Metal-Oxide-Based Flexible Supercapacitor. ACS APPLIED MATERIALS & INTERFACES 2019; 11:37665-37674. [PMID: 31549801 DOI: 10.1021/acsami.9b11963] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Among various energy storage devices, flexible supercapacitors having high mechanical stability with extreme bending and foldable features are highly attractive for a large number of emerging portable lightweight consumer devices. Here, we report the fabrication of such a superflexible supercapacitor by using novel octahedron-shaped NiCo2O4 nanoparticles as the electrode material for the first time. A new, low-cost hydrothermal method was used to synthesize 50-60 nm monodispersed perfect octahedron nanoparticles without any structural deformation. An all-solid-state symmetric flexible supercapacitor was fabricated by sandwiching the octahedron nanoparticles and [EMIM][BF4] ionic liquid electrolyte between two sheets of newly developed superflexible current collector substrate. The calculated specific capacity and specific capacitance values are found to be 97.9 mAh g-1 and 117.3 F g-1, respectively, at 0.625 A g-1 current density and 3.0 V applied potential. It also offered a high energy density value of 33.54 Wh kg-1 and 10 000 measured cycling stability. The supercapacitor is so flexible that it can be bent or fold up to 180° without any mechanical deformation, and the measured capacitance and energy and power densities remain almost constant at any angle of twisting. For instance, calculated values of capacitances obtained by bending the cell at angles of 180, 150, 135, 90, and 45° are found to be 62, 63.3, 63.73, 64, and 66 F g-1 respectively, in comparison to 67 F g-1 for a nonbending or flat (0°) cell. A faster ion switching between electrode/electrolyte interface, [EMIM][BF4] electrolyte, and octahedron shape of the nanoparticle electrode material is found to be responsible for the outstanding charge storage behavior.
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Affiliation(s)
- Lakshya Kumar
- Department of Chemistry , University of Delhi , North Campus , Delhi 110007 , India
| | - Purna K Boruah
- Advanced Materials Group, Materials Sciences and Technology Division , CSIR-North East Institute of Science and Technology , Jorhat 785006 , Assam , India
- Academy of Scientific and Innovative Research, CSIR-NEIST , Jorhat 785006 , Assam , India
| | - Manash R Das
- Advanced Materials Group, Materials Sciences and Technology Division , CSIR-North East Institute of Science and Technology , Jorhat 785006 , Assam , India
- Academy of Scientific and Innovative Research, CSIR-NEIST , Jorhat 785006 , Assam , India
| | - Sasanka Deka
- Department of Chemistry , University of Delhi , North Campus , Delhi 110007 , India
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32
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Yao J, Shi H, Sun D, Lu H, Hou B, Jia L, Xiao Y, Li D. Facet‐Dependent Activity of Co
3
O
4
Catalyst for C
3
H
8
Combustion. ChemCatChem 2019. [DOI: 10.1002/cctc.201901382] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Junxuan Yao
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
| | - Hui Shi
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Dekui Sun
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Huaiqian Lu
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Bo Hou
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Litao Jia
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Yong Xiao
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
| | - Debao Li
- State Key Laboratory of Coal Conversion Institute of Coal ChemistryThe Chinese Academy of Sciences 030001 Taiyuan P. R. China
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33
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Warmuth L, Feldmann C. β-SnWO 4 with Morphology-Controlled Synthesis and Facet-Depending Photocatalysis. ACS OMEGA 2019; 4:13400-13407. [PMID: 31460468 PMCID: PMC6704432 DOI: 10.1021/acsomega.9b01593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
Faceted β-SnWO4 microcrystals are prepared with different morphologies including tetrahedra, truncated tetrahedra, truncated octahedra, and short-spiked and long-spiked spikecubes. All of these morphologies are prepared with comparable experimental conditions via microwave-assisted synthesis of high-boiling alcohols (the so-called polyol method). The decisive parameters for controlled formation of one or the other morphology of faceted β-SnWO4 microcrystals are studied and discussed, including microwave-assisted heating, Sn(OH)2 as the Sn2+ reservoir, the temperature of particle nucleation, the temperature of particle growth, and the concentration of the starting materials. Morphology and crystallinity are characterized by scanning electron microscopy, X-ray powder diffraction, UV-vis, and Fourier-transform infrared spectroscopy. Finally, the photocatalytic properties of all obtained faceted microcrystals-tetrahedra, truncated tetrahedra, truncated octahedra, cubes, and short-spiked and long-spiked spikecubes-are exemplarily compared with regard to the photocatalytic decomposition of rhodamine B and the influence of the respective surface crystal planes.
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34
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Li J, Li X, Yin Z, Wang X, Ma H, Wang L. Synergetic Effect of Facet Junction and Specific Facet Activation of ZnFe 2O 4 Nanoparticles on Photocatalytic Activity Improvement. ACS APPLIED MATERIALS & INTERFACES 2019; 11:29004-29013. [PMID: 31314495 DOI: 10.1021/acsami.9b11836] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Crystal facet engineering has been proved as a versatile approach in modulating the photocatalytic activity of semiconductors. However, the facet-dependent properties and underlying mechanisms of spinel ZnFe2O4 in photocatalysis still have rarely been explored. Herein, ZnFe2O4 nanoparticles with different {001} and {111} facets exposed were successfully synthesized via a facile hydrothermal method. Facet-dependent photocatalytic degradation performance toward gaseous toluene under visible light irradiation was observed, where truncated octahedral ZnFe2O4 (ZFO(T)) nanoparticles with both {001} and {111} facets exposed exhibited a superior performance than the others. The formed surface facet junction between {010} and {100} facets was responsible for the improved activity by separating photogenerated e-/h+ pairs efficiently to reduce their recombination rate. Photogenerated electrons and holes were demonstrated to be immigrated onto {001} and {111} facets, separately. Intriguingly, electron paramagnetic resonance trapping results indicated that both •O2- and •OH were abundantly present in the ZFO(T) sample under visible light irradiation as major reactive oxygen species involved in the photocatalytic degradation process. Additionally, further investigation revealed that {001} facets played a predominant role in activating photogenerated transient species H2O2 into •OH, beneficially boosting the intrinsic photocatalytic activity. This work has not only presented a promising strategy in regulating photocatalytic performance through the synergetic effect of facet junction and specific facet activation but also broadened the application of facet engineering with multiple effects simultaneously cooperating.
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Affiliation(s)
- Jianan Li
- State Key Laboratory of Fine Chemicals and Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology , Dalian University of Technology , Dalian 116024 , China
| | - Xinyong Li
- State Key Laboratory of Fine Chemicals and Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology , Dalian University of Technology , Dalian 116024 , China
- ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering , The University of Queensland , St. Lucia , Brisbane , Queensland 4072 , Australia
| | - Zhifan Yin
- State Key Laboratory of Fine Chemicals and Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology , Dalian University of Technology , Dalian 116024 , China
| | - Xinyang Wang
- State Key Laboratory of Fine Chemicals and Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology , Dalian University of Technology , Dalian 116024 , China
| | - Hangfan Ma
- State Key Laboratory of Fine Chemicals and Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science & Technology , Dalian University of Technology , Dalian 116024 , China
| | - Lianzhou Wang
- ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering , The University of Queensland , St. Lucia , Brisbane , Queensland 4072 , Australia
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35
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Fan X, Ni K, Yang H, Lu L, Li S. Hierarchical porous CoO /carbon nanocomposite for enhanced lithium storage. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Stark MS, Kuntz KL, Martens SJ, Warren SC. Intercalation of Layered Materials from Bulk to 2D. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1808213. [PMID: 31069852 DOI: 10.1002/adma.201808213] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/01/2019] [Indexed: 05/23/2023]
Abstract
Intercalation in few-layer (2D) materials is a rapidly growing area of research to develop next-generation energy-storage and optoelectronic devices, including batteries, sensors, transistors, and electrically tunable displays. Identifying fundamental differences between intercalation in bulk and 2D materials will play a key role in developing functional devices. Herein, advances in few-layer intercalation are addressed in the historical context of bulk intercalation. First, synthesis methods and structural properties are discussed, emphasizing electrochemical techniques, the mechanism of intercalation, and the formation of a solid-electrolyte interphase. To address fundamental differences between bulk and 2D materials, scaling relationships describe how intercalation kinetics, structure, and electronic and optical properties depend on material thickness and lateral dimension. Here, diffusion rates, pseudocapacity, limits of staging, and electronic structure are compared for bulk and 2D materials. Next, the optoelectronic properties are summarized, focusing on charge transfer, conductivity, and electronic structure. For energy devices, opportunities also emerge to design van der Waals heterostructures with high capacities and excellent cycling performance. Initial studies of heterostructured electrodes are compared to state-of-the-art battery materials. Finally, challenges and opportunities are presented for 2D materials in energy and optoelectronic applications, along with promising research directions in synthesis and characterization to engineer 2D materials for superior devices.
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Affiliation(s)
- Madeline S Stark
- University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Kaci L Kuntz
- University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Sean J Martens
- University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Scott C Warren
- University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
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37
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Tsukiyama K, Takasaki M, Oaki Y, Imai H. Evolution of Co 3O 4 Nanocubes through Stepwise Oriented Attachment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8025-8030. [PMID: 31145617 DOI: 10.1021/acs.langmuir.9b00342] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Uniformly sized building units are generally required to construct highly elaborate architectures over a wide range. Defined nanocubes of Co3O4 evolved from deformed precursor nanograins 2-5 nm in diameter through direct oriented attachment in a nonpolar medium. Uniformly sized primary nanocubes ∼8 nm on a side with {100} faces were formed by adjusting the coverage of the oxide nanograins with oleic acid. Larger nanocubes 20-40 nm on a side were produced with further direct oriented attachment of the primary nanocubes. Ordered arrays, such as superlattices, were found to be constructed by the indirect oriented attachment of the primary and larger nanocubes covered with organic molecules.
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Affiliation(s)
- Keishi Tsukiyama
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi, Kohoku-ku , Yokohama 223-8522 , Japan
| | - Mihiro Takasaki
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi, Kohoku-ku , Yokohama 223-8522 , Japan
| | - Yuya Oaki
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi, Kohoku-ku , Yokohama 223-8522 , Japan
| | - Hiroaki Imai
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi, Kohoku-ku , Yokohama 223-8522 , Japan
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Cu-Doped Porous Carbon Derived from Heavy Metal-Contaminated Sewage Sludge for High-Performance Supercapacitor Electrode Materials. NANOMATERIALS 2019; 9:nano9060892. [PMID: 31213002 PMCID: PMC6630645 DOI: 10.3390/nano9060892] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/07/2019] [Accepted: 06/11/2019] [Indexed: 02/07/2023]
Abstract
In this paper, we report a complete solution for enhanced sludge treatment involving the removal of toxic metal (Cu(II)) from waste waters, subsequent pyrolytic conversion of these sludge to Cu-doped porous carbon, and their application in energy storage systems. The morphology, composition, and pore structure of the resultant Cu-doped porous carbon could be readily modulated by varying the flocculation capacity of Cu(II). The results demonstrated that it exhibited outstanding performance for supercapacitor electrode applications. The Cu(II) removal efficiency has been evaluated and compared to the possible energy benefits. The flocculant dosage up to 200 mg·L−1 was an equilibrium point existing between environmental impact and energy, at which more than 99% Cu(II) removal efficiency was achieved, while the resulting annealed product showed a high specific capacity (389.9·F·g−1 at 1·A·g−1) and good cycling stability (4% loss after 2500 cycles) as an electrode material for supercapacitors.
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Insights into the Morphological Effect of Co3O4 Crystallite on Catalytic Oxidation of Vinyl Chloride. Catalysts 2019. [DOI: 10.3390/catal9050408] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Co3O4 catalysts of cube and sphere shapes were prepared by one-step hydrothermal synthesis with different controlled amounts of Co(NO3)2·6H2O and NaOH. The morphological effects on both physicochemical properties and catalytic activities of vinyl chloride oxidation were investigated by material characterization and performance evaluation. The obtained results showed that the morphology, resulting in the exposure difference of crystal planes, significantly affected the catalytic property. The catalytic activity for vinyl chloride oxidation followed a descending order of Co3O4 cube (Co3O4-c) > Co3O4 sphere (Co3O4-s) > Co3O4 commercial (Co3O4-com). The cube-shaped Co3O4 presented higher catalytic activity and stability than Co3O4 spheres despite their similar crystallographic structures as well as physicochemical and redox properties. Accordingly, the different catalytic behaviors should be attributed to a morphological effect. The Co3O4 cube with a preferential exposure of (001) plane presented higher abundance of surface Co2+ cations and adsorbed oxygen species, which acted as the active sites responsible for the improvement of its catalytic activity.
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Zheng Y, Gao R, Zheng L, Sun L, Hu Z, Liu X. Ultrathin Co3O4 Nanosheets with Edge-Enriched {111} Planes as Efficient Catalysts for Lithium–Oxygen Batteries. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05182] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yue Zheng
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Rui Gao
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Limei Sun
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, People’s Republic of China
| | - Zhongbo Hu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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Wang F, Zuo Z, Li L, He F, Lu F, Li Y. A Universal Strategy for Constructing Seamless Graphdiyne on Metal Oxides to Stabilize the Electrochemical Structure and Interface. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806272. [PMID: 30548688 DOI: 10.1002/adma.201806272] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/06/2018] [Indexed: 06/09/2023]
Abstract
The structural and interfacial stabilities of metal oxides (MOs) are key issues while facing the volumetric variation and intensive interfacial polarization in electrochemical applications, including lithium-ion batteries (LIBs), supercapacitors, and catalysts. The growth of a seamless all-carbon interfacial layer on MOs with complex dimensions is not only a scientific problem, but also a practical challenge in these fields. Here, the growth of graphdiyne under ultramild condition is successfully implemented in situ for coating MOs of complex dimensions. The seamless all-carbon interface and conductive network are formed at the same time. This method cleverly avoids the structural degradation of MOs at a high temperature in the presence of traditional carbon materials. Under the protection of the high-quality graphdiyne layer, the samples as LIB anodes deliver high performances in terms of Coulomb efficiency, capacity, long-term retention, and structural and interfacial stabilities. Both experimental achievements and theoretical calculations demonstrate that the graphdiyne is a particular protection layer for MOs and plays a crucial role for preventing the structural and interfacial degradation of the electrode. Furthermore, the universality of this method will promote the potential applications of many promising MOs in other electrochemical fields.
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Affiliation(s)
- Fan Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zicheng Zuo
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Liang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Feng He
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Fushen Lu
- Department of Chemistry and Guangdong Key Laboratory for Preparation and Application of Ordered Structural Materials, Shantou University, Guangdong, 515063, P. R. China
| | - Yuliang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Size-dependent kinetics during non-equilibrium lithiation of nano-sized zinc ferrite. Nat Commun 2019; 10:93. [PMID: 30626870 PMCID: PMC6327060 DOI: 10.1038/s41467-018-07831-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 11/09/2018] [Indexed: 11/29/2022] Open
Abstract
Spinel transition metal oxides (TMOs) have emerged as promising anode materials for lithium-ion batteries. It has been shown that reducing their particle size to nanoscale dimensions benefits overall electrochemical performance. Here, we use in situ transmission electron microscopy to probe the lithiation behavior of spinel ZnFe2O4 as a function of particle size. We have found that ZnFe2O4 undergoes an intercalation-to-conversion reaction sequence, with the initial intercalation process being size dependent. Larger ZnFe2O4 particles (40 nm) follow a two-phase intercalation reaction. In contrast, a solid-solution transformation dominates the early stages of discharge when the particle size is about 6–9 nm. Using a thermodynamic analysis, we find that the size-dependent kinetics originate from the interfacial energy between the two phases. Furthermore, the conversion reaction in both large and small particles favors {111} planes and follows a core-shell reaction mode. These results elucidate the intrinsic mechanism that permits fast reaction kinetics in smaller nanoparticles. Reducing particle size of electrode materials to nanoscale dimensions is believed responsible for their enhanced reaction kinetics and electrochemical performance. Here, the authors use in situ transmission electron microscopy to study the dynamic process of the spinel zinc ferrite nanoparticles as a function of size, finding that the intercalation reaction pathway changes below a critical particle size.
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Facet-evolution growth of Mn3O4@CoxMn3-xO4 electrocatalysts on Ni foam towards efficient oxygen evolution reaction. J Catal 2019. [DOI: 10.1016/j.jcat.2018.10.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tang X, Liang M, Zhang Y, Sun W, Wang Y. Ultrafine ternary metal oxide particles with carbon nanotubes: a metal–organic-framework-based approach and superior lithium-storage performance. Dalton Trans 2019; 48:4413-4419. [DOI: 10.1039/c8dt05055d] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal–organic-framework template approach was used to fabricate ultrafine ternary metal oxide nanoparticles embedded in CNTs, which exhibit larger-than-theoretical reversible capacities for lithium-ion batteries.
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Affiliation(s)
- Xuxu Tang
- Department of Chemical Engineering
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai
- P. R. China
| | - Ming Liang
- Guangzhou Quality Supervision and Testing Institute
- Guangzhou
- P. R. China
| | - Yanfeng Zhang
- Department of Chemical Engineering
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai
- P. R. China
| | - Weiwei Sun
- Department of Chemical Engineering
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai
- P. R. China
| | - Yong Wang
- Department of Chemical Engineering
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai
- P. R. China
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Tao Y, Ding C, Tan D, Yu F, Wang F. Aqueous Dual-Ion Battery Based on a Hematite Anode with Exposed {1 0 4} Facets. CHEMSUSCHEM 2018; 11:4269-4274. [PMID: 30290060 DOI: 10.1002/cssc.201801918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/26/2018] [Indexed: 06/08/2023]
Abstract
The aqueous rechargeable lithium battery (ARLB) is one of the most promising devices for large-scale grid applications. Currently, a key issue for ARLBs is to develop promising anode materials with favorable electrochemical performances. Here, for the first time, we demonstrate an aqueous battery that utilizes the reversible redox reaction with hydroxide ions (OH- ) in the hematite (Fe2 O3 ) anode and a commercial Li ion intercalation compound in neutral solution as the cathode. The fabricated aqueous battery displays a reversible capacity of 92 mAh g-1 . The morphology of the used Fe2 O3 anode with exposed {1 0 4} facets for this aqueous battery is unique and attractive. Importantly, with the dual-pH neutral-alkaline hybrid electrolyte, many excellent anode materials that previously could only work in alkaline electrolytes can now be successfully combined with commercial cathodes in neutral solutions, which may significantly enrich the range of anode materials for ARLBs. In addition, the reported battery configuration can be extended to other aqueous batteries beyond Li-ion ones with lower cost.
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Affiliation(s)
- Yaping Tao
- College of Physics and Electronic Information, Luoyang Normal University, Luoyang, 471022, PR China
| | - Chunxia Ding
- College of Science, Hunan Agricultural University, Changsha, Hunan, 410128, PR China
| | - Deming Tan
- Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Feng Yu
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia
| | - Faxing Wang
- Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
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Facile synthesis of Co3O4/Co@N-doped carbon nanotubes as anode with improved cycling stability for Li-ion batteries. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.09.189] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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47
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Liu WW, Lau WM, Zhang Y. The electrochemical properties of Co 3O 4 as a lithium-ion battery electrode: a first-principles study. Phys Chem Chem Phys 2018; 20:25016-25022. [PMID: 30246198 DOI: 10.1039/c8cp04128h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extensive first principles calculations were performed to study the structural and electrochemical features of Co3O4 during its lithiation process as an anode material for lithium-ion batteries (LIBs). We found that with up to 8 mol Li in Co3O4, the formed LinCo3O4 structures are stable for low Li concentrations of n ≤ 1, but obvious structure distortions and volume expansions occur for LinCo3O4 with n > 1. This may be the reason why Co3O4 has a high Li capability but low cycling life as a LIB anode. The ab initio molecular dynamics simulations for LinCo3O4 (n = 2, 4, 8) further suggest a two-step electrochemistry process of Co3O4 → CoO → Co upon the lithiation process. We detected a distorted surface structure as Li atoms react with the Co3O4(110) surface, which also reduces the rate capability of the Co3O4 anode.
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Affiliation(s)
- Wei-Wei Liu
- Innovative Center for Advanced Materials, Hangzhou Dianzi University, Hangzhou 310012, China
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48
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Design of porous Co3O4 nanosheets via one-step synthesis as high-performance anode materials for lithium-ion batteries. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-4101-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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49
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Sytwu K, Hayee F, Narayan TC, Koh AL, Sinclair R, Dionne JA. Visualizing Facet-Dependent Hydrogenation Dynamics in Individual Palladium Nanoparticles. NANO LETTERS 2018; 18:5357-5363. [PMID: 30148640 DOI: 10.1021/acs.nanolett.8b00736] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface faceting in nanoparticles can profoundly impact the rate and selectivity of chemical transformations. However, the precise role of surface termination can be challenging to elucidate because many measurements are performed on ensembles of particles and do not have sufficient spatial resolution to observe reactions at the single and subparticle level. Here, we investigate solute intercalation in individual palladium hydride nanoparticles with distinct surface terminations. Using a combination of diffraction, electron energy loss spectroscopy, and dark-field contrast in an environmental transmission electron microscope (TEM), we compare the thermodynamics and directly visualize the kinetics of 40-70 nm {100}-terminated cubes and {111}-terminated octahedra with approximately 2 nm spatial resolution. Despite their distinct surface terminations, both particle morphologies nucleate the new phase at the tips of the particle. However, whereas the hydrogenated phase-front must rotate from [111] to [100] to propagate in cubes, the phase-front can propagate along the [100], [11̅0], and [111] directions in octahedra. Once the phase-front is established, the interface propagates linearly with time and is rate-limited by surface-to-subsurface diffusion and/or the atomic rearrangements needed to accommodate lattice strain. Following nucleation, both particle morphologies take approximately the same time to reach equilibrium, hydrogenating at similar pressures and without equilibrium phase coexistence. Our results highlight the importance of low-coordination number sites and strain, more so than surface faceting, in governing solute-driven reactions.
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Affiliation(s)
- Katherine Sytwu
- Department of Applied Physics , Stanford University , 348 Via Pueblo , Stanford , California 94305 , United States
| | - Fariah Hayee
- Department of Electrical Engineering , Stanford University , 350 Serra Mall , Stanford , California 94305 , United States
| | - Tarun C Narayan
- Department of Materials Science and Engineering , Stanford University , 496 Lomita Mall , Stanford , California 94305 , United States
| | - Ai Leen Koh
- Stanford Nano Shared Facilities , Stanford University , 476 Lomita Mall , Stanford , California 94305 , United States
| | - Robert Sinclair
- Department of Materials Science and Engineering , Stanford University , 496 Lomita Mall , Stanford , California 94305 , United States
| | - Jennifer A Dionne
- Department of Materials Science and Engineering , Stanford University , 496 Lomita Mall , Stanford , California 94305 , United States
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Wang Y, Zhang F, Yu Y, Yang Y, Mao P, Guo W, Rao S, Wang D, Li Q. Tailoring the carbon shell thickness of SnCo@nitrogen-doped carbon nanocages for optimized lithium storage. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.096] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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