1
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Wang L, Yu Q, Liu Y, Fujita T, Wei Y, Wang X, Zeng D. Controlled synthesis and photocatalytic hydrogen evolution activities of cobalt carbides with different phase compositions. NANOTECHNOLOGY 2023; 35:035705. [PMID: 37848017 DOI: 10.1088/1361-6528/ad0412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/16/2023] [Indexed: 10/19/2023]
Abstract
Cobalt carbides are emerging as promising materials for various magnetic and catalytic applications. However, exploring dedicated cobalt carbides with optimal catalytic properties via adjusting phase compositions remains a significant challenge. Herein, three different cobalt carbides, CoxC (Co2C-Co3C), Co2C-Co, and Co3C, were successfully prepared using a facile one-pot green method. The phase compositions of cobalt carbides could be easily controlled by varying the cobalt-based precursors and carbon sources. More remarkably, three different cobalt carbides could serve as reduction cocatalysts decorated CdS for improved hydrogen production under visible light. Intriguingly, the obtained Co3C/CdS nanocomposite displayed the highest photocatalytic hydrogen evolution activity among the three composites and superior photocatalytic stability. This work provides a fundamental approach to tuning the photocatalytic properties of cobalt carbides for energy conversion fields.
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Affiliation(s)
- Longfei Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
| | - Qingguo Yu
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
| | - Yimin Liu
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
| | - Toyohisa Fujita
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
| | - Yuezhou Wei
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, People's Republic of China
| | - Xinpeng Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
| | - Deqian Zeng
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People's Republic of China
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, People's Republic of China
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2
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Tu R, Leng K, Song C, Zhang C, Zheng Y, Han Y, Luo G, Zhang S, Goto T. The controllable synthesis of NiO/Ni/C nanosheets via pulsed plasma in ethylene glycol solution for oxygen evolution electrocatalysis. RSC Adv 2023; 13:19585-19594. [PMID: 37388144 PMCID: PMC10301700 DOI: 10.1039/d3ra02544f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/22/2023] [Indexed: 07/01/2023] Open
Abstract
NiO-based composites exhibit high catalytic activity for the oxygen evolution reaction (OER). Herein, high-performance NiO/Ni/C nanosheet catalysts were obtained by liquid-phase pulsed plasma (LPP), which was generated between two nickel electrodes in ethylene glycol (EG) solution by a homemade high-voltage pulse power supply. Melted nickel nanodrops were ejected from nickel electrodes which were bombarded by the energetic plasma. Simultaneously, high-temperature nickel nanodrops promoted the decomposition of the organics which were converted in the EG solution by the catalysis of LPP and formed hierarchical porous carbon nanosheets. Due to the high surface energy of the hierarchical porous carbon nanosheets, the spherical particles of Ni/NiO were adsorbed on the surface to compose the NiO/Ni/C composites. The pore size distribution of the composites could be controlled with different EG concentrations. When the EG concentration was 10 vol% (EG30), the composites possessed a H2 + H2 + H3 type pore size distribution and maximum active site area, leading to an exceptional OER activity (289.2 mV overpotential at 10 mA cm-2).
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Affiliation(s)
- Rong Tu
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
- Wuhan University of Technology, Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528400 China
| | - Kunqiu Leng
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
| | - Chao Song
- School of Materials Science and Engineering, Hanshan Normal University Chaozhou 521041 China
| | - Chitengfei Zhang
- Hubei Longzhong Laboratory Xiangyang 441000 China
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
| | - Yingqiu Zheng
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
| | - Yuzhe Han
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
| | - Guoqiang Luo
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
| | - Song Zhang
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China
- Hubei Longzhong Laboratory Xiangyang 441000 China
| | - Takashi Goto
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 China
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3
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Corbella C, Portal S, Kundrapu MN, Keidar M. Nanosynthesis by atmospheric arc discharges excited with pulsed-DC power: a review. NANOTECHNOLOGY 2022; 33:342001. [PMID: 35487195 DOI: 10.1088/1361-6528/ac6bad] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/29/2022] [Indexed: 06/14/2023]
Abstract
Plasma technology is actively used for nanoparticle synthesis and modification. All plasma techniques share the ambition of providing high quality, nanostructured materials with full control over their crystalline state and functional properties. Pulsed-DC physical/chemical vapour deposition, high power impulse magnetron sputtering, and pulsed cathodic arc are consolidated low-temperature plasma processes for the synthesis of high-quality nanocomposite films in vacuum environment. However, atmospheric arc discharge stands out thanks to the high throughput, wide variety, and excellent quality of obtained stand-alone nanomaterials, mainly core-shell nanoparticles, transition metal dichalcogenide monolayers, and carbon-based nanostructures, like graphene and carbon nanotubes. Unique capabilities of this arc technique are due to its flexibility and wide range of plasma parameters achievable by modulation of the frequency, duty cycle, and amplitude of pulse waveform. The many possibilities offered by pulsed arc discharges applied on synthesis of low-dimensional materials are reviewed here. Periodical variations in temperature and density of the pulsing arc plasma enable nanosynthesis with a more rational use of the supplied power. Parameters such as plasma composition, consumed power, process stability, material properties, and economical aspects, are discussed. Finally, a brief outlook towards future tendencies of nanomaterial preparation is proposed. Atmospheric pulsed arcs constitute promising, clean processes providing ecological and sustainable development in the production of nanomaterials both in industry and research laboratories.
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Affiliation(s)
- Carles Corbella
- Department of Mechanical and Aerospace Engineering, George Washington University, 800 22nd Street, Northwest, Washington, DC 20052, United States of America
| | - Sabine Portal
- Department of Mechanical and Aerospace Engineering, George Washington University, 800 22nd Street, Northwest, Washington, DC 20052, United States of America
| | - Madhusudhan N Kundrapu
- Tech-X Corporation, 5621 Arapahoe Ave. Suite A, Boulder, CO 80303, United States of America
| | - Michael Keidar
- Department of Mechanical and Aerospace Engineering, George Washington University, 800 22nd Street, Northwest, Washington, DC 20052, United States of America
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4
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Madsen RSK, Stepniewska M, Yang Y, Qiao A, Winters WMW, Zhou C, König J, Mauro JC, Yue Y. Mixed metal node effect in zeolitic imidazolate frameworks. RSC Adv 2022; 12:10815-10824. [PMID: 35424998 PMCID: PMC8988268 DOI: 10.1039/d2ra00744d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 03/26/2022] [Indexed: 11/21/2022] Open
Abstract
We synthesized two series of bimetallic (zinc and cobalt) zeolitic imidazolate frameworks (ZIF-62) under different solvothermal conditions. It is found that the structure of the derived ZIF crystals is highly sensitive to synthesis conditions. One series possesses the standard ZIF-62 structure, whereas the other has a mixed structure composed of both the standard structure and an unknown one. The standard series exhibits a slight negative deviation from linearity of melting temperature (T m) and glass transition temperature (T g) with the substitution of Co for Zn. In contrast, the new series displays a stronger negative deviation. These negative deviations from linearity indicate the mixed metal node effect in bimetallic ZIF-62 due to the structural mismatch between Co2+ and Zn2+ and to the difference in their electronic configurations. The new series involves both cobalt-rich and zinc-rich phases, whereas the standard one shows one homogeneous phase. Density functional theory calculations predict that the substitution of Co for Zn increases the bulk modulus of the ZIF crystals. This work indicates that the structure, melting behaviour, and mechanical properties of ZIFs can be tuned by metal node substitution and by varying the synthetic conditions. Both series of ZIFs have higher glass forming abilities due to their higher T g/T m ratios (0.77-0.84) compared to most good glass formers.
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Affiliation(s)
- Rasmus S K Madsen
- Department of Chemistry and Bioscience, Aalborg University Aalborg DK9220 Denmark
| | - Malwina Stepniewska
- Department of Chemistry and Bioscience, Aalborg University Aalborg DK9220 Denmark
| | - Yongjian Yang
- Department of Materials Science and Engineering, The Pennsylvania State University USA
| | - Ang Qiao
- Wuhan University of Technology Wuhan 430070 China
| | - Wessel M W Winters
- Department of Chemistry and Bioscience, Aalborg University Aalborg DK9220 Denmark
| | - Chao Zhou
- Department of Chemistry and Bioscience, Aalborg University Aalborg DK9220 Denmark
| | - Jakob König
- Advanced Materials Department, Jožef Stefan Institute Ljubljana 1000 Slovenia
| | - John C Mauro
- Department of Materials Science and Engineering, The Pennsylvania State University USA
| | - Yuanzheng Yue
- Department of Chemistry and Bioscience, Aalborg University Aalborg DK9220 Denmark
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5
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Gajdek D, Olsson PAT, Blomberg S, Gustafson J, Carlsson PA, Haase D, Lundgren E, Merte LR. Structural Changes in Monolayer Cobalt Oxides under Ambient Pressure CO and O 2 Studied by In Situ Grazing-Incidence X-ray Absorption Fine Structure Spectroscopy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:3411-3418. [PMID: 35242268 PMCID: PMC8883796 DOI: 10.1021/acs.jpcc.1c10284] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/03/2022] [Indexed: 06/14/2023]
Abstract
We have used grazing incidence X-ray absorption fine structure spectroscopy at the cobalt K-edge to characterize monolayer CoO films on Pt(111) under ambient pressure exposure to CO and O2, with the aim of identifying the Co phases present and their transformations under oxidizing and reducing conditions. X-ray absorption near edge structure (XANES) spectra show clear changes in the chemical state of Co, with the 2+ state predominant under CO exposure and the 3+ state predominant under O2-rich conditions. Extended X-ray absorption fine structure spectroscopy (EXAFS) analysis shows that the CoO bilayer characterized in ultrahigh vacuum is not formed under the conditions used in this study. Instead, the spectra acquired at low temperatures suggest formation of cobalt hydroxide and oxyhydroxide. At higher temperatures, the spectra indicate dewetting of the film and suggest formation of bulklike Co3O4 under oxidizing conditions. The experiments demonstrate the power of hard X-ray spectroscopy to probe the structures of well-defined oxide monolayers on metal single crystals under realistic catalytic conditions.
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Affiliation(s)
- Dorotea Gajdek
- Department
of Materials Science and Applied Mathematics, Malmö University, SE-211 19 Malmö, Sweden
- NanoLund, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - Pär A. T. Olsson
- Department
of Materials Science and Applied Mathematics, Malmö University, SE-211 19 Malmö, Sweden
- Division
of Mechanics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - Sara Blomberg
- NanoLund, Lund University, Box 118, SE-221 00 Lund, Sweden
- Department
of Chemical Engineering, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - Johan Gustafson
- Division
of Synchrotron Radiation Research, Lund
University, Box 118, SE-221
00 Lund, Sweden
| | - Per-Anders Carlsson
- Department
of Chemistry and Chemical Engineering, Chalmers
University of Technology, SE-412 96 Göteborg, Sweden
- Competence
Centre for Catalysis, Chalmers University
of Technology, SE-412 96 Göteborg, Sweden
| | - Dörthe Haase
- MAX
IV Laboratory, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - Edvin Lundgren
- NanoLund, Lund University, Box 118, SE-221 00 Lund, Sweden
- Division
of Synchrotron Radiation Research, Lund
University, Box 118, SE-221
00 Lund, Sweden
| | - Lindsay R. Merte
- Department
of Materials Science and Applied Mathematics, Malmö University, SE-211 19 Malmö, Sweden
- NanoLund, Lund University, Box 118, SE-221 00 Lund, Sweden
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6
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He J, Mao D, Liu J, Tang D, Yin C. Carbon nanotubes obtained from commercial resins with different treatment temperatures. NEW J CHEM 2022. [DOI: 10.1039/d2nj00381c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon nanotubes were prepared with commercial resin by a simple method to explore the effects of different calcination temperatures.
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Affiliation(s)
- Jing He
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, P. R. China
| | - Di Mao
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, P. R. China
| | - Junyan Liu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, P. R. China
| | - Duihai Tang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, P. R. China
| | - Chengyang Yin
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, P. R. China
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7
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Energy Storage and CO2 Reduction Performances of Co/Co2C/C Prepared by an Anaerobic Ethanol Oxidation Reaction Using Sacrificial SnO2. Catalysts 2020. [DOI: 10.3390/catal10101116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Co/Co2C/C hybrids were prepared employing a new synthetic route and demonstrated as materials for energy storage and CO2 recycling application. Herein, an anaerobic ethanol oxidation reaction over Co3O4 nanoparticles (NPs) was first employed to fabricate Co/Co2C/C hybrids using sacrificial SnO2. In the absence of SnO2, Co3O4 NPs were converted to alpha and beta metallic Co. On the other hand, using sacrificial SnO2 resulted in the formation of Co2C and Co embedded in the carbon matrix at approximately 450 °C, as determined by temperature-programmed mass spectrometry analysis. The newly developed materials were fully examined by X-ray diffraction crystallography, scanning electron microscopy, energy-dispersive X-ray analysis, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The Co/Co2C/C hybrids showed a specific capacitance of 153 F/g at a current density of 0.5 A/g. Photocatalytic CO2 reduction experiments were performed and generated CO, CH4, and CH3OH as reduction products with yields of 47.7, 11.0, and 23.4 μmol/g, respectively. The anaerobic ethanol oxidation reaction could be a very useful method for the development of carbon-supported metal carbides, which have not been achieved by other synthetic methods. Furthermore, the demonstration tests unveiled new application areas of Co carbide materials.
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8
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Zakaria MB, Zheng D, Apfel UP, Nagata T, Kenawy ERS, Lin J. Dual-Heteroatom-Doped Reduced Graphene Oxide Sheets Conjoined CoNi-Based Carbide and Sulfide Nanoparticles for Efficient Oxygen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2020; 12:40186-40193. [PMID: 32805866 DOI: 10.1021/acsami.0c06141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Intensive research is being conducted into highly efficient and cheap nanoscale materials for the electrocatalytic oxidation of water. In this context, we built heterostructures of multilayered CoNi-cyanide bridged coordination (CoNi-CP) nanosheets and graphene oxide (GO) sheets (CoNi-CP/GO) as a source for heterostructured functional electrodes. The layered CoNi-CP/GO hybrid components heated in nitrogen gas (N2) at 450 °C yield CoNi-based carbide (CoNi-C) through thermal decomposition of CoNi-CP, while GO is converted into reduced GO (rGO) to finally form a CoNi-C/rGO-450 composite. The CoNi-C/rGO-450 composite shows a reasonable efficiency for oxygen evolution reaction (OER) through water oxidations in alkaline solution. Meanwhile, regulated annealing of CoNi-CP/GO in N2 with thiourea at 450 and 550 °C produces CoNi-based sulfide (CoNi-S) rather than CoNi-C between rGO sheets co-doped by nitrogen (N) and sulfur (S) heteroatoms (NS-rGO) to form CoNi-S/NS-rGO-450 and CoNi-S/NS-rGO-550 composites, respectively. The CoNi-S/NS-rGO-550 shows the best efficiency for electrocatalytic OER among all electrodes with an overpotential of 290 mV at 10 mA cm-2 and a Tafel slope of 79.5 mV dec-1. By applying the iR compensation to remove resistance of the solution (2.1 Ω), the performance is further improved to achieve a current density of 10 mA cm-2 at an overpotential of 274 mV with a Tafel slope of 70.5 mV dec-1. This result is expected to be a promising electrocatalyst compared to the currently used electrocatalysts and a step for fuel cell applications in the future.
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Affiliation(s)
- Mohamed Barakat Zakaria
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao 266042, China
- Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Dehua Zheng
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao 266042, China
| | - Ulf-Peter Apfel
- Faculty of Chemistry and Biochemistry, Ruhr-Universitat Bochum (RUB), Bochum 150, Germany
- Fraunhofer UMSICHT, Osterfelder Strasse 3, Oberhausen 46047, Germany
| | - Takahiro Nagata
- International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - El-Refaie S Kenawy
- Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Jianjian Lin
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao 266042, China
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Jang J, Sharma M, Choi D, Kang YS, Kim Y, Min J, Sung H, Jung N, Yoo SJ. Boosting Fuel Cell Durability under Shut-Down/Start-Up Conditions Using a Hydrogen Oxidation-Selective Metal-Carbon Hybrid Core-Shell Catalyst. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27735-27742. [PMID: 31264827 DOI: 10.1021/acsami.9b06309] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Performance degradation generated by reverse current flow during fuel cell shut-down/start-up is a big challenge for commercialization of polymer electrolyte membrane fuel cells in automobile applications. Under transient operating conditions, the formation of H2/O2 boundaries on Pt surfaces and the occurrence of undesired oxygen reduction reaction (ORR) in an anode cause severe degradation of carbon supports and Pt catalysts in a cathode because of an increase of the cathode potential up to ∼1.5 V. Herein, to directly prevent the formation of H2/O2 boundaries in the anode, we propose a unique metal-carbon hybrid core-shell anode catalyst having Pt nanoparticles encapsulated in nanoporous carbon shells for selective H2 permeation. This hybrid catalyst exhibits high hydrogen oxidation reaction (HOR) selectivity along with fully subdued ORR activity during long-term operation because of the excellent stability of the carbon molecular sieves. Furthermore, the HOR-selective catalyst effectively suppresses the reverse current flow in a single cell under shut-down/start-up conditions.
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Affiliation(s)
- Jeonghee Jang
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Monika Sharma
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Daeil Choi
- Center for Fuel Cell Research , Korea Institute of Science and Technology (KIST) , Seoul 136-791 , Republic of Korea
- Division of Energy , Environment Technology, KIST School , University of Science and Technology (UST) , Seoul 02792 , Republic of Korea
| | - Yun Sik Kang
- Center for Fuel Cell Research , Korea Institute of Science and Technology (KIST) , Seoul 136-791 , Republic of Korea
| | - Youngjin Kim
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Jiho Min
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Hukwang Sung
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Namgee Jung
- Graduate School of Energy Science and Technology (GEST) , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Sung Jong Yoo
- Center for Fuel Cell Research , Korea Institute of Science and Technology (KIST) , Seoul 136-791 , Republic of Korea
- Division of Energy , Environment Technology, KIST School , University of Science and Technology (UST) , Seoul 02792 , Republic of Korea
- KHU-KIST Department of Converging Science and Technology , Kyung Hee University , Seoul 02447 , Republic of Korea
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10
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Kashyap V, Anand A, Soni R, Sreekumar K. Medium Modulated Oxygen Reduction Activity of Fe/Co Active Centre‐engrafted Electrocatalysts. ChemElectroChem 2019. [DOI: 10.1002/celc.201900260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Varchaswal Kashyap
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 41108 India
- Academy of Scientific and Innovative ResearchInstitutionAnusandhan Bhawan 2 RafiMarg New Delhi 110001 India
| | - Aljo Anand
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 41108 India
| | - Roby Soni
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 41108 India
- Academy of Scientific and Innovative ResearchInstitutionAnusandhan Bhawan 2 RafiMarg New Delhi 110001 India
| | - Kurungot Sreekumar
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 41108 India
- Academy of Scientific and Innovative ResearchInstitutionAnusandhan Bhawan 2 RafiMarg New Delhi 110001 India
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11
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Zhang Y, Pan A, Ding L, Zhou Z, Wang Y, Niu S, Liang S, Cao G. Nitrogen-Doped Yolk-Shell-Structured CoSe/C Dodecahedra for High-Performance Sodium Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2017; 9:3624-3633. [PMID: 28075123 DOI: 10.1021/acsami.6b13153] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this work, nitrogen-doped, yolk-shell-structured CoSe/C mesoporous dodecahedra are successfully prepared by using cobalt-based metal-organic frameworks (ZIF-67) as sacrificial templates. The CoSe nanoparticles are in situ produced by reacting the cobalt species in the metal-organic frameworks with selenium (Se) powder, and the organic species are simultaneously converted into nitrogen-doped carbon material in an inert atmosphere at temperatures between 700 and 900 °C for 4 h. For the composite synthesized at 800 °C, the carbon framework has a relatively higher extent of graphitization, with high nitrogen content (17.65%). Furthermore, the CoSe nanoparticles, with a size of around 15 nm, are coherently confined in the mesoporous carbon framework. When evaluated as novel anode materials for sodium ion batteries, the CoSe/C composites exhibit high capacity and superior rate capability. The composite electrode delivers the specific capacities of 597.2 and 361.9 mA h g-1 at 0.2 and 16 A g-1, respectively.
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Affiliation(s)
- Yifang Zhang
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Anqiang Pan
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Lin Ding
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Zilong Zhou
- School of Resources & Safety Engineering, Central South University , Changsha 410083, Hunan China
| | - Yaping Wang
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Shaoyu Niu
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Shuquan Liang
- School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan China
| | - Guozhong Cao
- Department of Materials Science & Engineering, University of Washington , Seattle, Washington 98195, United States
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12
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Kim GM, Baik S, Lee JW. Enhanced oxygen reduction from the insertion of cobalt into nitrogen-doped porous carbons. RSC Adv 2015. [DOI: 10.1039/c5ra15635a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Enhanced oxygen reduction reaction activity by impregnating Co3O4 to N-doped porous carbons.
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Affiliation(s)
- Gi Mihn Kim
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
| | - Seoyeon Baik
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
| | - Jae W. Lee
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
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Ren F, Kanaan SA, Majewska MM, Keskar GD, Azoz S, Wang H, Wang X, Haller GL, Chen Y, Pfefferle LD. Increase in the yield of (and selective synthesis of large-diameter) single-walled carbon nanotubes through water-assisted ethanol pyrolysis. J Catal 2014. [DOI: 10.1016/j.jcat.2013.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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