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Krajewski M, Tokarczyk M, Lewińska S, Brzózka K, Bochenek K, Ślawska-Waniewska A. Evolution of Structural and Magnetic Properties of Fe-Co Wire-like Nanochains Caused by Annealing Atmosphere. MATERIALS 2021; 14:ma14164748. [PMID: 34443270 PMCID: PMC8401208 DOI: 10.3390/ma14164748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 11/16/2022]
Abstract
Thermal treatment is a post-synthesis treatment that aims to improve the crystallinity and interrelated physical properties of as-prepared materials. This process may also cause some unwanted changes in materials like their oxidation or contamination. In this work, we present the post-synthesis annealing treatments of the amorphous Fe1-xCox (x = 0.25; 0.50; 0.75) Wire-like nanochains performed at 400 °C in two different atmospheres, i.e., a mixture of 80% nitrogen and 20% hydrogen and argon. These processes caused significantly different changes of structural and magnetic properties of the initially-formed Fe-Co nanostructures. All of them crystallized and their cores were composed of body-centered cubic Fe-Co phase, whereas their oxide shells comprised of a mixture of CoFe2O4 and Fe3O4 phases. However, the annealing carried out in hydrogen-containing atmosphere caused a decomposition of the initial oxide shell layer, whereas a similar process in argon led to its slight thickening. Moreover, it was found that the cores of thermally-treated Fe0.25Co0.75 nanochains contained the hexagonal closest packed (hcp) Co phase and were covered by the nanosheet-like shell layer in the case of annealing performed in argon. Considering the evolution of magnetic properties induced by structural changes, it was observed that the coercivities of annealed Fe-Co nanochains increased in comparison with their non-annealed counterparts. The saturation magnetization (MS) of the Fe0.25Co0.75 nanomaterial annealed in both atmospheres was higher than that for the non-annealed sample. In turn, the MS of the Fe0.75Co0.25 and Fe0.50Co0.50 nanochains annealed in argon were lower than those recorded for non-annealed samples due to their partial oxidation during thermal processing.
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Affiliation(s)
- Marcin Krajewski
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland;
- Correspondence:
| | - Mateusz Tokarczyk
- Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland;
| | - Sabina Lewińska
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland; (S.L.); (A.Ś.-W.)
| | - Katarzyna Brzózka
- Faculty of Mechanical Engineering, Department of Physics, University of Technology and Humanities, Stasieckiego 54, 26-600 Radom, Poland;
| | - Kamil Bochenek
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland;
| | - Anna Ślawska-Waniewska
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland; (S.L.); (A.Ś.-W.)
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Hossain MJ, Rahman MS, Sharif MJ. Micromixer: An Effective Tool for the Production of Sub-Nanosized Noble Metal Particles. INTERNATIONAL JOURNAL OF NANOSCIENCE 2020. [DOI: 10.1142/s0219581x20500131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper demonstrates the functionality of a simple and convenient microfluidic method in synthesizing a series of poly(vinylpyrrolidone) (PVP) stabilized nanoparticles (NPs) of various novel metals (Pt, Pd, Ru, Rh, Ag, and Au) with an average diameter of [Formula: see text]2 nm. In this method, the use of microfluidic mixture provided a homogenous mixing of the metal precursors and reducing agent nearly at the molecular level, that yield monodispersed sub-nanosize NPs. Core diameters of the produced NPs determined by transmission electron microscopy (TEM), were [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text][Formula: see text]nm for Pt, Pd, Ru, Rh, Ag and Au NPs, respectively. Of them, Pt NPs were detailed characterized. The obtained Pt NPs were found to have fcc crystal structure with 1.2 nm crystalline size which is very similar to the corresponding TEM result. The efficiency of the synthesis of NPs by micromixer was compared with batch/NaBH4 reduction method for the Pt NPs. It was found that in batch method the as-prepared NPs decreased the reducing ability of NaBH4 by catalytic degradation. In contrast, the micromixer could separate the produced metal NPs from the reaction system soon after the formation of NPs and enables feeding the fresh NaBH4 solution throughout the synthesis. Fourier Transform Infrared (FTIR) spectrometry measurements of adsorbed [Formula: see text]CO molecules on Pt NPs showed that the NPs surface were negatively charged with a high population of edge and vertices atoms.
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Affiliation(s)
- M. Jakir Hossain
- Forest Chemistry Division, Bangladesh Forest Research Institute, Chittagong 4211, Bangladesh
| | - Md Saidur Rahman
- Industrial Botany Research Division, Bangladesh Council of Scientific and Industrial Research, Chittagong, Cittagong-4220, Bangladesh
| | - Md Jafar Sharif
- Department of Chemistry, Military Institute of Science & Technology (MIST), Mirpur, Dhaka-1216, Bangladesh
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Yuan J, Li CF, Liu ZQ, Wu D, Cao L. Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes. CrystEngComm 2017. [DOI: 10.1039/c7ce01353a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
TEM characterization of FeCo nanosheets and FeCo cubes.
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Affiliation(s)
- Jie Yuan
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016
- China
- School of Materials Science and Engineering
| | - Cai-Fu Li
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016
- China
| | - Zhi-Quan Liu
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016
- China
- School of Materials Science and Engineering
| | - Di Wu
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016
- China
| | - Lihua Cao
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016
- China
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Yamauchi M, Ozawa N, Kubo M. Experimental and Quantum Chemical Approaches to Develop Highly Selective Nanocatalysts for CO2-free Power Circulation. CHEM REC 2016; 16:2249-2259. [DOI: 10.1002/tcr.201600047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I CNER), Kyushu University; Motooka 744 Nishi-ku Fukuoka 819-0395 Japan
| | - Nobuki Ozawa
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
| | - Momoji Kubo
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
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Wu ZP, Liu T, Chen DM, Wu G, Wang QH, Yin YH, Li YS, Xu QF, Krishamurthy A. A facile method to improving the electromagnetic interference shielding of a free-standing and foldable carbon nanotube mat. RSC Adv 2016. [DOI: 10.1039/c6ra11507a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Free-standing and foldable CNT mats with high saturation magnetization and low electrical resistance were prepared, and a high EMI SE of 40.4–60.3 dB can be achieved at frequency ranges of 1 GHz to 18 GHz with a low mat thickness of 1.0 μm.
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Affiliation(s)
- Zi Ping Wu
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Ting Liu
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - De Ming Chen
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Gao Wu
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Qing Hui Wang
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Yan Hong Yin
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Ye Sheng Li
- School of Materials Science and Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Qian Feng Xu
- Chemistry Department
- College of Staten Island
- City University of New York
- New York
- USA
| | - Ajay Krishamurthy
- Department of Mechanical
- Aerospace and Nuclear Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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Matsumoto T, Sadakiyo M, Ooi ML, Yamamoto T, Matsumura S, Kato K, Takeguchi T, Ozawa N, Kubo M, Yamauchi M. Atomically mixed Fe-group nanoalloys: catalyst design for the selective electrooxidation of ethylene glycol to oxalic acid. Phys Chem Chem Phys 2015; 17:11359-66. [DOI: 10.1039/c5cp00954e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic performances of Fe-group-nanoalloys, which serve as anode catalysts in direct ethylene glycol alkaline fuel cells, were fine tuned.
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Affiliation(s)
- Takeshi Matsumoto
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- CREST
| | - Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- CREST
| | - Mei Lee Ooi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- CREST
| | - Tomokazu Yamamoto
- CREST
- JST
- Kawaguchi
- Japan
- Department of Applied Quantum Physics and Nuclear Engineering
| | - Syo Matsumura
- CREST
- JST
- Kawaguchi
- Japan
- Department of Applied Quantum Physics and Nuclear Engineering
| | | | | | - Nobuki Ozawa
- CREST
- JST
- Kawaguchi
- Japan
- Fracture and Reliability Research Institute (FRRI)
| | - Momoji Kubo
- Fracture and Reliability Research Institute (FRRI)
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579
- Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- CREST
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Sadakiyo M, Heima M, Yamamoto T, Matsumura S, Matsuura M, Sugimoto S, Kato K, Takata M, Yamauchi M. Preparation of solid–solution type Fe–Co nanoalloys by synchronous deposition of Fe and Co using dual arc plasma guns. Dalton Trans 2015; 44:15764-8. [DOI: 10.1039/c5dt02815a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We succeeded in the efficient preparation of well-dispersed Fe–Co nanoalloys (NAs) using the arc plasma deposition method.
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Affiliation(s)
- Masaaki Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Core Research for Evolutional Science and Technology (CREST)
| | - Minako Heima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Core Research for Evolutional Science and Technology (CREST)
| | - Tomokazu Yamamoto
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST)
- Tokyo 102-0076
- Japan
- Department of Applied Quantum Physics and Nuclear Engineering
| | - Syo Matsumura
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST)
- Tokyo 102-0076
- Japan
- Department of Applied Quantum Physics and Nuclear Engineering
| | - Masashi Matsuura
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST)
- Tokyo 102-0076
- Japan
- Department of Materials Science
| | - Satoshi Sugimoto
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST)
- Tokyo 102-0076
- Japan
- Department of Materials Science
| | - Kenichi Kato
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST)
- Tokyo 102-0076
- Japan
- RIKEN SPring-8 Center
| | | | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Core Research for Evolutional Science and Technology (CREST)
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Matsumoto T, Sadakiyo M, Ooi ML, Kitano S, Yamamoto T, Matsumura S, Kato K, Takeguchi T, Yamauchi M. CO2-free power generation on an iron group nanoalloy catalyst via selective oxidation of ethylene glycol to oxalic acid in alkaline media. Sci Rep 2014; 4:5620. [PMID: 25004118 PMCID: PMC4086216 DOI: 10.1038/srep05620] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 06/20/2014] [Indexed: 01/11/2023] Open
Abstract
An Fe group ternary nanoalloy (NA) catalyst enabled selective electrocatalysis towards CO2-free power generation from highly deliverable ethylene glycol (EG). A solid-solution-type FeCoNi NA catalyst supported on carbon was prepared by a two-step reduction method. High-resolution electron microscopy techniques identified atomic-level mixing of constituent elements in the nanoalloy. We examined the distribution of oxidised species, including CO2, produced on the FeCoNi nanoalloy catalyst in the EG electrooxidation under alkaline conditions. The FeCoNi nanoalloy catalyst exhibited the highest selectivities toward the formation of C2 products and to oxalic acid, i.e., 99 and 60%, respectively, at 0.4 V vs. the reversible hydrogen electrode (RHE), without CO2 generation. We successfully generated power by a direct EG alkaline fuel cell employing the FeCoNi nanoalloy catalyst and a solid-oxide electrolyte with oxygen reduction ability, i.e., a completely precious-metal-free system.
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Affiliation(s)
- Takeshi Matsumoto
- 1] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan [2] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Masaaki Sadakiyo
- 1] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan [2] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Mei Lee Ooi
- 1] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan [2] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Sho Kitano
- 1] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan [2] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Tomokazu Yamamoto
- 1] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan [2] Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Syo Matsumura
- 1] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan [2] Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kenichi Kato
- 1] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan [2] RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tatsuya Takeguchi
- 1] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan [2] Department of Chemistry and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan
| | - Miho Yamauchi
- 1] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan [2] CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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