Synthesis of cobalt boride nanoparticles using RF thermal plasma

Choi, Sun Keun; Lapitan, Lorico DS.; Cheng, Yingying; Watanabe, Takayuki

doi:10.1016/j.apt.2013.06.002

Cited by 38 publications

(14 citation statements)

References 23 publications

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“…Comparison of XRD patterns of Co3O4 before and after participating in the catalytic process demonstrates that Co3O4 still remains the main component of catalyst after the hydrolysis reaction. In addition, it can be seen that CoO peaks which were present in the film have disappeared after the hydrolysis reaction and two minor peaks centered at 38.6º and 55.8º (marked as*) have appeared which correspond to the CoxB active phase [25]. The absence of CoO phase after hydrolysis reaction suggests that CoO could have been transformed either, into Co or CoxB phase.…”

Section: Fig 1(a)mentioning

confidence: 98%

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

Jadhav¹,

Sinha²

2021

Adv. Mater. Lett.

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Section: Fig 1(a)mentioning

confidence: 98%

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

Jadhav¹,

Sinha²

2021

Adv. Mater. Lett.

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“…Bu özellikleri sayesinde kimya endüstrisinden malzeme teknolojisine kadar birçok alanda kullanım yeri bulmakta ve ayrıca birçok ileri teknoloji alanı için potansiyel malzeme olarak görülmektedir. Çeşitli yöntemlerle üretilen kobalt borür bileşiklerinin ya da alaşımlarının bu özellikleri, farklı uygulama alanlarına yönelik literatürde incelenmiş ve özelikle elektrokimyasal, anti-korozyon ve manyetik özellikleri açısından ilgi çekmiştir [1][2][3][4][5]. Ayrıca kobalt borüre yapılan çeşitli katkılar ile geliştirilen kompozit bileşiklerin ya da kobalt borür esaslı alaşımların daha iyi performans verdiği raporlanmıştır: Co -metal -bor alaşımları ya da Co borür esaslı kompozit nanopartiküller; hidrojen depolama uygulamalarında katalizör, manyetik malzeme ve korozyon ya da aşınma direnci yüksek kaplama malzemesi olarak kullanıma uygun görülmüştür [3][4][5].…”

Section: Giriş (Introduction)unclassified

The synthesis of binary and ternary cobalt based metal borides by inorganic molten salt technique

Altıntaş¹,

Khoshsima²,

Somer³

et al. 2020

Journal of Boron

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Kristalin metal borür tozları inorganik ergimiş tuz ortamında düşük sıcaklık yöntemi ile sentezlenmiş, ikili ve üçlü metal borür kompozit tozlarının eldesi susuz metal klorürler ve sodyum borhidrür toz karışımları kullanılarak incelenmiştir. Reaksiyonlar, argon altında dikey bir tüp fırında silika tüp içine yerleştirilmiş alüminyum pota içinde gerçekleştirilmiştir. Reaksiyon sonunda elde edilen toz karışımına sıcak su ile liç işlemi yapılarak istenmeyen klorür fazları giderilmiştir. Seçilen bazı saf tozlar, kristalin özelliği geliştirmek amacıyla 1100°C'de tavlama işlemine tabi tutulmuştur. Sentezlenen ve tavlanmış tozların karakterizasyonu, X-ışını difraktometresi (XRD), X-ışını floresans spektrometresi (XRF), taramalı elektron mikroskobu (SEM/EDX) ve dinamik ışık saçma tekniği (DLS) kullanılarak analiz edilmiştir. Sonuçlar, inorganik ergimiş tuz tekniğinin (LiCl/KCl ötektik karışımı) CoCl 2 , NiCl 2 ve NaBH 4 toz karışımları arasındaki reaksiyon sırasında oluşan fazlar üzerindeki olumlu etkisini ortaya koymuştur. 750-950°C sıcaklıkları arasında gerçekleşen reaksiyonlarda CoB-Ni 2 B-CoB x , CoB-Ni 4 B 3 ve CoB-NiB-Ni 2 Co 0.67 B 0.33 fazlarını içeren ikili ve üçlü metal borür tozları nano boyutta elde edilmiştir. Sentezlenen tozların partikül boyutu ortalama 60 nm civarında hesaplanmıştır.

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“…The nanoparticles synthesized using induction thermal plasma include oxide materials, boride materials, intermetallic compound materials, and lithium metal oxide. Accordingly, methods for controlling the particle size of nanoparticles have been reported [11][12][13][14][15][16]. Induction thermal plasma is better than conventional methods at producing morphologies, crystal structures, high-purity materials, and composite nanomaterials with chemical compositions that are normally difficult to obtain [17].…”

Section: Introductionmentioning

confidence: 99%

Thermal plasma synthesis and electrochemical properties of high-voltage LiNi_0.5Mn_1.5O₄ nanoparticles

Sone

Yoshida

Tanaka

et al. 2019

Mater. Res. Express

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The synthesis of LiNi 0.5 Mn 1.5 O 4 has been reported to change the crystal structure with the oxygen partial pressure and affect the battery characteristics. LiNi 0.5 Mn 1.5 O 4 involves the formation of impurities, such as Li x Ni 1−x O, Li x Mn 3−x O 4 , and Li 2 CO 3 , at a high temperature range exceeding 700°C because oxygen loss occurs during synthesis. LiNi 0.5 Mn 1.5 O 4 electrochemically contains Mn 4+ , however, Mn 3+ is formed because of oxygen deficiency. The Li-Ni-Mn-oxide causes a disproportionation of Mn 3+ in an oxygen-deficient state. The synthesized Li-Ni-Mn-oxide nanoparticles at 10,000 K by induction thermal plasma formed spinel-type LiNi 0.5 Mn 1.5 O 4 (space group Fd3m) of Mn 4+ . The crystal structure of the cubic-spinel nanoparticles approached a LiNi 0.5 Mn 1.5 O 4 single phase as the flow rate of O 2 increased from 2.5 to 5 l min −1 . The formation of LiNi 0.5 Mn 1.5 O 4 was shown to be accelerated by increasing the O 2 gas flow rate. The measured currentvoltage characteristics of LiNi 0.5 Mn 1.5 O 4 nanoparticles appeared at around 4.7-4.8 V as the reaction peak of Ni 2+ /Ni 3+ and Ni 3+ /Ni 4+ . In contrast, the Mn of the Li-Ni-Mn-oxide nanoparticles synthesized in the oxygen-deficient state was less than trivalent, which caused disproportionation of Mn. The measured current-voltage characteristics showed peak of an oxygen desorption at near 4.6 V. This study investigated the factors affecting the crystal structure formation and electrochemical properties of high-voltage LiNi 0.5 Mn 1.5 O 4 nanoparticles formed in thermal plasma.

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Synthesis of cobalt boride nanoparticles using RF thermal plasma

Cited by 38 publications

References 23 publications

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

The synthesis of binary and ternary cobalt based metal borides by inorganic molten salt technique

Thermal plasma synthesis and electrochemical properties of high-voltage LiNi_0.5Mn_1.5O₄ nanoparticles

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Synthesis of cobalt boride nanoparticles using RF thermal plasma

Cited by 38 publications

References 23 publications

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

Laser Deposited Nanostructured Thin Film Catalyst of Cobalt Oxide for Hydrogen Generation

The synthesis of binary and ternary cobalt based metal borides by inorganic molten salt technique

Thermal plasma synthesis and electrochemical properties of high-voltage LiNi0.5Mn1.5O4 nanoparticles

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Product

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Thermal plasma synthesis and electrochemical properties of high-voltage LiNi_0.5Mn_1.5O₄ nanoparticles