Synthesis of mesoporous Co–B alloy in room-temperature ionic liquids and its electrochemical properties

Nanoscaled Metal Borides and Phosphides: Recent Developments and Perspectives

“…The authors used ethylenediamine as growth directing agent during the reduction of cobalt acetate by KBH 4 in a basic aqueous solution. Ionic liquids can also orient the formation of the solid toward a mesoporous network of Co–B …”

“…First tests performed by Mitov et al , and Wang et al tended to confirm this view. Some reports are still considering the formation of metal boron hydrides as plausible, ,,, but recent works ,, nicely reviewed by Zhao et al lead to the current consensus that hydrogen sorption has only a minor contribution to energy storage. Indeed, crystalline cobalt borides Co 3 B, Co 2 B , and CoB , have also good capacity and cycling stability, even if they do not show any significant hydrogen sorption. ,, Although differences between amorphous and crystalline metal borides both in terms of crystal structure and particle size/surface area hinder direct comparison of their performances (ranging between 250 and 350 mA h g –1 after 100 cycles), the common mechanism seems to be similar to the oxidation–reduction process described above for boron-rich metal borides in primary alkaline batteries.…”

“…Ionic liquids can also orient the formation of the solid toward a mesoporous network of Co− B. 550 External stimuli can also be used, such as magnetic field for preferential growth of Co−B nanowires. 551 3.8.5.…”

Preparation of porous nitrogen-doped titanium dioxide microspheres and a study of their photocatalytic, antibacterial and electrochemical activities

“…Even at 20 C, the N-TiO 2 -60 still maintained a capacity of 120 mAh g À1 . Meanwhile, the better rate behavior of the TiO 2 microsphere precursor compared to that of P25 should be attributed to the porous structure, which reduces the diffusion lengths for the electrolyte ions and ensures that sufficient electrochemical reactions can take place at high current rates [39][40][41][42][43][44][45]. Furthermore, as the rate is reduced from 20 C to 1 C, the difference in capacity vanishes (Fig.…”

CoB Ön Alaşımlarının Alüminotermik Redüksiyon Yöntemiyle Üretilmesi ve Termokimyasal Modellenmesi

“…Son yıllarda, geçiş metali borürlerinden biri olan CoB'nin nikel bazlı ikincil pillerde, yüksek deşarj kapasitesi ve mükemmel çevrim performansı sayesinde sıklıkla bir anot malzemesi olarak kullanıldığı literatürde görülmektedir [5][6][7][8][9]. Öte yandan, birçok araştırmacı CoB alaşımlarının alkali ortamda yüksek deşarj kapasitesi gösterdiğini, bu yüksek enerji yoğunluğunun anotlarda kullanım imkânı sunduğunu ve bor hidrürlerinin hidrolizi yoluyla hidrojen üretimi için katalizörler olarak kullanılabileceğini göstermiştir [6][7][8][9][10].…”