Effect of thermal treatment on mechanically milled cobalt powder

Bolokang, A.S.; Phasha, M.J.; Camagu, S.T.; Motaung, David E.; Bhero, Shepherd

doi:10.1016/j.ijrmhm.2011.11.010

Cited by 18 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, it is interesting to note that hexagonal cobalt metal is catalytically higher active than the face‐centered cobalt phase. [ 41–44 ] Earlier, the hexagonal phase of Co has been synthesized via calcination of Co (II) phenanthroline in presence of NaCl crystals. [ 44 ] The effect of the heating rate on the morphology of Co 3 O 4 nanostructure was studied at 50, 100, 200, and 300 °C h −1 with calcination temperature (300 °C h −1 ).…”

Section: Resultsmentioning

confidence: 99%

Structurally Engineered Anisotropic Cobalt‐Based Nanostructures for Efficient Chlorine and Oxygen Evolution

Rana

Yadav²,

Sunaina³

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

Electrochemical Cl2 generation using inexpensive electrocatalysis has drawn tremendous scientific attention to meet the future demand for chlorine. The present work deals with the design of the chemical process to synthesize anisotropically aligned metallic hcp‐cobalt nanoparticles. The as‐obtained hcp‐cobalt rods are utilized for the generation of O2 and Cl2 via an electrochemical process. Controlling the thermodynamic parameters during the thermal decomposition of cobalt oxalate rods leads to the formation of aligned nanoparticles. Detailed microscopic investigation shows that the slow heating rate favors the anisotropic growth of nanoparticles, and the fast‐heating rate leads to the formation of agglomerated nanoparticles. Anisotropically aligned hcp‐Co rods show an overpotential of 240 and 30 mV for O2 and Cl2 evolution, respectively. These findings elaborate that aligned particles (rod‐like structures) show promising electrocatalysts with better efficiency for O2 and Cl2 generation. Further, wastewater treatment is done by using in situ generated chlorine and 99% degradation efficiency is observed for textile effluents (methyl orange).

show abstract

Section: Resultsmentioning

confidence: 99%

Structurally Engineered Anisotropic Cobalt‐Based Nanostructures for Efficient Chlorine and Oxygen Evolution

Rana

Yadav²,

Sunaina³

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…High-energy MA, as a typical powder metallurgy process, involves the repeated fracturing, cold-welding, and re-fracturing of powder particles in a high-energy ball mill. MA process has demonstrated favorable capabilities in the formation of stable and metastable phases including solid solutions [7,8], intermediate phases [9,10], and even amorphous alloys [11,12]. In particular, during MA process the powders being milled undergo heavy macroscopic and microscopic deformations due to the continuous action of ball-powder-ball collisions, which provides a high possibility for the formation of nanocrystallites in as-milled powders [13][14][15].…”

Section: Introductionmentioning

confidence: 99%