Customised transition metal oxide nanoparticles for the controlled production of carbon nanostructures

RSC Advances ◽  
2012 ◽  
Vol 2 (9) ◽  
pp. 3748 ◽  
Author(s):  
Karl Mandel ◽  
Frank Dillon ◽  
Antal A. Koos ◽  
Zabeada Aslam ◽  
Frank Cullen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Carbon Nanostructures ◽  
Metal Oxide Nanoparticles ◽  
Transition Metal Oxide ◽  
Oxide Nanoparticles

Ternary Transition Metal Oxide Nanoparticles with Spinel Structure for the Oxygen Reduction Reaction

2015 ◽  
Vol 2 (7) ◽  
pp. 982-987 ◽  
Author(s):  
Rou Jun Toh ◽  
Alex Yong Sheng Eng ◽  
Zdenek Sofer ◽  
David Sedmidubsky ◽  
Martin Pumera
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Spinel Structure ◽  
Metal Oxide Nanoparticles ◽  
Transition Metal Oxide ◽  
Reduction Reaction ◽  
Oxide Nanoparticles

Facile synthesis of diverse transition metal oxide nanoparticles and electrochemical properties

2016 ◽  
Vol 3 (8) ◽  
pp. 1048-1057 ◽  
Author(s):  
Hao Zhang ◽  
Xiaofeng Wang ◽  
Chengcheng Chen ◽  
Cuihua An ◽  
Yanan Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Electrochemical Properties ◽  
Metal Oxide Nanoparticles ◽  
Transition Metal Oxide ◽  
Oxide Nanoparticles ◽  
Facile Synthesis

Four diverse metal oxide nanoparticles are synthesized successfully and CoO nano-cubes show excellent electrochemical properties.

scholarly journals Tuning the Magnetic Moment of Small Late 3d-Transition-Metal Oxide Clusters by Selectively Mixing the Transition-Metal Constituents

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1814
Author(s):  
Rodrigo H. Aguilera-del-Toro ◽  
María B. Torres ◽  
Faustino Aguilera-Granja ◽  
Andrés Vega
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Magnetic Moment ◽  
Density Functional ◽  
Magnetic Moments ◽  
Metal Oxide Nanoparticles ◽  
Transition Metal Oxide ◽  
Blocking Temperature ◽  
Oxide Nanoparticles ◽  
Oxidation Rates

Transition-metal oxide nanoparticles are relevant for many applications in different areas where their superparamagnetic behavior and low blocking temperature are required. However, they have low magnetic moments, which does not favor their being turned into active actuators. Here, we report a systematical study, within the framework of the density functional theory, of the possibility of promoting a high-spin state in small late-transition-metal oxide nanoparticles through alloying. We investigated all possible nanoalloys An−xBxOm (A, B = Fe, Co, Ni; n = 2, 3, 4; 0≤x≤n) with different oxidation rates, m, up to saturation. We found that the higher the concentration of Fe, the higher the absolute stability of the oxidized nanoalloy, while the higher the Ni content, the less prone to oxidation. We demonstrate that combining the stronger tendency of Co and Ni toward parallel couplings with the larger spin polarization of Fe is particularly beneficial for certain nanoalloys in order to achieve a high total magnetic moment, and its robustness against oxidation. In particular, at high oxidation rates we found that certain FeCo oxidized nanoalloys outperform both their pure counterparts, and that alloying even promotes the reentrance of magnetism in certain cases at a critical oxygen rate, close to saturation, at which the pure oxidized counterparts exhibit quenched magnetic moments.

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