Enhanced electrocatalytic performance of mesoporous nickel-cobalt oxide electrode for methanol oxidation in alkaline solution

2017 ◽  
Vol 196 ◽  
pp. 365-368 ◽  
Author(s):  
Prabhakarn Arunachalam ◽  
Mohamed A. Ghanem ◽  
Abdullah M. Al-Mayouf ◽  
Matar Al-shalwi
Keyword(s):  
Cobalt Oxide ◽  
Methanol Oxidation ◽  
Alkaline Solution ◽  
Oxide Electrode ◽  
Nickel Cobalt ◽  
Electrocatalytic Performance ◽  
Nickel Cobalt Oxide

scholarly journals Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3918
Author(s):  
Anna Dymerska ◽  
Wojciech Kukułka ◽  
Marcin Biegun ◽  
Ewa Mijowska
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Active Sites ◽  
Solvothermal Reaction ◽  
Step Method ◽  
One Pot ◽  
Widespread Application ◽  
Nickel Cobalt ◽  
Slow Kinetics ◽  
Nickel Cobalt Oxide

The renewable energy technologies require electrocatalysts for reactions, such as the oxygen and/or hydrogen evolution reaction (OER/HER). They are complex electrochemical reactions that take place through the direct transfer of electrons. However, mostly they have high over-potentials and slow kinetics, that is why they require electrocatalysts to lower the over-potential of the reactions and enhance the reaction rate. The commercially used catalysts (e.g., ruthenium nanoparticles—Ru, iridium nanoparticles—Ir, and their oxides: RuO2, IrO2, platinum—Pt) contain metals that have poor stability, and are not economically worthwhile for widespread application. Here, we propose the spinel structure of nickel-cobalt oxide (NiCo2O4) fabricated to serve as electrocatalyst for OER. These structures were obtained by a facile two-step method: (1) One-pot solvothermal reaction and subsequently (2) pyrolysis or carbonization, respectively. This material exhibits novel rod-like morphology formed by tiny spheres. The presence of transition metal particles such as Co and Ni due to their conductivity and electron configurations provides a great number of active sites, which brings superior electrochemical performance in oxygen evolution and good stability in long-term tests. Therefore, it is believed that we propose interesting low-cost material that can act as a super stable catalyst in OER.

Nickel Cobalt Oxide Nanoneedles for Electrochromic Glucose Sensors

2021 ◽  
Vol 4 (2) ◽  
pp. 2143-2152 ◽  
Author(s):  
Devesh K. Pathak ◽  
Anjali Chaudhary ◽  
Manushree Tanwar ◽  
Uttam K. Goutam ◽  
Puspen Mondal ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Glucose Sensors ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide
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