scholarly journals The Effect of Heteroatom Doping on Nickel Cobalt Oxide Electrocatalysts for Oxygen Evolution and Reduction Reactions

ChemPlusChem ◽  
2020 ◽  
Vol 85 (8) ◽  
pp. 1710-1718
Author(s):  
Celia Belkessam ◽  
Selma Bencherif ◽  
Mourad Mechouet ◽  
Naima Idiri ◽  
Jalal Ghilane
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Heteroatom Doping ◽  
Reduction Reactions ◽  
Nickel Cobalt ◽  
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 nanowires with iron incorporation realizing a promising electrocatalytic oxygen evolution reaction

2020 ◽  
Vol 31 (43) ◽  
pp. 435707
Author(s):  
Zewei Hao ◽  
Pengkun Wei ◽  
Hongzhi Kang ◽  
Yang Yang ◽  
Jing Li ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxide Nanowires ◽  
Iron Incorporation ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide

scholarly journals Nickel cobalt oxide hollow nanosponges as advanced electrocatalysts for the oxygen evolution reaction

2015 ◽  
Vol 51 (37) ◽  
pp. 7851-7854 ◽  
Author(s):  
Chengzhou Zhu ◽  
Dan Wen ◽  
Susanne Leubner ◽  
Martin Oschatz ◽  
Wei Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Nickel Cobalt ◽  
Kinetically Controlled ◽  
Nickel Cobalt Oxide

Nickel cobalt oxide hollow nanosponges were synthesized through a kinetically controlled strategy, which exhibited excellent catalytic activity towards oxygen evolution reaction.

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