Biocarbon-templated synthesis of porous Ni–Co-O nanocomposites for room-temperature NH3 sensors

2018 ◽  
Vol 42 (21) ◽  
pp. 17606-17614 ◽  
Author(s):  
Huan Liu ◽  
He Lv ◽  
Kan Kan ◽  
Yang Liu ◽  
Weijun Zhang ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Room Temperature ◽  
Templated Synthesis ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide

Mesoporous nickel–cobalt oxide (Ni–Co-O) nanocomposites were fabricated using a mesoporous biocarbon material (BCM), resulting from hemp stem, as a template.

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

scholarly journals Back-Illuminated Si-Based Photoanode with Nickel Cobalt Oxide Catalytic Protection Layer

2016 ◽  
Vol 3 (10) ◽  
pp. 1517-1517 ◽  
Author(s):  
Dowon Bae ◽  
Bastian Mei ◽  
Rasmus Frydendal ◽  
Thomas Pedersen ◽  
Brian Seger ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide ◽  
Protection Layer ◽  
Back Illuminated

scholarly journals Evaluation of sputtered nickel oxide, cobalt oxide and nickel–cobalt oxide on n-type silicon photoanodes for solar-driven O2(g) evolution from water

2020 ◽  
Vol 8 (28) ◽  
pp. 13955-13963 ◽  
Author(s):  
Fan Yang ◽  
Xinghao Zhou ◽  
Noah T. Plymale ◽  
Ke Sun ◽  
Nathan S. Lewis
Keyword(s):  
Thin Films ◽  
Nickel Oxide ◽  
Cobalt Oxide ◽  
Water Oxidation ◽  
Type Silicon ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide

Thin films of nickel oxide (NiOx), cobalt oxide (CoOx) and nickel–cobalt oxide (NiCoOx) produced integrated, protected Si (111) photoanodes integrated, protected Si photoanodes that did not require deposition of a separate heterogeneous electrocatalyst for water oxidation.

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