Transition-Metal-Substituted Cobalt Carbonate Hydroxide Nanostructures as Electrocatalysts in Alkaline Oxygen Evolution Reaction

2020 ◽  
Vol 3 (8) ◽  
pp. 7335-7344
Author(s):  
Ayon Karmakar ◽  
Suneel Kumar Srivastava
Keyword(s):  
Transition Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide

scholarly journals Facile Synthesis of Carbon Cloth Supported Cobalt Carbonate Hydroxide Hydrate Nanoarrays for Highly Efficient Oxygen Evolution Reaction

2021 ◽  
Vol 9 ◽  
Author(s):  
Yubing Yan
Keyword(s):  
Electron Microscopy ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Carbon Cloth ◽  
High Porosity ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Hydroxide Hydrate

Developing efficient and low-cost replacements for noble metals as electrocatalysts for the oxygen evolution reaction (OER) remain a great challenge. Herein, we report a needle-like cobalt carbonate hydroxide hydrate (Co(CO3)0.5OH·0.11H2O) nanoarrays, which in situ grown on the surface of carbon cloth through a facile one-step hydrothermal method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations demonstrate that the Co(CO3)0.5OH nanoarrays with high porosity is composed of numerous one-dimensional (1D) nanoneedles. Owing to unique needle-like array structure and abundant exposed active sites, the Co(CO3)0.5OH@CC only requires 317 mV of overpotential to reach a current density of 10 mA cm−2, which is much lower than those of Co(OH)2@CC (378 mV), CoCO3@CC (465 mV) and RuO2@CC (380 mV). For the stability, there is no significant attenuation of current density after continuous operation 27 h. This work paves a facile way to the design and construction of electrocatalysts for the OER.

Ag nanoparticles decorated urchin-like cobalt carbonate hydroxide composites for highly efficient oxygen evolution reaction

2020 ◽  
Vol 31 (47) ◽  
pp. 475402
Author(s):  
Wei Wang ◽  
Sainan Zhu ◽  
Xingliang Chen ◽  
Xinyu Zhang ◽  
Yourong Tao ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Ag Nanoparticles ◽  
Cobalt Carbonate ◽  
Highly Efficient ◽  
Carbonate Hydroxide

Cobalt carbonate hydroxide superstructures for oxygen evolution reactions

2017 ◽  
Vol 53 (57) ◽  
pp. 8010-8013 ◽  
Author(s):  
Simin Zhang ◽  
Bing Ni ◽  
Haoyi Li ◽  
Haifeng Lin ◽  
Huihui Zhu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Cobalt Hydroxide ◽  
Facile Hydrothermal Method ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Reaction Performance

A novel 3D superstructure of cobalt hydroxide carbonate with excellent electrocatalytic oxygen evolution reaction performance has been synthesized via a facile hydrothermal method.

Cubic Nanostructures of Nickel–Cobalt Carbonate Hydroxide Hydrate as a High-Performance Oxygen Evolution Reaction Electrocatalyst in Alkaline and Near-Neutral Media

2020 ◽  
Vol 59 (22) ◽  
pp. 16690-16702 ◽  
Author(s):  
Kannimuthu Karthick ◽  
Sugumar Subhashini ◽  
Rishabh Kumar ◽  
Sridhar Sethuram Markandaraj ◽  
Muthukumar Muthu Teepikha ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Cobalt Carbonate ◽  
Nickel Cobalt ◽  
Carbonate Hydroxide ◽  
Neutral Media ◽  
Hydroxide Hydrate

Porous cobalt carbonate hydroxide nanospheres towards oxygen evolution reaction

2020 ◽  
pp. 128066
Author(s):  
Yi Jia ◽  
Ya-Nan Li ◽  
Zheng-Min Wang ◽  
Fu-Min Li ◽  
Pu-Jun Jin ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide

Graphene-Induced Growth of Co3O4 Nanoplates with Modulable Oxygen Vacancies for Improved OER Properties

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xinheng Li ◽  
Lei Qi ◽  
Mei Wang
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Hydrothermal Treatment ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
Transition Metal Oxide ◽  
Oxide Hydroxide

Transition metal oxide/ hydroxide is intensively studied for oxygen evolution reaction (OER). Herein, graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies via hydrothermal treatment is reported. With the increase...

scholarly journals The Effect of Iron Impurities on Transition Metal Catalysts for the Oxygen Evolution Reaction in Alkaline Environment: Activity Mediators or Active Sites?

2020 ◽  
Author(s):  
Ioannis Spanos ◽  
Justus Masa ◽  
Aleksandar Zeradjanin ◽  
Robert Schlögl
Keyword(s):  
Transition Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Water Electrolysis ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Alkaline Water Electrolysis ◽  
Co Catalysts ◽  
Model Transition

AbstractThere is an ongoing debate on elucidating the actual role of Fe impurities in alkaline water electrolysis, acting either as reactivity mediators or as co-catalysts through synergistic interaction with the main catalyst material. This perspective summarizes the most prominent oxygen evolution reaction (OER) mechanisms mostly for Ni-based oxides as model transition metal catalysts and highlights the effect of Fe incorporation on the catalyst surface in the form of impurities originating from the electrolyte or co-precipitated in the catalyst lattice, in modulating the OER reaction kinetics, mechanism and stability. Graphic Abstract

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