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.

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

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

Boosted Oxygen Evolution Reactivity via Atomic Iron Doping in Cobalt Carbonate Hydroxide Hydrate

2020 ◽  
Vol 12 (36) ◽  
pp. 40220-40228
Author(s):  
Shan Zhang ◽  
Bolong Huang ◽  
Liguang Wang ◽  
Xiaoyan Zhang ◽  
Haishuang Zhu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Iron Doping ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Hydroxide Hydrate

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.

scholarly journals Engineering Ternary Copper-Cobalt Sulfide Nanosheets as High-performance Electrocatalysts toward Oxygen Evolution Reaction

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 459 ◽  
Author(s):  
Heng Luo ◽  
Hang Lei ◽  
Yufei Yuan ◽  
Yongyin Liang ◽  
Yi Qiu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Noble Metal ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Active Sites ◽  
High Performance ◽  
Rational Design ◽  
Renewable Energy Sources ◽  
Cobalt Sulfide ◽  
Carbon Cloth

The rational design and development of the low-cost and effective electrocatalysts toward oxygen evolution reaction (OER) are essential in the storage and conversion of clean and renewable energy sources. Herein, a ternary copper-cobalt sulfide nanosheets electrocatalysts (denoted as CuCoS/CC) for electrochemical water oxidation has been synthesized on carbon cloth (CC) via the sulfuration of CuCo-based precursors. The obtained CuCoS/CC reveals excellent electrocatalytic performance toward OER in 1.0 M KOH. It exhibits a particularly low overpotential of 276 mV at current density of 10 mA cm−2, and a small Tafel slope (58 mV decade−1), which is superior to the current commercialized noble-metal electrocatalysts, such as IrO2. Benefiting from the synergistic effect of Cu and Co atoms and sulfidation, electrons transport and ions diffusion are significantly enhanced with the increase of active sites, thus the kinetic process of OER reaction is boosted. Our studies will serve as guidelines in the innovative design of non-noble metal electrocatalysts and their application in electrochemical water splitting

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

scholarly journals Comparative Electrocatalytic Oxygen Evolution Reaction Studies of Spinel NiFe2O4 and Its Nanocarbon Hybrids

2021 ◽  
Author(s):  
Pratik V. Shinde ◽  
Rutuparna Samal ◽  
Chandra Sekhar Rout
Keyword(s):  
Graphene Oxide ◽  
Oxygen Evolution ◽  
Current Density ◽  
Transition Metal Oxides ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
A Current

AbstractElectrocatalytic oxygen evolution reaction (OER) is one of the crucial reactions for converting renewable electricity into chemical fuel in the form of hydrogen. To date, there is still a challenge in designing ideal cost-effective OER catalysts with excellent activity and robust durability. The hybridization of transition metal oxides and carbonaceous materials is one of the most effective and promising strategies to develop high-performance electrocatalysts. Herein, this work synthesized hybrids of NiFe2O4 spinel materials with two-dimensional (2D) graphene oxide and one-dimensional (1D) carbon nanotubes using a facile solvothermal approach. Electrocatalytic activities of NiFe2O4 with 2D graphene oxide toward OER were realized to be superior even to the 1D carbon nanotube-based electrocatalyst in terms of overpotential to reach a current density of 10 mA/cm2 as well as Tafel slopes. The NiFe2O4 with 2D graphene oxide hybrid exhibits good stability with an overpotential of 327 mV at a current density of 10 mA/cm2 and a Tafel slope of 103 mV/dec. The high performance of NiFe2O4 with 2D graphene oxide is mainly attributed to its unique morphology, more exposed active sites, and a porous structure with a high surface area. Thus, an approach of hybridizing a metal oxide with a carbonaceous material offers an attractive platform for developing an efficient electrocatalyst for water electrochemistry applications.

Nickel iron carbonate hydroxide hydrate decorated with CeOx for highly efficient oxygen evolution reaction

2019 ◽  
Vol 23 (12) ◽  
pp. 3449-3458 ◽  
Author(s):  
Jinhua Cai ◽  
Jiangen Huang ◽  
Shichen Xu ◽  
Ling Yuan ◽  
Xueren Huang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Iron Carbonate ◽  
Nickel Iron ◽  
Highly Efficient ◽  
Carbonate Hydroxide ◽  
Hydroxide Hydrate
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