scholarly journals Facile Synthesis of Copper Oxide-Cobalt Oxide/Nitrogen-Doped Carbon (Cu2O-Co3O4/CN) Composite for Efficient Water Splitting

2021 ◽  
Vol 11 (21) ◽  
pp. 9974
Author(s):  
Zaffar Ahmed Shaikh ◽  
Nikita Moiseev ◽  
Alexey Mikhaylov ◽  
Serhat Yüksel
Keyword(s):  
Copper Oxide ◽  
Cobalt Oxide ◽  
Water Splitting ◽  
Water Oxidation ◽  
Linear Sweep Voltammetry ◽  
Electrochemical Catalysis ◽  
Onset Potential ◽  
Nitrogen Doped ◽  
Electrochemical Water Splitting ◽  
Nitrogen Doped Carbon

Herein, we report a copper oxide-cobalt oxide/nitrogen-doped carbon hybrid (Cu2O-Co3O4/CN) composite for electrochemical water splitting. Cu2O-Co3O4/CN is synthesized by an easy two-step reaction of melamine with Cu2O-Co3O4/CN composite. The designed composite is aimed to solve energy challenges by producing hydrogen and oxygen via electrochemical catalysis. The proposed composite offers some unique advantages in water splitting. Carbon imparts superior conductivity, while the water oxidation abilities of Cu2O and Co3O4 are considered to constitute a catalyst. The synthesized composite (Cu2O-Co3O4/CN) is characterized by SEM, EDS, FTIR, TEM, and AFM in terms of the size, morphology, shape, and elemental composition of the catalyst. The designed catalyst’s electrochemical performance is evaluated via linear sweep voltammetry (LSV) and cyclic voltammetry (CV). The Cu2O-Co3O4/CN composite shows significant electrocatalytic activity, which is further improved by introducing nitrogen doped carbon (current density 10 mA cm−2, onset potential 91 mV, and overpotential 396 mV).

scholarly journals Fe(III) Ions-Assisted Aniline Polymerization Strategy to Nitrogen-Doped Carbon-Supported Bimetallic CoFeP Nanospheres as Efficient Bifunctional Electrocatalysts toward Overall Water Splitting

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1473
Author(s):  
Changhao Zhao ◽  
Fen Wei ◽  
Haolin Lv ◽  
Dengke Zhao ◽  
Nan Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Active Sites ◽  
Alkaline Media ◽  
Alkaline Electrolyte ◽  
Nitrogen Doped ◽  
Overall Water Splitting ◽  
Electrochemical Water Splitting ◽  
Acidic And Alkaline Media ◽  
Aniline Polymerization

It remains an urgent demand and challenging task to design and fabricate efficient, stable, and inexpensive catalysts toward sustainable electrochemical water splitting for hydrogen production. Herein, we explored the use of Fe(III) ion-assisted aniline polymerization strategy to embed bimetallic CoFeP nanospheres into the nitrogen-doped porous carbon framework (referred CoFeP-NC). The as-prepared CoFeP-NC possesses excellent hydrogen evolution reaction (HER) performance with the small overpotential (η10) of 81 mV and 173 mV generated at a current density of 10 mA cm−2 in acidic and alkaline media, respectively. Additionally, it can also efficiently catalyze water oxidation (OER), which shows an ideal overpotential (η10) of 283 mV in alkaline electrolyte (pH = 14). The remarkable catalytic property of CoFeP-NC mainly stems from the strong synergetic effects of CoFeP nanospheres and carbon network. On the one hand, the interaction between the two can make better contact between the electrolyte and the catalyst, thereby providing a large number of available active sites. On the other hand, it can also form a network to offer better durability and electrical conductivity (8.64 × 10−1 S cm−1). This work demonstrates an efficient method to fabricate non-noble electrocatalyst towards overall water splitting, with great application prospect.

scholarly journals Liquid-Phase Deposition Synthesis of ZIF-67-Derived Synthesis of Co3O4@TiO2 Composite for Efficient Electrochemical Water Splitting

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 420
Author(s):  
Zaffar Ahmed Shaikh ◽  
Asif Ali Laghari ◽  
Oleg Litvishko ◽  
Valery Litvishko ◽  
Tatyana Kalmykova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Metal Oxides ◽  
Water Splitting ◽  
Current Density ◽  
Linear Sweep Voltammetry ◽  
Pure Metal ◽  
Onset Potential ◽  
Force Microscopy ◽  
Transmission Electron ◽  
Electrochemical Water Splitting

In this article, a novel Co3O4@TiO2 composite is synthesized by applying two-step methods. ZIF-67 is synthesized and used as a template for the synthesis of the composite. The composite is designed by using the effective photocatalytic properties of Co3O4 and TiO2. The resulting synthesized composite is supposed to offer superior properties compared to their counterparts. The synthesized Co3O4@TiO2 composite is characterized by powder X-ray diffraction (PXRD), Brunauer–Emmet–Teller (BET), atomic force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Electrochemical water splitting, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) studies on the Co3O4@TiO2 composite, is evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) analysis in a 2M aqueous KOH electrolyte. The current generation stability of these samples is deliberated by chronoamperometric measurements. It is observed, from LSV results at a 1 mV/s scan rate, that metal oxides incorporated on other metal oxides have a higher current density and lower onset potential as compared to pure metal oxides. From the obtained results, it has become evident that synthesized studies on the Co3O4@TiO2 composite possess significant potential for electrochemical water splitting with the lowest onset potential, highest current density, better OER, and HER activity.

Electrochemical and photoelectrochemical water splitting with a CoOx catalyst prepared by flame assisted deposition

2020 ◽  
Vol 49 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Fusheng Li ◽  
Ziqi Zhao ◽  
Hao Yang ◽  
Dinghua Zhou ◽  
Yilong Zhao ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxide Catalyst ◽  
Photoelectrochemical Water Splitting ◽  
Deposition Method ◽  
Photoelectrochemical Water Oxidation

A cobalt oxide catalyst prepared by a flame-assisted deposition method on the surface of FTO and hematite for electrochemical and photoelectrochemical water oxidation, respectively.

High-active nanoplates of nitrogen-doped carbon@Mo2C as efficient catalysts in water splitting

2021 ◽  
Vol 279 ◽  
pp. 116847
Author(s):  
Siqin Jia ◽  
Qiguan Wang ◽  
Jian Chen ◽  
Sumin Wang
Keyword(s):  
Water Splitting ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Ethyl Benzene Oxidation under Aerobic Conditions using Cobalt Oxide Imbedded in Nitrogen-doped Carbon Fiber Felt Wrapped by Spiral TiO2-SiO2

2021 ◽  
pp. 118456
Author(s):  
Sayyed Mahdi Hosseini ◽  
Mehran Ghiaci ◽  
Sergei A. Kulinich ◽  
Wilfried Wunderlich ◽  
Hassan S. Ghaziaskar ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Cobalt Oxide ◽  
Ethyl Benzene ◽  
Benzene Oxidation ◽  
Aerobic Conditions ◽  
Nitrogen Doped ◽  
Carbon Fiber Felt ◽  
Nitrogen Doped Carbon

scholarly journals Catalytic and capacity properties of nanocomposites based on cobalt oxide and nitrogen-doped carbon nanofibers

2014 ◽  
Vol 35 (6) ◽  
pp. 960-969 ◽  
Author(s):  
Olga Yu. Podyacheva ◽  
Andrei I. Stadnichenko ◽  
Svetlana A. Yashnik ◽  
Olga A. Stonkus ◽  
Elena M. Slavinskaya ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Carbon Nanofibers ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon
Sign in / Sign up

Export Citation Format

Share Document