Hierarchical porous Fe3O4/Co3S4 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

2017 ◽  
Vol 5 (19) ◽  
pp. 9210-9216 ◽  
Author(s):  
Jing Du ◽  
Ting Zhang ◽  
Jiale Xing ◽  
Cailing Xu
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Tafel Slope ◽  
Hierarchical Porous ◽  
A Current

A hierarchical porous Fe3O4/Co3S4 nanosheet composite was synthesized and it needed an overpotential of only 270 mV to achieve a current density of 10 mA cm−2 and afforded a small Tafel slope of about 56 mV dec−1.

Hierarchical Fe-doped Ni3Se4 ultrathin nanosheets as an efficient electrocatalyst for oxygen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 5163-5170 ◽  
Author(s):  
Jing Du ◽  
Zehua Zou ◽  
Chen Liu ◽  
Cailing Xu
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Solvothermal Synthesis ◽  
Ni Foam ◽  
Tafel Slope ◽  
Ultrathin Nanosheets ◽  
Selenization Process ◽  
A Current

Hierarchical Fe-doped Ni3Se4 ultrathin nanosheets are synthesized via solvothermal synthesis and a topotactic selenization process. The prepared (Ni,Fe)3Se4 ultrathin nanosheets supported on Ni foam needed an overpotential of only 225 mV to achieve a current density of 10 mA cm−2 and a small Tafel slope of about 41 mV dec−1.

Hierarchical NiFeP microflowers directly grown on Ni foam for efficient electrocatalytic oxygen evolution

2017 ◽  
Vol 5 (22) ◽  
pp. 11229-11235 ◽  
Author(s):  
Jiahao Yu ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Ni Foam ◽  
Hierarchical Porous ◽  
A Current ◽  
The Way

3D hierarchical porous ternary (NixFe1−x)2P microflowers grown on Ni foam exhibit excellent electrocatalytic activity toward the oxygen evolution reaction with an exceptional overpotential of 219 mV at a current density of 20 mA cm−2 in 1 M KOH and superior stability. This work paves the way to design and synthesize other TMPs for more applications.

Cu3N nanowire array as a high-efficiency and durable electrocatalyst for oxygen evolution reaction

2019 ◽  
Vol 48 (16) ◽  
pp. 5131-5134 ◽  
Author(s):  
Huanmei Guo ◽  
Li Liu ◽  
Qian Wu ◽  
Limin Li ◽  
Xishi Tai
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Nanowire Array ◽  
Copper Foam ◽  
A Current

A self-supported Cu3N nanowire array on copper foam (Cu3N NA/CF) exhibits marvellous OER activity with the need of an overpotential of only 298 mV at a current density of 20 mA cm−2 in 1.0 M KOH.

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.

An Fe(TCNQ)2 nanowire array on Fe foil: an efficient non-noble-metal catalyst for the oxygen evolution reaction in alkaline media

2018 ◽  
Vol 54 (18) ◽  
pp. 2300-2303 ◽  
Author(s):  
Maowen Xie ◽  
Xiaoli Xiong ◽  
Lin Yang ◽  
Xifeng Shi ◽  
Abdullah M. Asiri ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Nanowire Array ◽  
Alkaline Media ◽  
Metal Catalyst ◽  
Noble Metal Catalyst ◽  
A Current

An Fe-(tetracyanoquinodimethane)2 nanowire array in situ developed on Fe foil (Fe(TCNQ)2/Fe) acts as an efficient and durable electrocatalyst for water oxidation, needing an overpotential of 340 mV to attain a current density of 10 mA cm−2 in 1.0 M KOH.

NiSe2/FeSe2nanodendrites: a highly efficient electrocatalyst for oxygen evolution reaction

2017 ◽  
Vol 7 (20) ◽  
pp. 4604-4608 ◽  
Author(s):  
Yeshuang Du ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Synergistic Effect ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
3D Structure ◽  
Synthetic Approach ◽  
Fe Doping ◽  
Highly Efficient ◽  
A Current

NiSe2/FeSe2nanodendrites have been synthesized through a facile colloidal synthetic approach. Thanks to its unique 3D structure with branched architectures and the synergistic effect after Fe doping, the resulting Ni0.5Fe0.5Se2catalyst exhibits superior OER activity with an overpotential of 235 mV at a current density of 10 mA cm−2.

3D hierarchical Co3O4@Co3S4 nanoarrays as anode and cathode materials for oxygen evolution reaction and hydrogen evolution reaction

2018 ◽  
Vol 47 (45) ◽  
pp. 16305-16312 ◽  
Author(s):  
Xiaoqiang Du ◽  
Hui Su ◽  
Xiaoshuang Zhang
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Cathode Materials ◽  
Oxygen Evolution Reaction ◽  
Cell Voltage ◽  
A Current

Using Co3O4@Co3S4-24 h as a bifunctional water splitting catalyst, an overpotential of ∼300 mV is obtained at a very low cell voltage of 1.53 V with a current density of 10 mA cm−2 in 1.0 M KOH.

scholarly journals Robust Carbon-Stabilization of Few-Layer Black Phosphorus for Superior Oxygen Evolution Reaction

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 695 ◽  
Author(s):  
Mengjie Zhang ◽  
Wenchang Zhu ◽  
Xingzhe Yang ◽  
Meng Feng ◽  
Hongbin Feng
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Black Phosphorus ◽  
Carbon Stabilization ◽  
High Durability ◽  
Carbon Coated ◽  
Alkaline Conditions ◽  
Doped Graphene ◽  
A Current

Few-layer exfoliated black phosphorus (Ex-BP) has attracted tremendous attention owing to its promising applications, including in electrocatalysis. However, it remains a challenge to directly use few-layer Ex-BP as oxygen-involved electrocatalyst because it is quite difficult to restrain structural degradation caused by spontaneous oxidation and keep it stable. Here, a robust carbon-stabilization strategy has been implemented to prepare carbon-coated Ex-BP/N-doped graphene nanosheet (Ex-BP/NGS@C) nanostructures at room temperature, which exhibit superior oxygen evolution reaction (OER) activity under alkaline conditions. Specifically, the as-synthesized Ex-BP/NGS@C hybrid presents a low overpotential of 257 mV at a current density of 10 mA cm−2 with a small Tafel slope of 52 mV dec−1 and shows high durability after long-term testing.

Enhanced oxygen evolution catalytic activity of NiS2 by coupling with ferrous phosphite and phosphide

2021 ◽  
Vol 5 (6) ◽  
pp. 1801-1808
Author(s):  
Jie Yu ◽  
Tao Zhang ◽  
Changchang Xing ◽  
Xuejiao Li ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Tafel Slope ◽  
Low Overpotential

NiS2/Fe-P nanospheres were developed as an efficient oxygen evolution reaction electrocatalyst with a low overpotential (218 mV @ 10 mA cm−2 and 306 mV @ 800 mA cm−2) and Tafel slope (47.5 mV dec−1).

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.

Sign in / Sign up

Export Citation Format

Share Document