Homogenous electrochemical water oxidation by a nickel(ii) complex based on a macrocyclic N-heterocyclic carbene/pyridine hybrid ligand

2019 ◽  
Vol 9 (20) ◽  
pp. 5651-5659 ◽  
Author(s):  
Hossain M. Shahadat ◽  
Hussein A. Younus ◽  
Nazir Ahmad ◽  
Md. Abdur Rahaman ◽  
Zafar A. K. Khattak ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Water Oxidation ◽  
Catalytic Current ◽  
Pyridine Complex ◽  
Bulk Electrolysis ◽  
Catalytic Performances

Electrochemical water oxidation catalyzed by a homogeneous Ni–NHC/pyridine complex demonstrated electrolyte-dependent catalytic performances. The catalyst displayed a stable catalytic current of oxygen evolution in long-term bulk electrolysis.

scholarly journals Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4420
Author(s):  
Tse-Wei Chen ◽  
Palraj Kalimuthu ◽  
Ganesan Anushya ◽  
Shen-Ming Chen ◽  
Vinitha Mariyappan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Energy Demand ◽  
Recent Progress ◽  
Low Cost ◽  
Green Energy ◽  
Future Directions ◽  
Electrochemical Conversion ◽  
Synthetic Approaches ◽  
Catalytic Performances

Presently, the global energy demand for increasing clean and green energy consumption lies in the development of low-cost, sustainable, economically viable and eco-friendly natured electrochemical conversion process, which is a significant advancement in different morphological types of advanced electrocatalysts to promote their electrocatalytic properties. Herein, we overviewed the recent advancements in oxygen evolution reactions (OERs), including easy electrode fabrication and significant action in water-splitting devices. To date, various synthetic approaches and modern characterization techniques have effectively been anticipated for upgraded OER activity. Moreover, the discussed electrode catalysts have emerged as the most hopeful constituents and received massive appreciation in OER with low overpotential and long-term cyclic stability. This review article broadly confers the recent progress research in OER, the general mechanistic approaches, challenges to enhance the catalytic performances and future directions for the scientific community.

scholarly journals Tunable Eg Orbital Occupancy in Heusler Compounds for Oxygen Evolution Reaction

2020 ◽  
Author(s):  
Mingquan Yu ◽  
Guowei Li ◽  
Chenguang Fu ◽  
Enke Liu ◽  
Kaustuv Manna ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Heusler Compounds ◽  
Proof Of Concept ◽  
Catalytic Current ◽  
Compound A ◽  
Melting Method ◽  
New Class ◽  
Arc Melting ◽  
Catalytic Performances

Heusler compounds have great potential in electrocatalysis due to their mechanical robustness, metallic conductivity, and wide tunability in the electronic structure and element compositions. This study reports the first application of Co<sub>2</sub><i>YZ</i> type Heusler compounds as electrocatalysts towards oxygen evolution reaction (OER). A range of Co<sub>2</sub><i>YZ</i> crystals was synthesized through the arc-melting method and the <i>e</i><sub>g</sub> orbital filling of Co was precisely regulated by varying <i>Y</i> and <i>Z</i> sites of the compound. A strong correlation between the <i>e</i><sub>g</sub> orbital filling of reactive Co sites and OER activity was found on Co<sub>2</sub>MnZ compounds (Z = Ti, Al, V, and Ga) whereby higher catalytic current was achieved with <i>e</i><sub>g</sub> orbital filling approaching to unity. A similar trend of <i>e</i><sub>g</sub> orbital filling on the reactivity of cobalt sites was also observed for other set of Heusler compounds (Co<sub>2</sub>V<i>Z</i>, <i>Z</i> = Sn and Ga). This work demonstrates proof of concept of application of Heusler compounds as a new class of OER electrocatalyst and the influence of the manipulation of the spin orbitals on their catalytic performances.

scholarly journals Tunable Eg Orbital Occupancy in Heusler Compounds for Oxygen Evolution Reaction

2020 ◽  
Author(s):  
Mingquan Yu ◽  
Guowei Li ◽  
Chenguang Fu ◽  
Enke Liu ◽  
Kaustuv Manna ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Heusler Compounds ◽  
Proof Of Concept ◽  
Catalytic Current ◽  
Compound A ◽  
Melting Method ◽  
New Class ◽  
Arc Melting ◽  
Catalytic Performances

Heusler compounds have great potential in electrocatalysis due to their mechanical robustness, metallic conductivity, and wide tunability in the electronic structure and element compositions. This study reports the first application of Co<sub>2</sub><i>YZ</i> type Heusler compounds as electrocatalysts towards oxygen evolution reaction (OER). A range of Co<sub>2</sub><i>YZ</i> crystals was synthesized through the arc-melting method and the <i>e</i><sub>g</sub> orbital filling of Co was precisely regulated by varying <i>Y</i> and <i>Z</i> sites of the compound. A strong correlation between the <i>e</i><sub>g</sub> orbital filling of reactive Co sites and OER activity was found on Co<sub>2</sub>MnZ compounds (Z = Ti, Al, V, and Ga) whereby higher catalytic current was achieved with <i>e</i><sub>g</sub> orbital filling approaching to unity. A similar trend of <i>e</i><sub>g</sub> orbital filling on the reactivity of cobalt sites was also observed for other set of Heusler compounds (Co<sub>2</sub>V<i>Z</i>, <i>Z</i> = Sn and Ga). This work demonstrates proof of concept of application of Heusler compounds as a new class of OER electrocatalyst and the influence of the manipulation of the spin orbitals on their catalytic performances.

Electrochemically activated-iron oxide nanosheet arrays on carbon fiber cloth as a three-dimensional self-supported electrode for efficient water oxidation

2016 ◽  
Vol 4 (16) ◽  
pp. 6048-6055 ◽  
Author(s):  
Feng Yan ◽  
Chunling Zhu ◽  
Shuo Wang ◽  
Yang Zhao ◽  
Xitian Zhang ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Carbon Fiber ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Three Dimensional ◽  
Long Term Stability ◽  
Carbon Fiber Cloth ◽  
Nanosheet Arrays

Electrochemically activated-3D self-supported electrodes composed of iron oxide nanosheets and carbon fiber cloth exhibited superior activity and long-term stability toward the oxygen evolution reaction.

Cobalt–borate nanowire array as a high-performance catalyst for oxygen evolution reaction in near-neutral media

2017 ◽  
Vol 5 (16) ◽  
pp. 7291-7294 ◽  
Author(s):  
Xiang Ren ◽  
Ruixiang Ge ◽  
Yong Zhang ◽  
Danni Liu ◽  
Dan Wu ◽  
...  
Keyword(s):  
High Activity ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Nanowire Array ◽  
Catalytic Current ◽  
Neutral Media ◽  
Ti Mesh

As a durable catalyst, cobalt–borate nanowire array on Ti mesh exhibits high activity for water oxidation in near-neutral media, thereby achieving a geometrical catalytic current density of 10 mA cm−2 at an overpotential of 420 mV.

A Zn-doped Ni3S2nanosheet array as a high-performance electrochemical water oxidation catalyst in alkaline solution

2017 ◽  
Vol 53 (92) ◽  
pp. 12446-12449 ◽  
Author(s):  
Qin Liu ◽  
Lisi Xie ◽  
Zhiang Liu ◽  
Gu Du ◽  
Abdullah M. Asiri ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Alkaline Solution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Oxidation Catalyst ◽  
Ni Foam ◽  
Catalytic Current ◽  
Nanosheet Array

A Zn-doped Ni3S2nanosheet array on Ni foam (Zn-Ni3S2/NF) acts as a high-performance and durable electrocatalyst for the oxygen evolution reaction in 1.0 M KOH, driving a catalytic current density of 100 mA cm−2at an overpotential of 330 mV, 90 mV less than that for Ni3S2/NF.

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.

Controllable growth of graphdiyne layered nanosheets for high-performance water oxidation

2021 ◽  
Author(s):  
Shuya Zhao ◽  
Yurui Xue ◽  
Zhongqiang Wang ◽  
Zhiqiang Zheng ◽  
Xiaoyu Luan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Low Cost ◽  
Highly Active ◽  
Controllable Growth

Developing highly active, stable and low-cost electrocatalysts capable of an efficient oxygen evolution reaction (OER) is urgent and challenging.

Bifunctional citrate-Ni0.9Co0.1(OH)x layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation

Nanoscale ◽  
2021 ◽  
Author(s):  
Peng Wang ◽  
Feng Li ◽  
Xuefeng Long ◽  
Tong Wang ◽  
Huan Chai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Surface Oxygen ◽  
Co Catalyst ◽  
Photoelectrochemical Water Oxidation

Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered to be an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of hematite photoanode for...

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