scholarly journals Electrocatalytic oxidation of water at a polyoxometalate nanoparticle modified gold electrode

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38713-38717 ◽  
Author(s):  
Abhinandan Mahanta ◽  
Koushik Barman ◽  
Sk Jasimuddin
Keyword(s):  
Current Density ◽  
Water Oxidation ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Gold Electrode ◽  
Electrocatalytic Oxidation ◽  
Neutral Ph ◽  
A Current

Polyoxometalate nanoparticles, [H3PMo12O40]NPs, modified gold electrode showed excellent electrocatalytic activity towards water oxidation reaction at an overpotential of 350 mV with a current density of 1.7 mA cm−2 in neutral pH medium.

Electrocatalytic oxidation of water using self-assembled copper(ii) tetraaza macrocyclic complexes on a 4-(pyridine-4′-amido)benzene grafted gold electrode

2021 ◽  
Author(s):  
Abhinandan Mahanta ◽  
Koushik Barman ◽  
Umme Solaem Akond ◽  
Sk Jasimuddin
Keyword(s):  
Current Density ◽  
Water Oxidation ◽  
Electrocatalytic Activity ◽  
Gold Electrode ◽  
Electrocatalytic Oxidation ◽  
Gold Surface ◽  
Macrocyclic Complex ◽  
Macrocyclic Complexes ◽  
Tetraaza Macrocyclic Complex ◽  
A Current

Gold surface anchored copper(ii)tetraaza macrocyclic complex showed an excellent electrocatalytic activity towards water oxidation with an overpotential of 284 mV at a current density of 1.31 mA cm−2 and a Tafel slope of 48 mV decade−1 in neutral pH.

Electrocatalytic oxidation of water by a self-assembled oxovanadium(iv) complex modified gold electrode

2015 ◽  
Vol 5 (12) ◽  
pp. 5100-5104 ◽  
Author(s):  
Koushik Barman ◽  
Sk Jasimuddin
Keyword(s):  
Water Oxidation ◽  
Electrocatalytic Activity ◽  
Gold Electrode ◽  
Electrocatalytic Oxidation ◽  
Neutral Ph ◽  
Self Assembled

An oxovanadium(iv) complex modified gold electrode showed efficient electrocatalytic activity towards water oxidation at neutral pH.

Synthesis of ultrasmall and monodisperse sulfur nanoparticle intercalated CoAl layered double hydroxide and its electro-catalytic water oxidation reaction at neutral pH

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7560-7566 ◽  
Author(s):  
Dewan Azharul Islam ◽  
Koushik Barman ◽  
Sk Jasimuddin ◽  
Himadri Acharya
Keyword(s):  
Layered Double Hydroxide ◽  
Current Density ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
High Current Density ◽  
High Current ◽  
Tafel Slope ◽  
Neutral Ph ◽  
Low Overpotential ◽  
Double Hydroxide

Sulfur nanoparticle intercalated CoAl-LDH as a robust electrocatalyst for water oxidation reaction at a low overpotential of 250 mV, high current density of 7.9 mA cm−2 and Tafel slope of 61 mV dec−1 under neutral pH condition.

scholarly journals Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhanwu Lei ◽  
Wenbin Cai ◽  
Yifei Rao ◽  
Kuan Wang ◽  
Yuyuan Jiang ◽  
...  
Keyword(s):  
High Activity ◽  
Current Density ◽  
Water Oxidation ◽  
Distribution Density ◽  
High Surface ◽  
Single Atom ◽  
Surface Distribution ◽  
Oxidation Activity ◽  
Nanosheet Arrays ◽  
A Current

AbstractSingle-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to fabricate a high surface distribution density of iridium (Ir) SAC on nickel-iron sulfide nanosheet arrays substrate (Ir1/NFS), which delivers a high water oxidation activity. The Ir1/NFS catalyst offers a low overpotential of ~170 mV at a current density of 10 mA cm−2 and a high turnover frequency of 9.85 s−1 at an overpotential of 300 mV in 1.0 M KOH solution. At the same time, the Ir1/NFS catalyst exhibits a high stability performance, reaching a lifespan up to 350 hours at a current density of 100 mA cm−2. First-principles calculations reveal that the electronic structures of Ir atoms are significantly regulated by the sulfide substrate, endowing an energetically favorable reaction pathway. This work represents a promising strategy to fabricate high surface distribution density single-atom catalysts with high activity and durability for electrochemical water splitting.

A cobalt-borate nanosheet array: an efficient and durable non-noble-metal electrocatalyst for water oxidation at near neutral pH

2017 ◽  
Vol 5 (16) ◽  
pp. 7305-7308 ◽  
Author(s):  
Libin Yang ◽  
Danni Liu ◽  
Shuai Hao ◽  
Rongmei Kong ◽  
Abdullah M. Asiri ◽  
...  
Keyword(s):  
High Activity ◽  
Noble Metal ◽  
Current Density ◽  
Water Oxidation ◽  
Catalytic Current ◽  
Neutral Ph ◽  
Nanosheet Array ◽  
Ti Mesh ◽  
Catalyst Electrode

As a durable catalyst electrode, a cobalt-borate nanosheet array on a Ti mesh shows high activity for water oxidation in 0.1 M K-Bi (pH: 9.2), achieving a geometrical catalytic current density of 10 mA cm−2 at an overpotential of 469 mV.

Hierarchical CoS2/Ni3S2/CoNiOx nanorods with favorable stability at 1 A cm−2 for electrocatalytic water oxidation

2019 ◽  
Vol 55 (11) ◽  
pp. 1564-1567 ◽  
Author(s):  
Husileng Lee ◽  
Xiujuan Wu ◽  
Qilun Ye ◽  
Xingqiang Wu ◽  
Xiaoxiao Wang ◽  
...  
Keyword(s):  
Current Density ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
A Current

A hierarchical 3D CoS2/Ni3S2/CoNiOx water oxidation catalyst can maintain a current density of 1 A cm−2 for one week in 30% KOH solution with a slight increase of the overpotential.

scholarly journals Low-cost CoFe2O4/biomass carbon hybrid from metal-enriched sulfate reducing bacteria as an electrocatalyst for water oxidation

RSC Advances ◽  
2018 ◽  
Vol 8 (40) ◽  
pp. 22799-22805 ◽  
Author(s):  
Songhu Bi ◽  
Jingde Li ◽  
Qin Zhong ◽  
Chuntan Chen ◽  
Qiyi Zhang ◽  
...  
Keyword(s):  
Current Density ◽  
Water Oxidation ◽  
Low Cost ◽  
Sulfate Reducing Bacteria ◽  
Biomass Carbon ◽  
Tafel Slope ◽  
Sulfate Reducing ◽  
Reducing Bacteria ◽  
A Current

A low-cost CoFe2O4/biomass carbon (CFO@BC/Zn) hybrid from Co-enriched Sulfate Reducing Bacteria (Co-SRB) as an electrocatalyst for OER. The electrocatalyst exhibits a low potential of 1.53 V at a current density 10 mA cm−2 and Tafel slope of 86 mV dec−1.

Construction of a hierarchical NiFe layered double hydroxide with a 3D mesoporous structure as an advanced electrocatalyst for water oxidation

2018 ◽  
Vol 5 (8) ◽  
pp. 1795-1799 ◽  
Author(s):  
Jiahao Yu ◽  
Fulin Yang ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Hydrothermal Method ◽  
Layered Double Hydroxide ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Cost Effective ◽  
Mesoporous Structure ◽  
One Step ◽  
Double Hydroxide ◽  
A Current

A facile and cost-effective one-step hydrothermal method is used to synthesize NiFe LDH microclusters with a 3D hierarchically mesoporous architecture. This superior electrocatalyst can achieve a current density of 10 mA cm−2 with an ultralow overpotential of 211 mV toward the oxygen evolution reaction.

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