A Novel Indium-Induced-Synthesis In0.17Ru0.83O2 Nanoribbon as Highly Active Electrocatalysts for Oxygen Evolution in Acidic Media at High Current Densities above 400 mA cm−2

2022 ◽  
Author(s):  
Shi Chen ◽  
Changlai Wang ◽  
Fei-Yue Gao ◽  
Yang Yang ◽  
Minxue Huang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Ruthenium Dioxide ◽  
High Current ◽  
Acidic Media ◽  
Highly Active ◽  
Low Mass ◽  
Current Densities ◽  
Mass Activity

Ruthenium dioxide-based electrocatalyst possesses the most potential in acidic oxygen evolution reaction (OER), however, most of them show low current density, low mass activity and unsatisfied stability under strong acidic...

Multimetallic nanostructures for electrocatalytic oxygen evolution reaction in acidic media

2021 ◽  
Author(s):  
Taekyung Kim ◽  
Byeongyoon Kim ◽  
Taehyun Kwon ◽  
Ho Young Kim ◽  
Jin Young Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Proton Exchange Membrane ◽  
High Current Density ◽  
Green Technology ◽  
Proton Exchange ◽  
High Current ◽  
Acidic Media ◽  
Exchange Membrane

The proton exchange membrane water electrolyzer (PEMWE), driven by electrocatalysts, is a promising green technology for producing hydrogen. It provides high current density (0.6–2.0 A/cm2 at 1.75–2.20 V/cell) and high...

The mechanism of the electrolytic evolution of oxygen on platinum

1956 ◽  
Vol 237 (1209) ◽  
pp. 277-296 ◽  
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Discharge ◽  
Oxygen Electrode ◽  
Constant Current ◽  
Ph Effects ◽  
Anodic Current Density ◽  
High Current ◽  
Current Densities

The kinetics of the electrolytic oxygen evolution reaction on bright Pt anodes in H 2 SO 4 solutions have been studied under ultra pure solution conditions over the concentration range 10 -3 to 10 -1 N in the absence and presence of excess Na 2 SO 4 and in the current density range 10 -11 to 10 -3 A cm -2 . Investigations have also been carried out on the attainability of a reversible oxygen electrode, the time variation of oxygen overpotential at constant current density, its decay with time on open circuit, and the cathodic ionization of oxygen. The unattainability of the reversible oxygen electrode in normally purified solutions is due to the fact that the velocity of simultaneous electrode reactions between impurities in these, solutions and the electrode is much greater than the exchange current for the oxygen evolution reaction. The reversible oxygen potential could be observed and some of its properties studied in solutions which had been purified by a cathodic followed by an anodic pre-electrolysis at high current densities so that they contained less than 10 -11 mole 1. -1 of impurities. The ‘irreversible’ or ‘polarized’ oxygen electrode observed in ordinary solutions is thus a mixed electrode. The time variations of the oxygen overpotential on platinum anodes obeys the relation d nt /dInt = RT /α F' where α = 1/2 or 1, depending on t . It is due to the gradual deactivation of active centres caused by increasing oxide formation. The decay upon interruption of the current follows an analogous equation but α = 1/2 . A technique of determining the variation of the anodic current density as a function of potential has been developed and allows the evaluation of ‘ideal’ Tafel lines from the reversible potential to high current densities. Tafel lines have also been established for the cathodic ionization of oxygen. They intersect with those for anodic evolution at a value of potential which confirms that the overall anodic reaction at an oxygen electrode is 40H - —4e-> O 2 + 2H 2 O. Determination of the transfer coefficient for the reaction is shown to eliminate the combinations of oxygen atoms, the formation of H 2 O 2 or HO 2 , and other previously suggested rate-determining steps. This coefficient, together with the stoichiometric number, prove that the rate of the evolution reaction must be controlled by discharge of an OH - ion or a water molecule. Salt and pH effects show the discharging entity to be water. Discharge occurs on an oxide layer, probably PtO 2 . At high acid concentrations, specific adsorption of SO 2- 4 causes an anomalous increase in overpotential.

scholarly journals CoFe–OH Double Hydroxide Films Electrodeposited on Ni-Foam as Electrocatalyst for the Oxygen Evolution Reaction

2020 ◽  
Vol 234 (5) ◽  
pp. 995-1019 ◽  
Author(s):  
Kirill Sliozberg ◽  
Yauhen Aniskevich ◽  
Ugur Kayran ◽  
Justus Masa ◽  
Wolfgang Schuhmann
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Current ◽  
Ni Foam ◽  
Active Electrode ◽  
Catalyst Film ◽  
Cobalt Iron ◽  
Electrochemically Deposited ◽  
Current Densities ◽  
Double Hydroxide

AbstractCobalt-iron double hydroxide (CoFe–OH) films were electrochemically deposited on 3D Ni foam electrodes for the oxygen evolution reaction (OER). The dependence of the OER activity on film composition and thickness was evaluated, which revealed an optimal Fe:Co ratio of about 1:2.33. The composition of the catalyst film was observed to vary with film thickness. The electrodeposition parameters were carefully controlled to yield microstructured Ni-foam decorated with CoFe–OH films of controlled thickness and composition. The most active electrode exhibited an overpotential as low as 360 mV OER at an industrial scale current density of 400 mA cm−2 that remained stable for at least 320 h. This work contributes towards the fabrication of practical electrodes with the focus on the development of stable electrodes for electrocatalytic oxygen evolution at high current densities.

A strongly coupled 3D ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

2019 ◽  
Vol 7 (3) ◽  
pp. 965-971 ◽  
Author(s):  
Xiaodi Cheng ◽  
Zhiyan Pan ◽  
Chaojun Lei ◽  
Yangjun Jin ◽  
Bin Yang ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Oxygen Evolution ◽  
Synergistic Effects ◽  
High Current ◽  
Strongly Coupled ◽  
Highly Active ◽  
Current Densities

A ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid with strong coupling and synergistic effects was developed for highly active OER at ultra-high current densities.

Ultrafine oxygen-defective iridium oxide nanoclusters for efficient and durable water oxidation at high current densities in acidic media

2020 ◽  
Vol 8 (46) ◽  
pp. 24743-24751
Author(s):  
Zhipeng Yu ◽  
Junyuan Xu ◽  
Yifan Li ◽  
Bin Wei ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Surface ◽  
High Surface Area ◽  
Current Collector ◽  
Cost Effective ◽  
High Current ◽  
Acidic Media ◽  
Cost Effective Approach ◽  
Current Densities

Ultrafine IrOx nanoclusters are immobilized on a hydrothermally treated high-surface-area titanium current collector via a simple and cost-effective approach, showing outstanding performance for the oxygen evolution reaction at high current densities in acidic media.

A Cu2Se–Cu2O film electrodeposited on titanium foil as a highly active and stable electrocatalyst for the oxygen evolution reaction

2018 ◽  
Vol 54 (39) ◽  
pp. 4979-4982 ◽  
Author(s):  
Hu Chen ◽  
Yan Gao ◽  
Lu Ye ◽  
Yanan Yao ◽  
Xuyang Chen ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Titanium Foil ◽  
Catalytic Current ◽  
Cathodic Electrodeposition ◽  
Carbonate Buffer ◽  
Highly Active ◽  
High Durability ◽  
Cu2o Film

Cu2Se–Cu2O/TF electrode prepared via a simple and fast cathodic electrodeposition method. The electrode achieved a catalytic current density of 10 mA cm−2 for the OER at relatively low overpotential of 465 mV in 0.2 M carbonate buffer (pH = 11.0) and displayed a high durability over 20 h.

Prussian blue analog-derived 2D ultrathin CoFe2O4 nanosheets as high-activity electrocatalysts for the oxygen evolution reaction in alkaline and neutral media

2019 ◽  
Vol 7 (13) ◽  
pp. 7328-7332 ◽  
Author(s):  
Hengyi Fang ◽  
Taizhong Huang ◽  
Dong Liang ◽  
Ming Qiu ◽  
Yue Sun ◽  
...  
Keyword(s):  
Prussian Blue ◽  
High Activity ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
High Current Density ◽  
High Current ◽  
Prussian Blue Analog ◽  
Neutral Media

Oxygen vacancies on CoFe2O4 NSs and lattice oxygens that participate in the reaction deliver a high current density and low overpotential for the OER.

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