scholarly journals Stability evaluation of earth‐abundant metal‐based polyoxometalate electrocatalysts for oxygen evolution reaction towards industrial PEM electrolysis at high current densities

2021 ◽  
Author(s):  
Kim‐Marie Vetter ◽  
Camila Aring da Silva Ramos Mauro ◽  
David Reinisch ◽  
Thomas Reichbauer ◽  
Nemanja Martić ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Stability Evaluation ◽  
High Current ◽  
Earth Abundant ◽  
Current Densities ◽  
Pem Electrolysis

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.

scholarly journals Controllable Synthesis of 2D Nonlayered Cr2S3 Nanosheets and Their Electrocatalytic Activity Toward Oxygen Evolution Reaction

2021 ◽  
Vol 3 ◽  
Author(s):  
Tofik Ahmed Shifa ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Alberto Vomiero
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Chemical Vapor ◽  
Great Promise ◽  
Fertile Ground ◽  
Earth Abundant ◽  
Controllable Growth ◽  
Current Densities

The design of oxygen evolution reaction (OER) electrocatalysts based on Earth-abundant materials holds great promise for realizing practically viable water-splitting systems. In this regard, two-dimensional (2D) nonlayered materials have received considerable attention in recent years owing to their intrinsic dangling bonds which give rise to the exposure of unsaturated active sites. In this work, we solved the synthesis challenge in the development of a 2D nonlayered Cr2S3 catalyst for OER application via introducing a controllable chemical vapor deposition scheme. The as-obtained catalyst exhibits a very good OER activity requiring overpotentials of only 230 mV and 300 mV to deliver current densities of 10 mA cm−2 and 30 mA cm−2, respectively, with robust stability. This study provides a general approach to optimize the controllable growth of 2D nonlayered material and opens up a fertile ground for studying the various strategies to enhance the water splitting reactions.

Hollow nanocubes composed of well-dispersed mixed metal-rich phosphides in N-doped carbon as highly efficient and durable electrocatalysts for the oxygen evolution reaction at high current densities

2017 ◽  
Vol 5 (37) ◽  
pp. 19656-19663 ◽  
Author(s):  
Lei Zhang ◽  
Chun Chang ◽  
Chan-Wei Hsu ◽  
Chih-Wen Chang ◽  
Shih-Yuan Lu
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Current ◽  
Mixed Metal ◽  
Highly Efficient ◽  
Current Densities

A MOF-derived and SiO2-protected phosphorization approach was developed to prepare N-doped C/Ni5P4/Fe3P hollow nanocubes as highly efficient OER electrocatalysts.

Highly stable three-dimensional nickel–iron oxyhydroxide catalysts for oxygen evolution reaction at high current densities

2017 ◽  
Vol 245 ◽  
pp. 770-779 ◽  
Author(s):  
Feng Yan ◽  
Chunling Zhu ◽  
Chunyan Li ◽  
Shen Zhang ◽  
Xitian Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Three Dimensional ◽  
Iron Oxyhydroxide ◽  
High Current ◽  
Nickel Iron ◽  
Current Densities

Composition-balanced trimetallic MOFs as ultra-efficient electrocatalysts for oxygen evolution reaction at high current densities

2020 ◽  
Vol 279 ◽  
pp. 119375 ◽  
Author(s):  
Duraisamy Senthil Raja ◽  
Chun-Lung Huang ◽  
Yu-An Chen ◽  
YongMan Choi ◽  
Shih-Yuan Lu
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Current ◽  
Current Densities

The effect of Fe as constituent in Ni-base alloys on the oxygen evolution reaction in alkaline solutions at high current densities

2019 ◽  
Vol 44 (13) ◽  
pp. 6392-6402 ◽  
Author(s):  
Thomas Rauscher ◽  
Christian Immanuel Bernäcker ◽  
Uwe Mühle ◽  
Bernd Kieback ◽  
Lars Röntzsch
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Alkaline Solutions ◽  
High Current ◽  
Current Densities

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...

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.

Anodized Nickel Foam for Oxygen Evolution Reaction in Fe-Free and Unpurified Alkaline Electrolytes at High Current Densities

ACS Nano ◽  
2021 ◽  
Vol 15 (2) ◽  
pp. 3468-3480
Author(s):  
Yoon Jun Son ◽  
Kenta Kawashima ◽  
Bryan R. Wygant ◽  
Chon Hei Lam ◽  
James N. Burrow ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Nickel Foam ◽  
High Current ◽  
Alkaline Electrolytes ◽  
Current Densities
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