Charge-discharge behavior of K2FeO4 electrodes in concentrated KOH solutions

Yang, Weiben; Wang, J.

doi:10.1134/s1023193506040045

Cited by 32 publications

(43 citation statements)

References 13 publications

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“…Many different materials have been proposed as electrocatalysts. These include carbon nanotubes [11], platinum modified gold electrodes [12], Co(II)-macrocycle complexes [13], manganese dioxide [14], copper-nickel alloys [15], cobaloxime complexes [6], transition metal phthalocyanines [16] gold nanoparticles [17] and anthraquinones [5, 7, 10, 18 -21] The study of the electrochemical behavior of different quinone groups, Q, has received considerable attention during the last decade. The reduction of oxygen stops at the peroxide stage:…”

Section: Introductionmentioning

confidence: 99%

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

2005

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A series of modified electrodes were prepared both via solvent evaporation and electrochemical cycling of azobenzene and derivatives and various quinones and assessed for their suitability as oxygen reduction electrocatalysts and sonoelectrocatalysts. Glassy carbon electrodes were modified via solvent evaporation with 1,2-dihydroxyanthraquinone and 1,2-diazonium-9,10-anthraquinone while edge plane and basal plane pyrolytic graphite electrodes were modified by the same procedure with 9,10-phenanthraquinone. The stability of the attached moiety was accessed in each case under ultrasound. For comparison the same electrode substrates were modified with 9,10-phenanthraquinone by electrochemical cycling and also exposed to ultrasound. The observed results suggest the use of the glassy carbon electrodes modified with azobenzene and derivatives via solvent evaporation as the optimal carbon based sonoelectrocatalysts for oxygen reduction in term of stability under insonation and high catalytic rate.

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Section: Introductionmentioning

confidence: 99%

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

2005

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“…A higher catalytic activity should be expected since amorphous manganese oxides own much more lattice defects and active sites compared to crystalline manganese oxides . Moreover, the conductivity of lithiated NiO is relatively close to that of metals, which is suggested by a high conductivity in favor of easily transmitting electrons without needing inactive materials such as carbon.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with crystalline manganese oxides, amorphous manganese oxides own much more structure distortion and likely more active sites. In light of this, such electrocatalysts have been paid much attention …”

Section: Introductionmentioning

confidence: 99%

An Amorphous MnO₂/Lithiated NiO Nanosheet Array as an Efficient Bifunctional Electrocatalyst for Iron Molten Air Batteries

et al. 2019

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Iron molten air battery is considered one of the promising batteries in next‐generation energy storage due to high theoretical specific energy density, cost efficiency, and environment‐friendly merits. Herein, an amorphous MnO2/lithiated NiO nanosheet array is grown directly on a highly conductive nickel foam substrate to use as a bifunctional electrocatalyst in iron molten air batteries. The advantages of the nanosheet array structure are having more highly exposed active sites for electrochemical reactions, as well as a conductive stable 3D framework for allowing barrier‐free diffusion and transport of ions and oxygen gas. As a result, the amorphous MnO2/lithiated NiO nanosheet array exhibits a promising catalytic activity for oxygen evolution reaction and oxygen reduction reaction with a voltage gap of only 0.29 V. The as‐assembled iron molten air battery shows an impressive rechargeability with the highest coulombic efficiency of nearly 100% through 200 cycles with an average discharge potential of ≈1.14 V at 500 °C. Moreover, the cell has a high rate response up to 6.7 C with a discharge voltage of above 0.9 V. The study achieves critical advances for iron molten air batteries without the use of precious metals in contrast with previous results using the Pd‐based catalyst.

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“…[1][2][3] The most famous catalyst in this oxygen reduction reaction (ORR) is the platinum anyhow, which is a valuable and costly metal. Therefore, for economical reasons, it should be preferably replaced or modified.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Reduction Reaction on a Rotating Ag/GC Disk Electrode in Acidic Solution

et al. 2010

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Finding an appropriate mechanism of oxygen reduction reaction, without having kinetic parameters and intermediate species at hand, is an impossible task. In view of the fact that this reaction is one of the important reactions, it was tried to overcome this problem through computing the kinetic parameters by means of Ag/GC rotating disc electrode in an acidic solution. Using this electrode, two values were obtained for electron transfer coefficient and reaction order was calculated through relative equations. Based on this information, an ECE (electrochemical chemical electrochemical) mechanism has been proposed.

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Charge-discharge behavior of K2FeO4 electrodes in concentrated KOH solutions

Cited by 32 publications

References 13 publications

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

An Amorphous MnO₂/Lithiated NiO Nanosheet Array as an Efficient Bifunctional Electrocatalyst for Iron Molten Air Batteries

Oxygen Reduction Reaction on a Rotating Ag/GC Disk Electrode in Acidic Solution

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Charge-discharge behavior of K2FeO4 electrodes in concentrated KOH solutions

Cited by 32 publications

References 13 publications

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

Exploration of Stable Sonoelectrocatalysis for the Electrochemical Reduction of Oxygen

An Amorphous MnO2/Lithiated NiO Nanosheet Array as an Efficient Bifunctional Electrocatalyst for Iron Molten Air Batteries

Oxygen Reduction Reaction on a Rotating Ag/GC Disk Electrode in Acidic Solution

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An Amorphous MnO₂/Lithiated NiO Nanosheet Array as an Efficient Bifunctional Electrocatalyst for Iron Molten Air Batteries