Design Rules for Oxygen Evolution Catalysis at Porous Iron Oxide Electrodes: A 1000-Fold Current Density Increase

ChemSusChem ◽  
2017 ◽  
Vol 10 (18) ◽  
pp. 3644-3651 ◽  
Author(s):  
Sandra Haschke ◽  
Dmitrii Pankin ◽  
Yuri Petrov ◽  
Sebastian Bochmann ◽  
Alina Manshina ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Oxygen Evolution ◽  
Current Density ◽  
Density Increase ◽  
Porous Iron ◽  
Design Rules ◽  
Current Density Increase ◽  
Oxide Electrodes

Investigation of the mechanism of current density increase in volume sources of hydrogen negative ions at cesium adding

2002 ◽  
Vol 73 (3) ◽  
pp. 1157-1160 ◽  
Author(s):  
V. P. Goretsky ◽  
A. V. Ryabtsev ◽  
I. A. Soloshenko ◽  
A. F. Tarasenko ◽  
A. I. Shchedrin
Keyword(s):  
Current Density ◽  
Negative Ions ◽  
Density Increase ◽  
Current Density Increase

scholarly journals The impact of local current density increase on conductor destruction

2019 ◽  
Vol 1147 ◽  
pp. 012033 ◽  
Author(s):  
S I Krivosheev ◽  
Yu E Adamian ◽  
D I Alekseev ◽  
S G Magazinov ◽  
L V Chernenkaya ◽  
...  
Keyword(s):  
Current Density ◽  
Density Increase ◽  
Local Current Density ◽  
Current Density Increase ◽  
Local Current ◽  
The Impact

10 MA cm−2 current density in nanoscale conductive bridge threshold switching selector via densely localized cation sources

2021 ◽  
Author(s):  
Qi Lin ◽  
Jinlong Feng ◽  
Junhui Yuan ◽  
Long Liu ◽  
Jason K. Eshraghian ◽  
...  
Keyword(s):  
Current Density ◽  
Density Increase ◽  
Current Density Increase ◽  
Threshold Switching ◽  
Cation Layer ◽  
Conductive Bridge

Super-ionic cation layer was introduced into the CBTS selector to realize ten-fold current density increase.

scholarly journals Measurement and Modeling of Thermal Conductivity for Dense Iron Oxide and Porous Iron Ore Aggliomerates in Stepwise Reduction.

1992 ◽  
Vol 32 (7) ◽  
pp. 829-837 ◽  
Author(s):  
Tomohiro Akiyama ◽  
Hiromichi Ohta ◽  
Reijiro Takahashi ◽  
Yoshio Waseda ◽  
Jun-ichiro Yagi
Keyword(s):  
Thermal Conductivity ◽  
Iron Oxide ◽  
Iron Ore ◽  
Porous Iron ◽  
Stepwise Reduction

scholarly journals Investigation of NiFe-Based Catalysts for Oxygen Evolution in Anion-Exchange Membrane Electrolysis

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1720
Author(s):  
Sabrina Campagna Zignani ◽  
Massimiliano Lo Faro ◽  
Stefano Trocino ◽  
Antonino Salvatore Aricò
Keyword(s):  
Single Cell ◽  
Anion Exchange ◽  
Oxygen Evolution ◽  
Current Density ◽  
Electrochemical Behaviour ◽  
Stress Test ◽  
Supporting Electrolyte ◽  
Anion Exchange Membrane ◽  
Operating Conditions ◽  
Exchange Membrane

NiFe electrodes are developed for the oxygen evolution reaction (OER) in an alkaline electrolyser based on an anion exchange membrane (AEM) separator and fed with diluted KOH solution as supporting electrolyte. This study reports on the electrochemical behaviour of two different NiFe-oxide compositions (i.e., Ni1Fe1-oxide and Ni1Fe2-oxide) prepared by the oxalate method. These catalysts are assessed for single-cell operation in an MEA including a Sustainion™ anion-exchange membrane. The electrochemical polarization shows a current density of 650 mA cm−2 at 2 V and 50 °C for the Ni1Fe1 anode composition. A durability test of 500 h is carried out using potential cycling as an accelerated stress-test. This shows a decrease in current density of 150 mA cm−2 mainly during the first 400 h. The performance achieved for the anion-exchange membrane electrolyser single-cell based on the NiFeOx catalyst appears promising. However, further improvements are required to enhance the stability under these operating conditions.

Preparation of micron-sized spherical porous iron oxide particles

2003 ◽  
Vol 13 (5) ◽  
pp. 983-985 ◽  
Author(s):  
Allen W. Apblett ◽  
Satish I. Kuriyavar ◽  
B. P. Kiran
Keyword(s):  
Iron Oxide ◽  
Porous Iron ◽  
Iron Oxide Particles ◽  
Oxide Particles

Iron phosphide nanoparticles as an efficient electrocatalyst for the OER in alkaline solution

2016 ◽  
Vol 4 (25) ◽  
pp. 9750-9754 ◽  
Author(s):  
J. Masud ◽  
S. Umapathi ◽  
N. Ashokaan ◽  
M. Nath
Keyword(s):  
Oxygen Evolution ◽  
Alkaline Medium ◽  
Alkaline Solution ◽  
Current Density ◽  
Exchange Current ◽  
Exchange Current Density ◽  
Iron Phosphide ◽  
Onset Potential ◽  
Low Overpotential

Ultrasmall FeP nanoparticles have been reported as an efficient oxygen evolution electrocatalyst in alkaline medium with low onset potential for oxygen evolution and require low overpotential to reach 10 mA cm−2 exchange current density.

scholarly journals Facile Synthesis of Carbon Cloth Supported Cobalt Carbonate Hydroxide Hydrate Nanoarrays for Highly Efficient Oxygen Evolution Reaction

2021 ◽  
Vol 9 ◽  
Author(s):  
Yubing Yan
Keyword(s):  
Electron Microscopy ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Carbon Cloth ◽  
High Porosity ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Hydroxide Hydrate

Developing efficient and low-cost replacements for noble metals as electrocatalysts for the oxygen evolution reaction (OER) remain a great challenge. Herein, we report a needle-like cobalt carbonate hydroxide hydrate (Co(CO3)0.5OH·0.11H2O) nanoarrays, which in situ grown on the surface of carbon cloth through a facile one-step hydrothermal method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations demonstrate that the Co(CO3)0.5OH nanoarrays with high porosity is composed of numerous one-dimensional (1D) nanoneedles. Owing to unique needle-like array structure and abundant exposed active sites, the Co(CO3)0.5OH@CC only requires 317 mV of overpotential to reach a current density of 10 mA cm−2, which is much lower than those of Co(OH)2@CC (378 mV), CoCO3@CC (465 mV) and RuO2@CC (380 mV). For the stability, there is no significant attenuation of current density after continuous operation 27 h. This work paves a facile way to the design and construction of electrocatalysts for the OER.

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