scholarly journals Laser Fragmentation‐Induced Defect‐Rich Cobalt Oxide Nanoparticles for Electrochemical Oxygen Evolution Reaction

ChemSusChem ◽  
2019 ◽  
Vol 13 (3) ◽  
pp. 520-528 ◽  
Author(s):  
Mingquan Yu ◽  
Friedrich Waag ◽  
Candace K. Chan ◽  
Claudia Weidenthaler ◽  
Stephan Barcikowski ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxide Nanoparticles ◽  
Cobalt Oxide Nanoparticles ◽  
Electrochemical Oxygen

Superior performance and stability of anion exchange membrane water electrolysis: pH-controlled copper cobalt oxide nanoparticles for the oxygen evolution reaction

2020 ◽  
Vol 8 (8) ◽  
pp. 4290-4299 ◽  
Author(s):  
Myeong Je Jang ◽  
Juchan Yang ◽  
Jongmin Lee ◽  
Yoo Sei Park ◽  
Jaehoon Jeong ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Anion Exchange ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Superior Performance ◽  
Oxide Nanoparticles ◽  
Cobalt Oxide Nanoparticles ◽  
Exchange Membrane

Cu0.5Co2.5O4 nanoparticles are obtained by changes in the pH and applied as the anode in anion exchange membrane water electrolysis.

Morphologically controlled cobalt oxide nanoparticles for efficient oxygen evolution reaction

2021 ◽  
Vol 582 ◽  
pp. 322-332
Author(s):  
Bappi Paul ◽  
Piyali Bhanja ◽  
Sachin Sharma ◽  
Yusuke Yamauchi ◽  
Zeid A. Alothman ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxide Nanoparticles ◽  
Cobalt Oxide Nanoparticles

Reticulated porous carbon foam with cobalt oxide nanoparticles for excellent oxygen evolution reaction

2021 ◽  
pp. 125131
Author(s):  
Shiv Prakash ◽  
Ravi Kumar ◽  
Pankaj Kumar ◽  
Sonu Rani ◽  
Khushboo Kumari ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Porous Carbon ◽  
Oxygen Evolution Reaction ◽  
Carbon Foam ◽  
Oxide Nanoparticles ◽  
Cobalt Oxide Nanoparticles

scholarly journals Selective acid leaching: a simple way to engineer cobalt oxide nanostructures for the electrochemical oxygen evolution reaction

2019 ◽  
Vol 7 (40) ◽  
pp. 23130-23139 ◽  
Author(s):  
Mingquan Yu ◽  
Kendra Solveig Belthle ◽  
Cengiz Tüysüz ◽  
Harun Tüysüz
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Acid Leaching ◽  
Oxide Nanostructures ◽  
Electrochemical Oxygen

A facile and scalable strategy via diluted-HCl leaching was developed to prepare sub-5 nm Co3O4 nanocrystals for electrochemical water oxidation.

scholarly journals Bifunctional Electrocatalyst of Low-Symmetry Mesoporous Titanium Dioxide Modified with Cobalt Oxide for Oxygen Evolution and Reduction Reactions

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 836
Author(s):  
Mabrook S. Amer ◽  
Mohamed A. Ghanem ◽  
Prabhakarn Arunachalam ◽  
Abdullah M. Al-Mayouf ◽  
Sultan M. Hadadi
Keyword(s):  
Titanium Dioxide ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Synergetic Effect ◽  
Oxide Nanoparticles ◽  
Charge Carrier Density ◽  
X Ray ◽  
Cobalt Oxide Nanoparticles ◽  
Mesoporous Titanium Dioxide ◽  
Low Symmetry

Hybrids of low-symmetry (disordered) mesoporous titanium dioxide modified with different weight ratios of cobalt oxide nanoparticles (Co3O4(x)/lsm-TiO2) are prepared using a one-pot self-assembly surfactant template. The physicochemical characterization of Co3O4(x)/lsm-TiO2 hybrids by scanning and transmission electron microscopy, X-ray diffraction, N2 adsorption–desorption isotherms, and X-ray photoelectron spectroscopy confirm the successful incorporation of cobalt oxide nanoparticles (2–3 nm in diameter) with preservation of the highly mesoporous structure of titanium dioxide substrate. Among these mesoporous hybrids, the ~3.0 wt.% Co3O4/lsm-TiO2 exhibits the best performance toward both the oxygen evolution (OER) and reduction (ORR) reactions in alkaline solution. For the OER, the hybrid shows oxidation overpotential of 348 mV at 10 mA cm−2, a turnover frequency (TOF) of 0.034 s−1, a Tafel slope of 54 mV dec−1, and mass activity of 42.0 A g−1 at 370 mV. While for ORR, an onset potential of 0.84 V vs. RHE and OER/ORR overpotential gap (ΔE) of 0.92 V are achieved which is significantly lower than that of commercial Pt/C, hexagonal mesoporous, and bulk titanium dioxide analogous. The Co3O4/lsm-TiO2 hybrid demonstrates significantly higher long-term durability than IrO2. Apparently, such catalytic activity performance originates from the synergetic effect between Co3O4 and TiO2 substrate, in addition to higher charge carrier density and the presence of disordered mesopores which provide short ions diffusion path during the electrocatalytic process.

Enhanced Catalysis of the Electrochemical Oxygen Evolution Reaction by Iron(III) Ions Adsorbed on Amorphous Cobalt Oxide

ACS Catalysis ◽  
2017 ◽  
Vol 8 (2) ◽  
pp. 807-814 ◽  
Author(s):  
Luo Gong ◽  
Xin Yu Esther Chng ◽  
Yonghua Du ◽  
Shibo Xi ◽  
Boon Siang Yeo
Keyword(s):  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrochemical Oxygen
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