Hydrothermal Synthesis, Characterization and Electrocatalytic Activity of La0.8Sr0.2MnO3 Nanocubes for Oxygen Reduction Reaction

2007 ◽  
Vol 119 ◽  
pp. 275-278 ◽  
Author(s):  
Upendra A. Joshi ◽  
Jae Sung Lee
Keyword(s):  
Hydrothermal Synthesis ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Hydrothermal Process ◽  
Reduction Reaction ◽  
Xrd Pattern ◽  
Phase Purity ◽  
Cyclic Voltametry ◽  
Reduction Current

The La0.8Sr0.2MnO3 nanocubes have been synthesized by simple precipitation followed by hydrothermal process. The as-obtained nanocubes were characterized by SEM, TEM, EDS, XRD and ICP-AA. The SEM and TEM images clearly showed cube type morphology of reaction product. The XRD pattern gave evidence for the phase purity and high crystallinity of the La0.8Sr0.2MnO3 nanocubes. The ICP-AA analysis along with EDS confirms the stoichiometry of the product. Electrochemical activity for oxygen reduction reaction was carried out in 1 M KOH. The oxygen reduction current measured by cyclic voltametry showed six times higher value for nanocubes than that of bulk catalysts of same composition.

scholarly journals Effect of Co3O4 Nanoparticles on Improving Catalytic Behavior of Pd/Co3O4@MWCNT Composites for Cathodes in Direct Urea Fuel Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1017
Author(s):  
Nguyen-Huu-Hung Tuyen ◽  
Hyun-Gil Kim ◽  
Young-Soo Yoon
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Hydrothermal Process ◽  
Pd Nanoparticles ◽  
Reduction Reaction ◽  
Co3o4 Nanoparticles ◽  
Cathode Catalyst ◽  
Multi Walled Carbon Nanotubes

Direct urea fuel cells (DUFCs) have recently drawn increased attention as sustainable power generation devices because of their considerable advantages. Nonetheless, the kinetics of the oxidation-reduction reaction, particularly the electrochemical oxidation and oxygen reduction reaction (ORR), in direct urea fuel cells are slow and hence considered to be inefficient. To overcome these disadvantages in DUFCs, Pd nanoparticles loaded onto Co3O4 supported by multi-walled carbon nanotubes (Pd/Co3O4@MWCNT) were employed as a promising cathode catalyst for enhancing the electrocatalytic activity and oxygen reduction reaction at the cathode in DUFCs. Co3O4@MWCNT and Pd/Co3O4@MWCNT were synthesized via a facile two-step hydrothermal process. A Pd/MWCNT catalyst was also prepared and evaluated to study the effect of Co3O4 on the performance of the Pd/Co3O4@MWCNT catalyst. A current density of 13.963 mA cm−2 and a maximum power density of 2.792 mW cm−2 at 20 °C were obtained. Pd/Co3O4@MWCNT is a prospectively effective cathode catalyst for DUFCs. The dilution of Pd with non-precious metal oxides in adequate amounts is economically conducive to highly practical catalysts with promising electrocatalytic activity in fuel cell applications.

scholarly journals A one-pot hydrothermal synthesis of sulfur and nitrogen doped carbon aerogels with enhanced electrocatalytic activity in the oxygen reduction reaction

2012 ◽  
Vol 14 (5) ◽  
pp. 1515 ◽  
Author(s):  
Stephanie-Angelika Wohlgemuth ◽  
Robin Jeremy White ◽  
Marc-Georg Willinger ◽  
Maria-Magdalena Titirici ◽  
Markus Antonietti
Keyword(s):  
Hydrothermal Synthesis ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Reduction Reaction ◽  
Carbon Aerogels ◽  
One Pot ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Tailoring molecular architectures of Fe phthalocyanine on nanocarbon supports for high oxygen reduction performance

2015 ◽  
Vol 3 (18) ◽  
pp. 10013-10019 ◽  
Author(s):  
Shiming Zhang ◽  
Heyou Zhang ◽  
Xing Hua ◽  
Shengli Chen
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Alkaline Solution ◽  
Electrocatalytic Activity ◽  
Reduction Reaction ◽  
High Oxygen ◽  
Molecular Architectures

Tailored molecular architectures of FePc on nanocarbon supports from nanorods to uniform shells exhibit excellent electrocatalytic activity for the oxygen reduction reaction in alkaline solution.

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