Oxygen Adsorption on High-Index Faceted Pt Nanoparticles

2021 ◽  
Author(s):  
Wuyang Lin ◽  
Rao Huang ◽  
Lei Li ◽  
Yuhua Wen
Keyword(s):  
Monte Carlo ◽  
Fuel Cells ◽  
Oxygen Reduction ◽  
Pt Nanoparticles ◽  
Oxygen Adsorption ◽  
High Index ◽  
Grand Canonical Monte Carlo ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Grand Canonical

High-index faceted Pt nanoparticles with excellent electrocatalytic performances are promising to efficiently accelerate the oxygen reduction reactions in fuel cells. By adopting the hybrid grand canonical Monte Carlo reactive molecular...

Polymer Electrolyte Fuel Cells Employing Heteropolyacids as Redox Mediators for Oxygen Reduction Reactions: Pt-Free Cathode Systems

2016 ◽  
Vol 8 (28) ◽  
pp. 18119-18125 ◽  
Author(s):  
Toshiaki Matsui ◽  
Eri Morikawa ◽  
Shintaro Nakada ◽  
Takeou Okanishi ◽  
Hiroki Muroyama ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Redox Mediators ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

Heterojunctions of silver–iron oxide on graphene for laser-coupled oxygen reduction reactions

2018 ◽  
Vol 54 (57) ◽  
pp. 7900-7903 ◽  
Author(s):  
Wei-Quan Chen ◽  
Min-Chuan Chung ◽  
Joey Andrew A. Valinton ◽  
David P. Penaloza ◽  
Shiow-Huey Chuang ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Oxygen Reduction ◽  
Oxygen Adsorption ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Doped Graphene ◽  
Desorption Equilibrium ◽  
Adsorption Desorption

We report a two-step hybridization of N-doped graphene and Ag-decorated Fe2O3 hematite to realize a balanced oxygen adsorption/desorption equilibrium and a laser-coupled ORR (LORR).

Carbon-Supported W@Pt Nanoparticles with a Pt-Enriched Surface as a Robust Electrocatalyst for Oxygen Reduction Reactions

2018 ◽  
Vol 3 (4) ◽  
pp. 1056-1061 ◽  
Author(s):  
Yajun Wang ◽  
Yang Yang ◽  
Liangliang Zou ◽  
Qinghong Huang ◽  
Qiaoxia Li ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Pt Nanoparticles ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

scholarly journals Hydrogen Oxidation and Oxygen Reduction Reactions on an OsRu-Based Electrocatalyst Synthesized by Microwave Irradiation

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5692
Author(s):  
Ángela Selva-Ochoa ◽  
Javier Su-Gallegos ◽  
P. J. Sebastian ◽  
Lorena Magallón-Cacho ◽  
Edgar Borja-Arco
Keyword(s):  
Fuel Cells ◽  
Microwave Irradiation ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cells ◽  
Hydrogen Oxidation ◽  
Linear Sweep Voltammetry ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

This work presents an OsRu-based electrocatalyst synthesis, by a rapid and efficient method through microwave irradiation. The outstanding electrocatalyst shows a dual catalytic activity, demonstrating both hydrogen oxidation and oxygen reduction reactions. The material is structural and morphologically characterized by FT-IR, X-ray diffraction, EDS, and SEM, indicating nanoparticulated Os and Ru metallic phases with a crystallite size of ∼6 nm, calculated by the Scherrer equation. The metal nanoparticles are apparently deposited on a carbonaceous sponge-like morphology structure. Its electrochemical characterization is performed in 0.5 M H2SO4 by the rotating disk electrode technique, employing cyclic and linear sweep voltammetry. Two different ink treatments have been studied to improve the obtained polarization curves. The material was also tested in the presence of methanol for the oxygen reduction reaction, showing an important resistance to this contaminant, making it viable for its use in direct methanol fuel cells (DMFCs) as a cathode and in polymer electrolyte fuel cells (PEMFCs) as an anode as much as a cathode.

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