Oxygen Reduction Reaction on Pt-ZrO2/C during the Alcohol Crossover in Experimental Direct Alcohol Fuel Cells

2018 ◽  
Vol 21 (1) ◽  
pp. 057-062
Author(s):  
M. A. García ◽  
F. Ginez ◽  
S. A. Gamboa
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Room Temperature ◽  
Chemical Reduction ◽  
Reduction Process ◽  
Reduction Reaction ◽  
Electron Transfer Mechanism ◽  
Direct Alcohol Fuel Cells ◽  
Alcohol Fuel

Pt–ZrO2/C composite was synthesized by chemical reduction process. ZrO2 precursor was obtained by sol-gel at room temperature. The synthesis allowed the formation of Pt-ZrO2/C nanoparticles. The nanoparticles were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and transmission electron microscopy (TEM) techniques. The electrochemical experiments were carried out for investigating the electro-catalytic properties of the synthesized composite to promote the cathodic reaction in direct alcohol fuel cells (DAFC). The results indicated that Pt-ZrO2/C showed more tolerance than Pt/C based electrocatalyst to the presence of methanol or ethanol (due to alcohol crossover) during the oxygen reduction reaction (ORR) in direct alcohol fuel cells. The experimental results indicated that the ORR on Pt-ZrO2/C composite was predominant by the four electron transfer mechanism and first order reaction. The Pt-ZrO2/C based electrocatalyst showed adequate performance to carry out the ORR in experimental direct alcohol fuel cells operating at room temperature. The results revealed that Pt-ZrO2/C composite could be considered as a suitable candidate for reducing oxygen on the cathode of experimental DAFCs.

Fe-N/C catalysts for oxygen reduction reaction supported on different carbonaceous materials. Performance in acidic and alkaline direct alcohol fuel cells

2017 ◽  
Vol 205 ◽  
pp. 637-653 ◽  
Author(s):  
Luigi Osmieri ◽  
Ricardo Escudero-Cid ◽  
Marco Armandi ◽  
Alessandro H.A. Monteverde Videla ◽  
José Luís García Fierro ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Carbonaceous Materials ◽  
Direct Alcohol Fuel Cells ◽  
Alcohol Fuel

scholarly journals Scalable Carbon Nanotube/Platinum Nanoparticle Composite Inks from Salt Templates for Oxygen Reduction Reaction Electrocatalysis for PEM Fuel Cells

2020 ◽  
Vol 4 (4) ◽  
pp. 160
Author(s):  
Enoch A. Nagelli ◽  
F. John Burpo ◽  
Delaney A. Marbach ◽  
Aaron N. Romero ◽  
Daniel J. Rabbia ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Platinum Nanoparticles ◽  
Electrochemical Impedance ◽  
Chemical Reduction ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Platinum Nanoparticle

Platinum nanoparticles supported on multi-walled carbon nanotubes (CNTs) were synthesized by the chemical reduction of Magnus’s salt templates formed by the electrostatic stacking of oppositely charged platinum coordinated ions. The Magnus’s salt templated synthesis of platinum macrotubes, previously demonstrated, results in sidewalls made up of individual textured nanoparticles 100 nm in diameter and comprised of 5 nm diameter fibrils. Here we demonstrate a new platform method that utilizes the individual nanoparticles that make up the platinum macrotubes formed from salt templates and subsequently disperse them through a CNT network by ultrasonication to develop an electrocatalyst nanocomposite for the oxygen reduction reaction (ORR) critical for the development of proton exchange membrane (PEM) fuel cell applications. The structural morphology and composition of the nanocomposite catalysts was characterized using scanning electron microscopy (SEM), X-ray diffractometry (XRD), and Raman spectroscopy to confirm the presence of platinum nanoparticles throughout the CNT network of the nanocomposite. The electrocatalytic activity of the nanocomposite inks was verified with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV) for ORR. Furthermore, this all aqueous-based and scalable approach for the synthesis and dispersion of platinum nanoparticles with CNTs can lead to a new formulation process for the production of electrocatalytic nanocomposite inks for PEM fuel cells using the nanoparticles that form within salt templates after chemical reduction.

Assessing the Oxygen Reduction Reaction by a 2-electron Mechanism on Ceria Surfaces

2021 ◽  
Author(s):  
Mauro C dos Santos ◽  
Lanna Lucchetti ◽  
James Almeida ◽  
Pedro Alves da Silva Autreto
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction

The 2-electron pathway of the oxygen reduction reaction is an unwanted process in the development of fuel cells. In contrast, it has gained the scientific community’s attention due to its...

scholarly journals Design of ternary Pt-CoZn alloy catalysts coated with N-doped carbon towards acidic oxygen reduction

2021 ◽  
Author(s):  
Xieweiyi Ye ◽  
Yakun Xue ◽  
Kaijia Li ◽  
Wen Tang ◽  
Xiao Han ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Commercial Applications ◽  
Exchange Membrane ◽  
Alloy Catalysts

Improving the activity and durability of Pt-based electrocatalysts used in the acidic oxygen reduction reaction (ORR) is a great task for the commercial applications of proton-exchange membrane fuel cells. Alloying...

Development of high stable Pt-based ORR catalyst over Mn-modified polyaniline-based carbon nanofiber

2021 ◽  
Author(s):  
Hong Zhu ◽  
Qingjun Chen ◽  
Jinghua Yu ◽  
Qian Zhou ◽  
Fanghui Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Carbon Nanofiber ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Key Factors ◽  
Exchange Membrane

The corrosion of carbon support is one of key factors causing deactivation of Pt-based oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells. In this work, a highly...

Efficient Fe–Nx/C Electrocatalyst for Oxygen Reduction Reaction Derived from Porphyrin- Encapsulated Zeolitic Imidazolate Frameworks

2021 ◽  
Author(s):  
Jung Won Park ◽  
Byung Hoon Kim ◽  
Miyeon Kim ◽  
Junyoung Mun ◽  
Chang Yeon Lee
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Platinum Catalysts ◽  
Reduction Reaction ◽  
Zeolitic Imidazolate Frameworks

The development of non-platinum catalysts for the oxygen reduction reaction (ORR) in fuel cells is an urgent challenge given the limited reserves of platinum. The Fe–Nx/C electrocatalyst possessing isolated atomic...

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