scholarly journals Pt/C and Pt/SnOx/C Catalysts for Ethanol Electrooxidation: Rotating Disk Electrode Study

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 271 ◽  
Author(s):  
Artem Pushkarev ◽  
Irina Pushkareva ◽  
Natalia Ivanova ◽  
Stephanus du Preez ◽  
Dmitri Bessarabov ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Catalyst Activity ◽  
Rotating Disk ◽  
Carbon Support ◽  
Rotating Disk Electrode ◽  
Ethanol Electrooxidation ◽  
Disk Electrode ◽  
X Ray ◽  
Structure Morphology ◽  
Transition Electron

Pt/C and Pt/SnOx/C catalysts were synthesized using the polyol method. Their structure, morphology and chemical composition were studied using a scanning electron microscope equipped with an energy dispersive X-ray spectrometer, transition electron microscope and X-ray photoelectron spectroscope. Electrochemical measurements were based on the results of rotating disk electrode (RDE) experiments applied to ethanol electrooxidation. The quick evaluation of catalyst activity, electrochemical behavior, and an average number of transferred electrons were made using the RDE technique. The usage of SnOx (through the carbon support modification) in a binary system together with Pt causes a significant increase of the catalyst activity in ethanol oxidation reaction and the utilization of ethanol.

A Combined Rotating Disk Electrode/X-ray Diffraction Study of Co Dissolution from Pt1-xCox Alloys

2019 ◽  
Vol 33 (1) ◽  
pp. 303-308
Author(s):  
David Stevens ◽  
Stephen Wang ◽  
Robbie Sanderson ◽  
Gary C. Liu ◽  
George D. Vernstrom ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Elucidating Pt-Based Nanocomposite Catalysts for the Oxygen Reduction Reaction in Rotating Disk Electrode and Gas Diffusion Electrode Measurements

2021 ◽  
Author(s):  
Jia Du ◽  
Jonathan Quinson ◽  
Alessandro Zana ◽  
Matthias Arenz
Keyword(s):  
Oxygen Reduction Reaction ◽  
Rotating Disk ◽  
Carbon Support ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Au Nps ◽  
Improved Stability ◽  
Orr Activity

In the present study we compare different nanoparticle (NP) composites (nanocomposites) as potential electrocatalysts for the oxygen reduction reaction (ORR). The nanocomposites consist of a mixture of Pt and Ir NPs and Pt and Au NPs, respectively, that are immobilized onto a high surface area carbon support. Pt NPs supported on the same carbon support serve as benchmark. The performance testing was performed in a conventional rotating disk electrode (RDE) setup as well as in a recently introduced gas diffusion electrode (GDE) setup providing high mass transport conditions. The ORR activity is determined, and the degradation tested using accelerated degradation tests (ADTs). It is shown that with respect to the benchmark, the Pt – Au nanocomposite concept exhibits improved ORR activity as well as improved stability both in the RDE and the GDE measurements. By comparison, the Pt – Ir nanocomposite exhibits improved stability but lower ORR activity. Combining the GDE approach with small angle X-ray scattering, it is shown that the improved stability of the Pt – Au nanocomposite can be assigned to a reduced Pt particle growth due to the adjacent Au NPs. The results demonstrate that nanocomposites could be an alternative catalyst design strategy complementing the state-of-the-art alloying concepts.<br>

scholarly journals Carbon-Supported Pt-SnO2 Catalysts for Oxygen Reduction Reaction over a Wide Temperature Range: Rotating Disk Electrode Study

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1469
Author(s):  
Ruslan M. Mensharapov ◽  
Nataliya A. Ivanova ◽  
Dmitry D. Spasov ◽  
Elena V. Kukueva ◽  
Adelina A. Zasypkina ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Catalyst Activity ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Composite Catalyst ◽  
Kinetic Properties ◽  
Disk Electrode ◽  
Temperature Range

Pt/C and Pt/x-SnO2/C catalysts (where x is mass content of SnO2) were synthesized using a polyol method. Their kinetic properties towards oxygen reduction reaction were studied by a rotating disk electrode (RDE) technique in a temperature range from 1 to 50 °C. The SnO2 content of catalyst samples was 5 and 10 wt.%. A quick evaluation of the catalyst activity, electrochemical behavior and average number of transferred electrons were performed using the RDE technique. It has been shown that the use of x-SnO2 (through modification of the carbon support) in a binary system together with Pt does not reduce the catalyst activity in the temperature range of 1–30 °C. The temperature rising up to 50 °C resulted in composite catalyst activity reduction at about 30%.

scholarly journals Elucidating Pt-Based Nanocomposite Catalysts for the Oxygen Reduction Reaction in Rotating Disk Electrode and Gas Diffusion Electrode Measurements

2021 ◽  
Author(s):  
Jia Du ◽  
Jonathan Quinson ◽  
Alessandro Zana ◽  
Matthias Arenz
Keyword(s):  
Oxygen Reduction Reaction ◽  
Rotating Disk ◽  
Carbon Support ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Au Nps ◽  
Improved Stability ◽  
Orr Activity

In the present study we compare different nanoparticle (NP) composites (nanocomposites) as potential electrocatalysts for the oxygen reduction reaction (ORR). The nanocomposites consist of a mixture of Pt and Ir NPs and Pt and Au NPs, respectively, that are immobilized onto a high surface area carbon support. Pt NPs supported on the same carbon support serve as benchmark. The performance testing was performed in a conventional rotating disk electrode (RDE) setup as well as in a recently introduced gas diffusion electrode (GDE) setup providing high mass transport conditions. The ORR activity is determined, and the degradation tested using accelerated degradation tests (ADTs). It is shown that with respect to the benchmark, the Pt – Au nanocomposite concept exhibits improved ORR activity as well as improved stability both in the RDE and the GDE measurements. By comparison, the Pt – Ir nanocomposite exhibits improved stability but lower ORR activity. Combining the GDE approach with small angle X-ray scattering, it is shown that the improved stability of the Pt – Au nanocomposite can be assigned to a reduced Pt particle growth due to the adjacent Au NPs. The results demonstrate that nanocomposites could be an alternative catalyst design strategy complementing the state-of-the-art alloying concepts.<br>

A Combined Rotating Disk Electrode/X-Ray Diffraction Study of Co Dissolution from Pt1−xCox Alloys

2011 ◽  
Vol 158 (8) ◽  
pp. B899 ◽  
Author(s):  
D. A. Stevens ◽  
S. Wang ◽  
R. J. Sanderson ◽  
G. C. K. Liu ◽  
G. D. Vernstrom ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals X-ray photoelectron spectroscopy and rotating disk electrode measurements of smooth sputtered Fe-N-C films

2020 ◽  
Vol 515 ◽  
pp. 146012 ◽  
Author(s):  
Yun Xu ◽  
Michael J. Dzara ◽  
Sadia Kabir ◽  
Svitlana Pylypenko ◽  
Kenneth Neyerlin ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
X Ray

scholarly journals Elucidating Pt-Based Nanocomposite Catalysts for the Oxygen Reduction Reaction in Rotating Disk Electrode and Gas Diffusion Electrode Measurements

2021 ◽  
Author(s):  
Jia Du ◽  
Jonathan Quinson ◽  
Alessandro Zana ◽  
Matthias Arenz
Keyword(s):  
Oxygen Reduction Reaction ◽  
Rotating Disk ◽  
Carbon Support ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Au Nps ◽  
Improved Stability ◽  
Orr Activity

In the present study we compare different nanoparticle (NP) composites (nanocomposites) as potential electrocatalysts for the oxygen reduction reaction (ORR). The nanocomposites consist of a mixture of Pt and Ir NPs and Pt and Au NPs, respectively, that are immobilized onto a high surface area carbon support. Pt NPs supported on the same carbon support serve as benchmark. The performance testing was performed in a conventional rotating disk electrode (RDE) setup as well as in a recently introduced gas diffusion electrode (GDE) setup providing high mass transport conditions. The ORR activity is determined, and the degradation tested using accelerated degradation tests (ADTs). It is shown that with respect to the benchmark, the Pt – Au nanocomposite concept exhibits improved ORR activity as well as improved stability both in the RDE and the GDE measurements. By comparison, the Pt – Ir nanocomposite exhibits improved stability but lower ORR activity. Combining the GDE approach with small angle X-ray scattering, it is shown that the improved stability of the Pt – Au nanocomposite can be assigned to a reduced Pt particle growth due to the adjacent Au NPs. The results demonstrate that nanocomposites could be an alternative catalyst design strategy complementing the state-of-the-art alloying concepts.<br>

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