The Ethanol Oxidation Reaction Performance of Carbon-Supported PtRuRh Nanorods

In this study, carbon-supported Pt-based catalysts, including PtRu, PtRh, and PtRuRh nanorods (NRs), were prepared by the formic acid reduction method for ethanol oxidation reaction (EOR) application. The aspect ratio of all experimental NRs is 4.6. The X-ray photoelectron spectroscopy and H2-temperature-programmed reduction results confirm that the ternary PtRuRh has oxygen-containing species (OCS), including PtOx, RuOx and RhOx, on its surface and shows high EOR current density at 0.6 V. The corresponding physical structure results indicate that the surface OCS can enhance the adsorption of ethanol through bi-functional mechanism and thereby promote the EOR activity. On the other hand, the chronoamperometry (CA) results imply that the ternary PtRuRh has the highest mass activity, specific activity, and stability among all catalysts. The aforementioned pieces of evidence reveal that the presence of OCS facilitates the oxidation of adsorbed intermediates, such as CO or CHx, which prevents the Pt active sites from poisoning and thus simultaneously improves the current density and durability of PtRuRh NRs in EOR.

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Compressive strain induced by multiple phase distribution and atomic ordering in PdCu nanoparticles to enhanced ethanol oxidation reaction performance

Journal of Power Sources ◽

10.1016/j.jpowsour.2021.230168 ◽

2021 ◽

Vol 506 ◽

pp. 230168

Author(s):

P.C. Ashly ◽

Shreya Sarkar ◽

Saurav Ch. Sarma ◽

Komalpreet Kaur ◽

Ujjal K. Gautam ◽

...

Keyword(s):

Oxidation Reaction ◽

Ethanol Oxidation ◽

Phase Distribution ◽

Compressive Strain ◽

Atomic Ordering ◽

Ethanol Oxidation Reaction ◽

Multiple Phase ◽

Reaction Performance

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Effect of Pd on the Electrocatalytic Activity of Pt towards Oxidation of Ethanol in Alkaline Solutions

Applied Sciences ◽

10.3390/app11031315 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1315

Author(s):

Salma Jadali ◽

Mohammad Ali Kamyabi ◽

José Solla-Gullón ◽

Enrique Herrero

Keyword(s):

Photoelectron Spectroscopy ◽

Electrocatalytic Activity ◽

Oxidation Reaction ◽

Ethanol Oxidation ◽

Aldol Condensation ◽

Pd Nanoparticles ◽

Alkaline Media ◽

Alkaline Solutions ◽

Ethanol Oxidation Reaction ◽

X Ray

The understanding of electrocatalytic activity and poisoning resistance properties of Pt and Pd nanoparticles, recognized as the best electrocatalysts for the ethanol oxidation reaction, is an essential step for the commercialization of direct ethanol fuel cells (DEFCs). In this paper, mono and bimetallic Pt and Pd nanoparticles with different atomic ratios have been synthesized to study their electrocatalytic properties for an ethanol oxidation reaction in alkaline solutions. The different nanoparticles were physiochemically characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The electrochemical characterization was performed by cyclic voltammetry and chronoamperometry measurements. The electrochemical measurements indicate that Pt nanoparticles have much higher electrocatalytic activity for ethanol oxidation than Pd nanoparticles. The studies with bimetallic PtPd nanoparticles showed a significant impact of their composition on the ethanol oxidation. Thus, the highest electrocatalytic activity and poisoning resistance properties were obtained for Pt3Pd2 nanoparticles. Moreover, this study demonstrates that the poisoning of the catalyst surface through ethanol oxidation is related to the prevalence of the acetaldehyde–acetate route and the polymerization of acetaldehyde through aldol condensation in the alkaline media.

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Enhanced Catalytic Activity for the Ethanol Oxidation Reaction (EOR) using Novel Pt-Fe3O4/MWCNT Bimetallic Electrocatalyst

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v17i2.425 ◽

2014 ◽

Vol 17 (2) ◽

pp. 067-070 ◽

Cited By ~ 4

Author(s):

P. C. Meléndez González ◽

Sagrario M. Montemayor ◽

D. Morales Acosta ◽

Y. Verde-Gómez ◽

B. Escobar ◽

...

Keyword(s):

Catalytic Activity ◽

Current Density ◽

Oxidation Reaction ◽

Ethanol Oxidation ◽

Weight Ratio ◽

Ethanol Oxidation Reaction ◽

Co Catalysts ◽

Degradation Test ◽

Anode Electrocatalysts ◽

Adsorption Desorption

In this work, 20% Pt-Fe3O4/MWCNT (Pt:Fe3O4 weight ratio of 80:20) and 20% Pt/MWCNT nanoparticles were synthesized and characterized as anode electrocatalysts in H2SO4 media. First, the electrocatalyst were submitted to accelerated catalyst degradation test (ACDT) by performing 500 cycles between 0.6 and 1.2 V (vs. SHE). Then, their performance for the EOR was evaluated. The magnetite-containing nanoparticles demonstrated to be highly electrochemically stable, with negligible surface area losses (less than 7%) in thehydrogen adsorption/desorption region. Moreover, Pt-Fe3O4/MWCNT showed a significantly enhanced catalytic activity for the EOR when compared to Pt/MWCNT, with almost 46% increase in current density when using Fe3O4 as co-catalysts.

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