Methanol Oxidation on Graphenic-Supported Platinum Catalysts

Arteaga, Gladys; Gavidia, Luis Miguel Rivera; Martínez, Sthephanie J.; Rizo, Rubén; Pastor, E.; Garcı́a, Gonzalo

doi:10.3390/surfaces2010002

Cited by 31 publications

(14 citation statements)

References 39 publications

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“…and lattice defects (vacancies, holes), which provide favorable sites for the anchoring and nucleation of metal NPs. . This strong metal‐graphene substrate interaction leads to improved durability of the supported‐NPs.…”

Section: Shape‐controlled Metal Nanoparticles For the Eormentioning

confidence: 99%

“…Predominantly exposed facets Metallic precursors [a] Surfactant [b] Reducing agent (carbonyls, epoxides, hydroxyls, etc.) and lattice defects (vacancies, holes), which provide favorable sites for the anchoring and nucleation of metal NPs.. [75][76][77][78] This strong metal-graphene substrate interaction leads to improved durability of the supported-NPs. Additionally, graphene has a fast 2D electrontransfer kinetics resulting in enhanced activities for electrochemical reactions.…”

Section: Shapementioning

confidence: 99%

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Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

2019

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Direct ethanol fuel cells are a promising technology for clean energy production. The ethanol oxidation reaction (EOR) is surface sensitive and, hence, the study of single‐crystal electrodes provides fundamental knowledge of the different activity of the metal crystal planes. However, for practical applications, metal nanoparticles dispersed on a porous support are generally used to enhance the efficiency and to reduce the catalyst cost. Although some research has been devoted to the development of shape‐controlled nanoparticles, the finding of an efficient, cost‐effective, and easily scaled‐up catalytic system remains a challenge. Furthermore, the use of a suitable support with a well‐defined nanoarchitecture is essential for the control of the catalyst reactivity. In this Review, a general overview of the performance of single‐crystal electrodes and unsupported/supported shape‐controlled nanoparticles for the EOR is presented, paying special attention to Pt surfaces. Finally, the major challenges and directions for future research are also discussed to guide the design of efficient shape‐controlled catalysts for the EOR.

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Section: Shape‐controlled Metal Nanoparticles For the Eormentioning

confidence: 99%

Section: Shapementioning

confidence: 99%

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

2019

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“…Therefore, it is For comparing the obtained results with the literature, a comparison table was added. Table 2 summarizes the comparison between the characteristics of the prepared modified carbon paste electrode and some previously modified electrodes [36][37][38][39]. As shown, the prepared modified electrode in this research has acceptable performance for methanol oxidation in acidic medium compared to other ones.…”

Section: The Ni-mmt/cpe Ability In Re-oxidation Of Methanolmentioning

confidence: 79%

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

et al. 2019

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Direct methanol fuel cell is claiming to be the most main power source in future as a clean energy source, for which methanol is used as fuel. In the present study, nickel nanoparticles were synthesized by green route in the presence of montmorillonite (Ni-MMT). Then the electrochemical activity of prepared nanocomposite was investigated in methanol oxidation reaction in acidic medium. In the process of nickel nanoparticle synthesis, the natural substrate montmorillonite was used as capping agent and Allium jesdianum water extract was used as the source of reducing agent for the first time. The Ni-MMT sample was characterized by UV-Vis, XRD, SEM and EDX techniques. Production of nickel nanoparticles in the proposed green method is confirmed by absorption peak of 405 nm in UV-Vis spectrum. The average particle size of Ni-MMT was determined as 20.80 nm. The oxidation of methanol in acidic medium was studied by cyclic voltammetry using Ni-MMTmodified carbon paste electrode (Ni-MMT/CPE). Methanol was oxidized on the modified electrode surface at 0.3 V. Also, the catalytic current of methanol oxidation was 3 mA in H 2 SO 4 electrolyte which is significantly more than unmodified CPE. The concentration of 0.5 M for H 2 SO 4 was obtained as the optimum electrolyte for the oxidation of methanol. Methanol can be catalyzed in the concentration range of 0.1-0.5 M by the prepared nanostructured catalyst. Graphic abstractNi nanoparticles in montmorillonite (Ni-MMT) which was prepared by Allium jesdianum extract have a good electrocatalytic effect on methanol oxidation.

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“…e ratio should be in the following order: CI-WATER (0.83) > CI-IPA (1/2) (0.70 > CI-IPA (1/1) (0.58) ≈ CI-IPA (1/0.5) (0.57). According to previous research [57,58], in acid media, CI-IPA may have electroactivity higher and lower stability than CI-WATER ink do. In alkaline media, the arrangement of the I F was as follows: CI-WATER (3951 mA mg Pt 2).…”

Section: Electrochemical Measurementmentioning

confidence: 92%

Influence of Solvents on the Electroactivity of PtAl/rGO Catalyst Inks and Anode in Direct Ethanol Fuel Cell

Vu¹,

Nguyen²,

Ngoc³

2021

Journal of Chemistry

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This paper presents research on the effects of common solvents such as n-butyl acetate, isopropanol, and ethanol on the properties and electroactivity of catalyst ink based on PtAl/rGO. The inks prepared by mixing PtAl/rGO catalyst, Nafion solution (5 wt%), and solvent were coated on carbon cloth by the spin coating method. The results obtained showed that ethanol was the most suitable solvent for the preparation of catalyst ink with a volume ratio between catalyst slurry and solvent of 1 : 1 (CI-EtOH (1/1) ink). The surface of the CI-EtOH (1/1) coated electrode was smooth, flat, and even and had no cracks due to the increase of Nafion mobility, resulting in significant improvement in the interaction between Pt particles and ionomer. Moreover, the electrochemical activity of the CI-EtOH (1/1) ink in ethanol electrooxidation reaction, in both acidic and alkaline media, has the highest value, with the forward current density, IF, reaching 1793 mA mgPt−1 and 4751 mA mgPt−1, respectively. In the application in direct ethanol fuel cell (DEFC), the CI-EtOH ink-coated anode also exhibited the highest power density in both PEM-DEFC (with a proton exchange membrane) and AEM-DEFC (with an anion exchange membrane) at 19.10 mW cm−2 and 27.07 mW cm−2, respectively.

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Methanol Oxidation on Graphenic-Supported Platinum Catalysts

Cited by 31 publications

References 39 publications

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

Influence of Solvents on the Electroactivity of PtAl/rGO Catalyst Inks and Anode in Direct Ethanol Fuel Cell

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