Ethanol and CO electro-oxidation with amorphous alloys as electrodes

Blanco, T.C.; Pierna, A.R.; Barroso, Javier

doi:10.1016/j.jpowsour.2010.12.018

Cited by 18 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon monoxide (CO) oxidation to carbon dioxide (CO 2 ) is one of the most studied reactions in heterogeneous catalysis. , CO is usually known as the most common product intermediate in catalysis, causing catalyst activity reduction by blocking catalyst activation centers. ,, Figure a also shows an onset oxidation potential of Ni 2+ of +0.34 V vs Ag/AgCl and a current density of 350 mA cm –2 for CO oxidation for NiO/NF, implying superior performance when compared to previous reports …”

Section: Resultssupporting

confidence: 77%

“…39,50,51 Figure 7a also shows an onset oxidation potential of Ni 2+ of +0.34 V vs Ag/AgCl and a current density of 350 mA cm −2 for CO oxidation for NiO/ NF, implying superior performance when compared to previous reports. 52 To evaluate the effect of CO on the performance of NiO/ NF, EIS, CV, and long-term experiments were carried out in the absence and presence of CO in the 1.0 M KOH solution (Figure 7). From Figure 7, it can be seen that the peak potential at +0.45 V vs Ag/AgCl can be attributed to NiOOH and it becomes more distinctive during CO oxidation, suggesting a possible interaction between NiOOH surface active sites and CO molecules (Figure 7a).…”

Section: Nickel-based Catalysts In Alkaline Electrolytes (See Tablementioning

confidence: 99%

See 1 more Smart Citation

Ultrasonically Surface-Activated Nickel Foam as a Highly Efficient Monolith Electrode for the Catalytic Oxidation of Methanol to Formate

Abdullah

Hameed

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Most of the current electrocatalysts for the methanol oxidation reaction are precious group metals such as Pt, Pd, and Ru. However, their use is limited due to their high cost, scarcity, and issues with carbon monoxide poisoning. We developed a simple method to prepare a nickel foam (NF)-based monolith electrode with a NiO nanosheet array structure as an efficient electrocatalyst toward the oxidation of methanol to produce formate. By a simple ultrasonic acid treatment and air oxidation at room temperature, an inert NF was converted to NiO/NF as a catalytically active electrode due to the uniform NiO nanosheet array that was rapidly formed on the surface of NiO/NF. In alkaline electrolytes containing methanol, the as-prepared NiO/NF catalysts exhibited a lower methanol oxidation reaction (MOR) potential of +1.53 V vs RHE at 100 mA cm −2 compared to that of inert NF samples. The difference in potentials between the E MOR and the E OER at that current density was found to be 280 mV, indicating that methanol oxidation occurred at lower potentials as compared to the oxygen evolution reaction (OER). We also observed that the NiO/NF could also efficiently catalyze the oxidation of CO without being poisoned by it. NiO/NF retained close to 100% of its initial activity after 20,000 s of methanol oxidation tests at high current densities above 200 mA cm −2 . Because of the simple synthesis method and the enhanced catalytic performance and stability of NiO/NF, this allows methanol to be used as an OER masking agent for the energy-efficient generation of value-added products such as formic acid and hydrogen.

show abstract

Section: Resultssupporting

confidence: 77%

Section: Nickel-based Catalysts In Alkaline Electrolytes (See Tablementioning

confidence: 99%

Ultrasonically Surface-Activated Nickel Foam as a Highly Efficient Monolith Electrode for the Catalytic Oxidation of Methanol to Formate

Abdullah

Hameed

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Surprisingly, the peak at 1.548 V versus RHE (corresponding to β-NiOOH and CuOOH) has become distinct during CO oxidation, revealing a possible interaction between CO molecules and β-NiOOH and CuOOH surface sites. Figure also reveals an onset potential of 1.398 V vs RHE and current density of 28 mA/cm 2 , which is found to be superior to previous reports. , Basically, the CO oxidation on such surfaces follow Eley–Rideal mechanism in which the CO species (not adsorbed) reacts with previously adsorbed O 2 species . A similar mechanism has been observed in the present case, where the presence of excess O 2 molecules does not change the behavior of the voltammogram.…”

Section: Resultssupporting

confidence: 70%

“…Figure 7 also reveals an onset potential of 1.398 V vs RHE and current density of 28 mA/cm 2 , which is found to be superior to previous reports. 48,49 Basically, the CO oxidation on such surfaces follow Eley−Rideal mechanism in which the CO species (not adsorbed) reacts with previously adsorbed O 2 species. 50 A similar mechanism has been observed in the present case, where the presence of excess O 2 molecules does not change the behavior of the voltammogram.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Low Density Three-Dimensional Metal Foams as Significant Electrocatalysts toward Methanol Oxidation Reaction

Sesu

Patil

Lokanathan

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Transition metals have emerged as highly active catalysts for methanol oxidation reaction. The development of low-density metallic foams is exceedingly intriguing for various applications. Here, we report a systematic design of three-dimensional (3D) porous nanocomposites (foam) of transition metals like Cu and Ni with reduced graphite oxide (Cu–Ni@rGO) using simple self-propagation combustion method, where Cu–Ni foam structures are wrapped around reduced graphite oxide. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) show nanoporous structural morphology. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) show presence of different oxidation states of metal ions and phase formation, respectively. The electrochemical studies of Cu–Ni@rGO nanocomposites exhibit interesting methanol electrooxidation properties with exciting current density of 280 mA/cm2, which further retain 95% of their activity even after 600 s. In addition, these, Cu–Ni@rGO structures also reveal negligible poisoning effects during methanol electrooxidation. More interestingly, Cu–Ni@rGO nanocomposites show remarkable electrochemical CO oxidation to form CO2 and the evidence supports the Eley–Rideal mechanism of CO oxidation, where the presence of oxygen does not affect the oxidation process.

show abstract

“…Direct alcohol fuel cells have received attention in the last decade for applications in portable power due to their high energy density, easy handling, low operational temperature and fast start‐up . Among the alcohols, ethanol is considered to be a green fuel obtained in large amounts from agricultural products or biomass fermentation.…”

Section: Introductionmentioning

confidence: 99%

Direct Ethanol Membraneless Nanofluidic Fuel Cell With High Performance

et al. 2016

View full text Add to dashboard Cite

An air‐breathing nanofluidic fuel cell (AB‐NFC) was evaluated using ethanol as the fuel. Two Pd electrocatalysts, one commercial (ETEK) and one synthesized (Pd IL), were tested as anodes and using carbon nanofoam as three‐dimensional flow‐through electrodes. It was found from the polarization and power density curves that despite differences in particle sizes, both of the electrocatalysts exhibited similar power densities in an alkaline AB‐NFC (15.4 to 15.8 mW cm−2). Nevertheless, the Pd IL provided stability over time to the AB‐NFC while performing at a higher ethanol concentration (1.5 M), which was related to its greater tolerance to poisoning compared to the commercial Pd. The cell performance of the AB‐NFC was enhanced by changing the pH of the cathodic electrolyte from an alkaline to an acidic pH. The net cell efficiency increased 44 % with a power density near 100 mW cm−2, which is one of the best power densities reported to date for membraneless micro/nanofluidic fuel cells.

show abstract

Ethanol and CO electro-oxidation with amorphous alloys as electrodes

Cited by 18 publications

References 22 publications

Ultrasonically Surface-Activated Nickel Foam as a Highly Efficient Monolith Electrode for the Catalytic Oxidation of Methanol to Formate

Ultrasonically Surface-Activated Nickel Foam as a Highly Efficient Monolith Electrode for the Catalytic Oxidation of Methanol to Formate

Low Density Three-Dimensional Metal Foams as Significant Electrocatalysts toward Methanol Oxidation Reaction

Direct Ethanol Membraneless Nanofluidic Fuel Cell With High Performance

Contact Info

Product

Resources

About