On the enhancement of methanol and CO electro-oxidation by amorphous (NiNb)PtSnRu alloys versus bifunctional PtRu and PtSn alloys

Barranco, J.; Pierna, A.R.

doi:10.1016/j.jnoncrysol.2008.04.053

Cited by 22 publications

(17 citation statements)

References 9 publications

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“…By using a planetary mill (Retsch 400 PM) a mechanical alloying (MA) technique was carried out to obtain the amorphous metallic microparticulated alloys of atomic composition Ni 59 Nb 40 Pt 0.6 Cu 0.4 and Ni 59 Nb 40 Pt 0.6 Cu 0.2 Sn 0.2 . The atomic ratio is the best electrocatalytic results provided as described by Pierna et al 5–8. Subsequently, as soon as the time of alloying was finished, the obtained alloys are sieved to obtain the size of desired particle.…”

Section: Methodsmentioning

confidence: 84%

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Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys

Barroso

Pierna

Blanco

et al. 2011

Physica Status Solidi (a)

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This work has focused on the development of metallic amorphous microparticulated alloys of composition Ni59Nb40Pt0.6Cu0.4 and Ni59Nb40Pt0.6Cu0.2Sn0.2, obtained by mechanical alloying (MA), for use as anodes in direct alcohol fuel cells (DAFCs). The addition of copper modifies the electronic properties of platinum due to its special electronic configuration (3d104s1), demonstrating a better performance for ethanol/bioethanol electro‐oxidation. Ni59Nb40Pt0.6Cu0.4 alloy provides higher current densities than Ni59Nb40Pt0.6Cu0.2Sn0.2 alloy. In spite of tin significantly improving the tolerance to different adsorbed species such as CO, its presence does not improve the electro‐oxidation reaction due to limit the distribution of platinum atoms by the ligand effect, avoiding the final oxidation to CO2. In both alloys higher current densities were obtained for bioethanol electro‐oxidation than ethanol, due mainly to the presence of acetaldehyde, formic acid and another organic compounds (ppb), which may contribute to improvement of catalytic results.

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Section: Methodsmentioning

confidence: 84%

“…The addition of a second or even a third element as cocatalyst modifies the electronic properties of platinum. This will produce an increase in catalytic activity and improvement of tolerance to the adsorbed species, such as CO 5–8. These properties can be explained by the bifunctional mechanisms and electronic densities.…”

Section: Introductionmentioning

confidence: 99%

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys

Barroso

Pierna

Blanco

et al. 2011

Physica Status Solidi (a)

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“…Sistiaga et al started several exploratory works on the electrocatalytic performance of amorphous alloys, i.e., metallic glasses for the methanol oxidation. [139] Only limited assumptions could be made since no surface or structural characterization was provided to explain the difference. Barranco et al found after the HF pretreatment, (NiNb) 99 Pt 0.6 Sn 0.2 Ru 0.2 has a higher electrocatalytic activity at high methanol concentration while at low methanol concentration, (NiNb) 99 Pt 0.6 Sn 0.4 is superior.…”

Section: Methanol and Ethanol Oxidationmentioning

confidence: 99%

Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications

Doubek

McMillon‐Brown

et al. 2018

Advanced Materials

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transformers [2] and load bearing applications. [3] In the last few decades, the study of nanomaterials has become a central focus in nanoscience and nanotechnology. [4] In fact, many studies have shown that with reduction in size, nanomaterials display novel electrical, mechanical, chemical and optical properties, which are largely believed to be the result of surface and quantum confinement effects. [4,5] Remarkably, this trend has found traction in the metallic glass field where metallic glasses nanostructures (MGNs) demonstrate an important role in many applications such as light harvesting, [6] photovoltaic, [7] biomedical, [8] magneto-optical, [9] organic synthesis, [10] lithium-ion batteries [11] and electrocatalysis. [12] Recently, MGNs are receiving increased attention due to their distinguished performance, such as high activity and long term stability in electrocatalytic reactions. [12,13] Although several review papers have already covered the topic of nanopatterning of bulk metallic glasses (BMGs), [14][15][16] the correlation between recent synthetic methods and electrocatalytic applications for MGNs has not been thoroughly addressed. Moreover, there is currently no review that unites MGNs synthesized from different approaches (top-down and bottom-up) with conventional electrochemical reactions. Therefore, in this review our mission is to: 1) present a focused perspective on the latest fabrication techniques of MGNs toward the pursuit of novel electrocatalysts and electrodes; 2) highlight recent advances in computational screening and predictions that could be applied toward new metallic glass electrocatalyst discovery; and 3) report distinct advancements in electrocatalytic applications related to MGNs by creating a comprehensive discussion for commonly employed kinetic parameters and their connection with the unique material structure. Finally, as the first progress report on the metallic glass based electrocatalysts, we will also highlight some of the challenges that need to be addressed toward future progress in this field.BMGs are those metallic glasses (MGs) that can be made in 'bulk' scale with good glass forming abilities, [17] representing a versatile platform for many applications. To date, a wide range of BMG-forming alloys have been developed, including Zr-, [18] Fe-, [19] Cu-, [20] Ni-, [21] Ti-, [22] Mg-, [23] Pd-, [24] Au-, [25] and Pt-based compositions. [26] Moreover, the increased disorder brought by the higher degree of multinary systems is believed to contribute to improving the glass formation. [27] The evolution to multicomponent alloys of the most recent MG studies has also made them natural candidates for catalysis. The amorphous multinary Recent advances in metallic glass nanostructures (MGNs) are reported, covering a wide array of synthesis strategies, computational discovery, and design solutions that provide insight into distinct electrocatalytic applications. A brief introduction to the development and unique features of MGNs with an overview of top-down and bottom-up sy...

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“…Alloys with Ni 59 Nb 40 Pt 0.6 Rh 0. 4 and Ni 59 Nb 40 Pt 0.6 Rh 0.2 Ru 0.2 compositions were studied. The current density towards ethanol oxidation decreases with the presence of ruthenium; however, this electrode shows the best tolerance to CO, with lower surface coverage.…”

mentioning

confidence: 99%

“…Previous studies showed that PtRu combination improves the kinetics of CO oxidation in comparison to platinum as single catalytic metal, due to a bi-functional mechanism [3][4][5]. Ruthenium is able to provide OH species at a lower potential than for the case of platinum, with a significant reduction of the poisoning when this metal is present.…”

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confidence: 99%

Co‐catalytic effect of Rh and Ru for the ethanol electro‐oxidation in amorphous microparticulated alloys

Blanco

Pierna

Barroso

2011

Phys. Status Solidi C

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The ethanol electro‐oxidation on platinum catalyst in acid media leads to the formation of acetaldehyde and acetic acid as main products. Another problem is the poisoning of the electro‐catalyst surface with CO formed during the fuel oxidation reaction. To increase the performance of Direct Ethanol Fuel Cells (DEFCs) it is necessary to develop new electrode materials or modification of the existing Pt catalysts. This work presents the electrochemical response to ethanol and CO oxidation of different compositional amorphous alloys obtained by ball milling technique, used as electrodes. Alloys with Ni59Nb40Pt0.6Rh0.4 and Ni59Nb40Pt0.6Rh0.2Ru0.2 composi‐tions were studied. The current density towards ethanol oxidation decreases with the presence of ruthenium; however, this electrode shows the best tolerance to CO, with lower surface coverage (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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On the enhancement of methanol and CO electro-oxidation by amorphous (NiNb)PtSnRu alloys versus bifunctional PtRu and PtSn alloys

Cited by 22 publications

References 9 publications

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys

Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications

Co‐catalytic effect of Rh and Ru for the ethanol electro‐oxidation in amorphous microparticulated alloys

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On the enhancement of methanol and CO electro-oxidation by amorphous (NiNb)PtSnRu alloys versus bifunctional PtRu and PtSn alloys

Cited by 22 publications

References 9 publications

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni59Nb40Pt0.6Cu0.4 and Ni59Nb40Pt0.6Cu0.2Sn0.2 alloys

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni59Nb40Pt0.6Cu0.4 and Ni59Nb40Pt0.6Cu0.2Sn0.2 alloys

Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications

Co‐catalytic effect of Rh and Ru for the ethanol electro‐oxidation in amorphous microparticulated alloys

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Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys

Electro‐oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni₅₉Nb₄₀Pt_0.6Cu_0.4 and Ni₅₉Nb₄₀Pt_0.6Cu_0.2Sn_0.2 alloys