Au(111)-Supported Pt Monolayer as the Most Active Electrocatalyst toward Hydrogen Oxidation and Evolution Reactions in Sulfuric Acid

Liao, Wen Bo; Yau, Shuehlin

doi:10.1021/acs.jpcc.7b05259

Cited by 18 publications

(27 citation statements)

References 43 publications

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“…On the other hand, how the electrocatalyst’s structure affects the HOR activity was analyzed by Liao et al [ 269 ], who evaluated the catalytic activity of a Pt monolayer deposited on an Au (111) substrate. Moreover, they found two relevant structures, well-defined hexagons (R-phase) and Moire structures (M-phase) ( Figure 20 ).…”

Section: Electrocatalysts and Electrodesmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.

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Section: Electrocatalysts and Electrodesmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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“…Also, Liao et al. showed that Au(111) supported Pt monolayers had a higher activity towards hydrogen evolution and oxidation than Pt(111). The authors ascribed this behavior to a larger interatomic spacing in the Pt monolayers.…”

Section: Introductionmentioning

confidence: 99%

“…The nanosheets exhibited better catalytic activity than the nanoparticles, in part because they had a larger surface area, and also because the of the closer contact between the nanosheets and the surface of the substrate, making the electronic transfer faster than with nanoparticles. Also, Liao et al [26] showed that Au(111) supported Pt monolayers had a higher activity towards hydrogen evolution and oxidation than Pt(111). The authors ascribed this behavior to a larger interatomic spacing in the Pt monolayers.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Activity of Galvanostatically Deposited Ni Thin Films for Methanol Electrooxidation

et al. 2019

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Nickel and nickel‐based nanomaterials are an attractive choice to replace noble metals as electrocatalysts in alkaline direct alcohol fuel cells (ADAFCs) owing to their lower cost and suitable electrocatalytic activity. Among the different synthetic methods available for the production of nanostructured materials, galvanostatic electrodeposition offers a fast and simple means of fabricating active electrodes. Therefore, thin‐layers of nickel were electrodeposited onto polycrystalline gold electrodes using constant current pulses from an electrolyte containing 50 mM NiSO4. Combined effects of current density pulse and the presence of sulfate or chloride anions in the supporting electrolyte on the electrocatalytic activity of the deposited nickel nanostructures were studied. The surface concentration of Ni(OH)2 in alkaline medium, evaluated through cyclic voltammetry in 0.5M methanol + 1M KOH, was used as a performance parameter together with the electrocatalytic intensity, EI, defined as the sum of forward and reverse currents densities in methanol electro‐oxidation. It was found that highest electrocatalytic activities were obtained when using current density pulses close to 4.0 × 10−3A cm−2 in the presence of sulfates, which leads to a strong correlation between the electrocatalytic activity for the oxidation of methanol and the surface concentration of Ni(OH)2, displaying better properties than their chloride counterparts.

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“…Their deposits exhibit similar activity to the ones of this work, even though the deposition times used by them are two orders of magnitude longer. The larger activity of the electrodeposited Ni thin films may be explained by the work of Liao et al [38]. They found that the electrocatalytic activity of Au(111) supported Pt monolayer films towardss hydrogen oxidation and evolution was larger than the electrocatalytic activity of Pt(111).…”

Section: Synthesismentioning

confidence: 99%

Electrocatalytic Activity of Galvanostatically Deposited Ni thin Films for Methanol Electrooxidation

Salinas-Quezada¹,

Crespo‐Yapur²,

Cano-Marquez³

et al. 2019

Preprint

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Nickel and nickel-based nanomaterials are an attractive choice to replace noble metals as electrocatalyst in alkaline direct alcohol fuel cells (DAFCs) owing to their lower cost and suitable electrocatalytic activity. Among the different synthetic methods available for the production of nanostructured materials, galvanostatic electrodeposition offers a fast and simple means of fabricating active electrodes. Therefore, thin-layers of nickel were electrodeposited onto polycrystalline gold electrodes using constant current pulses from an electrolyte containing 50 mM NiSO4. The electrocatalytic properties of the nickel nanostructures in alkaline medium, in which the catalytic species NiOOH is formed, were evaluated through cyclic voltammetry in 0.5 M methanol + 1 M KOH. The effects of current density pulse and the presence of sulfate or chloride anions in the supporting electrolyte on the electrocatalytic activity of the deposits were studied using Ni(OH)2 surface concentration, Gamma, and electrocatalytic intensity, EI, as performance parameters. It was found that highest electrolcatalytic activities were obtained when using current densities pulses close to 4.0 mA/cm2 in the presence of sulfates. It was found that the presence of sulfates leads to a strong correlation between the electrocatalytic activity for the oxidation of methanol and the surface concentration of Ni(OH)2.

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Au(111)-Supported Pt Monolayer as the Most Active Electrocatalyst toward Hydrogen Oxidation and Evolution Reactions in Sulfuric Acid

Cited by 18 publications

References 43 publications

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Electrocatalytic Activity of Galvanostatically Deposited Ni Thin Films for Methanol Electrooxidation

Electrocatalytic Activity of Galvanostatically Deposited Ni thin Films for Methanol Electrooxidation

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