Size- and Composition-Dependent Enhancement of Electrocatalytic Oxygen Reduction Performance in Ultrathin Palladium–Gold (Pd1–xAux) Nanowires

Koenigsmann, Christopher; Sutter, Eli; Adžić, Radoslav R.; Wong, Stanislaus S.

doi:10.1021/jp306034d

Cited by 74 publications

(127 citation statements)

References 60 publications

(138 reference statements)

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“…First of all, the core-shell structure can greatly reduce the cost of the catalyst. Second, the strain caused by the lattice mismatch between the surface and core components may be used to modify the electronic properties of the surface metal atoms, most notably their d-band centres, which affect the rates of one or more elementary steps in the overall catalytic reaction [268][269][270].…”

Section: Core-shell Structuresmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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This review selectively summarizes the latest developments in the Pd-based cataysts for low temperature proton exchange membrane fuel cells, especially in the application of formic acid oxidation, alcohol oxidation and oxygen reduction reaction. The advantages and shortcomings of the Pd-based catalysts for electrocatalysis are analyzed. The influence of the structure and morphology of the Pd materials on the performance of the Pd-based catalysts were described. Finally, the perspectives of future trends on Pd-based catalysts for different applications were considered.

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Section: Core-shell Structuresmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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“…Subsequently, the precursors meet within the spatial confines of the polycarbonate membrane and react within the confined 1-D pore space, thereby forming the desired product. This synthetic technique has been extensively developed by our research group to generate a wide range of materials including but not limited to metals, metal oxides, phosphates, sulfides, and fluorides [3,20,22,25,28,29,31,38,41,42,[46][47][48][49][50][51]. The template-assisted U-tube method offers many advantages for the synthesis of 1-D nanostructures, since it is a simple and flexible methodology, often operating in aqueous media and yielding high-quality single-crystalline nanomaterials with high yield and with reliable control over composition, size, and shape.…”

Section: Introductionmentioning

confidence: 99%

Ambient synthesis, characterization, and electrochemical activity of LiFePO4 nanomaterials derived from iron phosphate intermediates

et al. 2015

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LiFePO 4 materials have become increasingly popular as a cathode material due to the many benefits they possess including thermal stability, durability, low cost, and long life span. Nevertheless, to broaden the general appeal of this material for practical electrochemical applications, it would be useful to develop a relatively mild, reasonably simple synthesis method of this cathode material. Herein, we describe a generalizable, 2-step methodology of sustainably synthesizing LiFePO 4 by incorporating a template-based, ambient, surfactantless, seedless, U-tube protocol in order to generate size and morphologically tailored, crystalline, phase-pure nanowires. The purity, composition, crystallinity, and intrinsic quality of these wires were systematically assessed using transmission electron microscopy (TEM), high-resolution TEM (HRTEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), selected area electron diffraction (SAED), energy dispersive analysis of X-rays (EDAX), and high-resolution synchrotron XRD. From these techniques, we were able to determine that there is an absence of any obvious defects present in our wires, supporting the viability of our synthetic approach. Electrochemical analysis was also employed to assess their electrochemical activity. Although our nanowires do not contain any noticeable impurities, we attribute their less than optimal electrochemical rigor to differences in the chemical bonding between our LiFePO 4 nanowires and their bulk-like counterparts. Specifically, we demonstrate for the first time experimentally that the Fe-O3 chemical bond plays an important role in determining the overall conductivity of the material, an assertion which is further supported by recent "first-principles" calculations. Nonetheless, our ambient, solution-based synthesis technique is capable of generating highly crystalline and phase-pure energy-storage-relevant nanowires that can be tailored so as to fabricate different sized materials of reproducible, reliable morphology.

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“…Palladium (Pd)-based nanocomposites have exhibited extraordinary performance in diverse applications such as hydrogenation reactions [5,77], photothermal therapy [78], cross-coupling reactions [79] and electrochemical reactions [80][81][82]. Pd and Pt are in the same group and Pd-Pt nanostructures have showed excellent electrocatalytic properties [37,83].…”

Section: Pd-based Nanocompositesmentioning

confidence: 99%

Noble Metal-Based Nanocomposites for Fuel Cells

Rong¹,

Zhang²,

Muhammad³

et al. 2018

Novel Nanomaterials - Synthesis and Applications

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Noble metal-based nanocomposites are attractive for a rich variety of electrocatalytic applications as they can exhibit not only a combination of the properties associated with each component but also synergy due to a strong coupling between different constituents. Using noble metal as the base component, a plenty of methods have been recently demonstrated for the synthesis of noble metal-based nanocomposites with novel structures (e.g., alloys, core-shell, skin and 1D/2D structures). In this chapter, an account of recent advances of synthetic approaches to noble metal-based nanocomposites with controlled structures, compositions and sizes are reviewed. The relationship between structures and electrochemical properties of these nanocomposites in fuel cell field is discussed. The potential future directions of research in the field are also addressed.

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Size- and Composition-Dependent Enhancement of Electrocatalytic Oxygen Reduction Performance in Ultrathin Palladium–Gold (Pd_1–xAu_x) Nanowires

Cited by 74 publications

References 60 publications

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Ambient synthesis, characterization, and electrochemical activity of LiFePO4 nanomaterials derived from iron phosphate intermediates

Noble Metal-Based Nanocomposites for Fuel Cells

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