High‐Performance Ordered PdCuFe/C Intermetallic Catalyst for Electrochemical Oxygen Reduction in Proton Exchange Membrane Fuel Cells

Ji, Xiangdong; Gao, Peng; Zhang, Libo; Wang, Xiaoran; Wang, Fanghui; Zhu, Hong; Yu, Jinghua

doi:10.1002/celc.201900390

Cited by 15 publications

(13 citation statements)

References 39 publications

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“…In recent years, extensive efforts have been dedicated to the improvement of ORR activities in alkaline media. ,,,,,, Unlike acidic solutions, the alkaline media confer many beneficial features to ORR, such as the reduced adsorption energies of anions, the surface-independent outer-sphere electron transfer processes in its initial stage which enables the utilization of a wide range of non-Pt catalysts, less corrosive environment to the catalysts, and more importantly, much faster kinetics . Just like the case in acidic media, alloying a transition metal M″ into Pd will result in electronic structure modifications (e.g., the d-band shift) that will directly affect the catalyst-adsorbate bond strength. , Reports from previous studies already suggest that many Pd, Pd-based random alloys (such as Pd–Ag, Pd–Ir, and Pd–Cu) and Pd-based intermetallic (such as Pd–Cu, , Pd–Pb, ,,, Pd–Bi, Pd–Fe, Pd–Cu–Co, Pd–Cu–Fe, Au–O–PdZn, and Pd–Cu–Au) nanocatalysts exhibit superior alkaline ORR performance than Pt. Some particular results in this aspect are recounted as follows.…”

Section: Applications Of Random Alloy and Intermetallic Nanocrystalsmentioning

confidence: 99%

Noble-Metal Based Random Alloy and Intermetallic Nanocrystals: Syntheses and Applications

2020

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Precise control over the size, shape, composition, structure, and crystal phase of random alloy and intermetallic nanocrystals has been intensively explored in technologically important applications in recent years. Different from the monometallic nanocrystals and other types of structural nanocrystals such as core−shell and heterostructured nanocrystals, well-defined multimetallic random alloy and intermetallic nanocrystals exhibit unique and intriguing physicochemical properties, serving as ideal models for benefiting the structure-to-property studies. As such, random alloy and intermetallic nanocrystals have attracted extensive attention and interest in scientific research and shown huge potential in various fields. In this review, we focus specifically on summarizing the synthetic principles and strategies developed to form random alloy and intermetallic nanocrystals with enhanced performance. Some representative examples are purposely selected for emphasizing basic concepts and mechanistic understanding. We then highlight the fascinating properties and widespread applications of random alloy and intermetallic nanocrystals in electrocatalysis, heterogeneous catalysis, optical and photocatalysis, as well as magnetism and conclude the review by addressing the prospects and current challenges for the controlled synthesis of random alloy and intermetallic nanocrystals.

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Section: Applications Of Random Alloy and Intermetallic Nanocrystalsmentioning

confidence: 99%

Noble-Metal Based Random Alloy and Intermetallic Nanocrystals: Syntheses and Applications

2020

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“…[ 58 ] However, when introducing Rh or Fe metals, the phase transition temperature was increased to 500 °C, indicating that the Rh and Fe elements can inhibit the phase transformation of PdCu nanoparticles (Figure 5b,c). [13e,59] Due to the strong interatomic interaction, these intermetallic nanoparticles showed the enhanced performance in many electrocatalytic reactions, such as ORR and EOR. In terms of other Pd‐based intermetallics, Cui et al explored the annealing conditions controlled the ordered behavior of Pd 3 Fe nanoparticles [13a] .…”

Section: Advanced Regulation Of Pd‐based Nanomaterials For the Enhanced Electrocatalysismentioning

confidence: 99%

Section: Advanced Regulation Of Pd‐based Nanomaterials For the Enhanced Electrocatalysismentioning

confidence: 99%

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Structural Regulation of Pd‐Based Nanoalloys for Advanced Electrocatalysis

Xia

Luo

et al. 2021

Small Science

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Palladium (Pd)‐based materials have attracted increasing attentions as a kind of novel candidate catalysts for many electrocatalytic reactions to replace classic platinum (Pt) catalysts, especially in the fuel cell‐related electrocatalysis. However, the requirement of high activity and stability toward further practical applications makes the development of Pd‐based catalysts cease to advance. Combining alloying and structure‐controlled strategies has well addressed this challenge by optimizing the adsorption/desorption behaviors toward reaction intermediates. Herein, the recent advances of rational structural designs in terms of tuning the dimensionalities of Pd‐based nanoalloys are overviewed. To further enhance the intrinsic electrocatalytic activity, several advanced strategies, including intermetallics, doping, defects, surface, and interface engineering, are presented to engineer the electronic and/or physical properties of Pd‐based electrocatalysts. Using typical electrocatalytic reactions as probes, the significance of structural regulation of Pd‐based nanocrystals on the enhanced electrocatalysis is demonstrated. Finally, several possible trends and challenges for future advanced research directions are presented. It is anticipated that the rational structural regulation can make promising Pd‐based catalysts touch the ceiling of electrocatalytic activity and stability.

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“…For example, the trimetallic PdCuFe catalysts, which are much cheaper than Pt‐based catalysts,demonstrated Pt‐like ORR activity after converting into the highly ordered 0D WDNs. [ 163 ] Although the highly ordered intermetallic compound is preferred due to its well‐defined 0D nanostructure and considerable electrocatalytic activity, it should be noted that the synthesis of these catalysts usually requires high‐temperature annealing, which, however, leads to the aggregation of metal nanoparticles, that is, big particle size and thus low surface area. The confined strategies during annealing will help limit the excessive growth of intermetallic nanoparticles.…”

Section: Well‐defined Nanostructures For Electrocatalysis and Photoelectrocatalysismentioning

confidence: 99%

Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

Adekoya

et al. 2020

Advanced Energy Materials

141

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existing energy supply systems mainly based on fossil fuels, the performance of the clean energy (conversion and storage) devices/systems has to be significantly improved. The electrochemical energy conversion and storage usually involves many intricate chemical reactions and physical interactions at the surface and inside of electrodes/electrolytes, and the kinetics and transport behaviors of different carriers (e.g., electrons, holes, ions, molecules) are closely associated with the materials selected for electrodes as well as the structures of electrodes. To this point, material design and structure design for electrodes have been the research focuses for improving the electrochemical performance of energy conversion and storage, which both have gained high attention from academia and industry.Along with researches for finding advanced electrode materials, much recent research efforts have been made for electrode structure design and engineering, especially when traditional macro-scale structured electrodes are showing limitations of achieving satisfying performance for energy conversion and storage. Among these efforts, electrode nanostructuring has been demonstrated as a promising way for realizing highperformance electrochemical energy conversion and storage, which attributes the distinct features of nanostructured materials differing from their bulk material counterparts. The high surface-to-volume ratios of nanostructures give large electrochemical surface areas with much more exposed atoms and hence improve the performance per unit electrode area and/or Electrochemical energy conversion and storage play crucial roles in meeting the increasing demand for renewable, portable, and affordable power supplies for society. The rapid development of nanostructured materials provides an alternative route by virtue of their unique and promising effects emerging at nanoscale. In addition to finding advanced materials, structure design and engineering of electrodes improves the electrochemical performance and the resultant commercial competitivity. Regarding the structural engineering, controlling the geometrical parameters (i.e., size, shape, heteroarchitecture, and spatial arrangement) of nanostructures and thus forming well-defined nanostructure (WDN) electrodes have been the central aspects of investigations and practical applications. This review discusses the fundamental aspects and concept of WDNs for energy conversion and storage, with a strong emphasis on illuminating the relationship between the structural characteristics and the resultant electrochemical superiorities. Key strategies for actualizing well-defined features in nanostructures are summarized. Electrocatalysis and photoelectrocatalysis (for energy conversion) as well as metal-ion batteries and supercapacitors (for energy storage) are selected to illustrate the superiorities of WDNs in electrochemical reactions and charge carrier transportation. Finally, conclusions and perspectives regarding future research, development, and applications of WDNs...

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High‐Performance Ordered PdCuFe/C Intermetallic Catalyst for Electrochemical Oxygen Reduction in Proton Exchange Membrane Fuel Cells

Cited by 15 publications

References 39 publications

Noble-Metal Based Random Alloy and Intermetallic Nanocrystals: Syntheses and Applications

Noble-Metal Based Random Alloy and Intermetallic Nanocrystals: Syntheses and Applications

Structural Regulation of Pd‐Based Nanoalloys for Advanced Electrocatalysis

Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

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