Ultrathin and defect-rich intermetallic Pd<sub>2</sub>Sn nanosheets for efficient oxygen reduction electrocatalysis

Liang, Jiashun; Li, Shenzhou; Chen, Yawei; Liu, Xuan; Wang, Tanyuan; Han, Jiantao; Jiao, Shuhong; Cao, Ruiguo; Li, Qing

doi:10.1039/d0ta01767a

Cited by 57 publications

(48 citation statements)

References 24 publications

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“…Furthermore, Li and co‐workers fabricated defect‐rich ultrathin intermetallic Pd 2 Sn nanosheets ( Figure a–c). [ 121 ] The as‐prepared ultrathin intermetallic Pd 2 Sn nanosheets presented excellent electrocatalytic performance for the ORR with a mass activity of 2.5 A mg −1 , which was higher than that of most Pd‐based composites reported to date (Figure 16d,e). Mechanistic studies revealed that the ligand effect caused by the thermodynamically stable intermetallic nanostructure significantly contributed to promoting electrocatalytic performance.…”

Section: Key Advantages Of 2d Pd‐based Nanocatalystsmentioning

confidence: 83%

Section: Summary and Perspectivementioning

confidence: 99%

mentioning

confidence: 99%

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Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Shang

Wang

et al. 2021

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Pd‐ and Pd‐based catalysts have emerged as potential alternatives to Pt‐ and Pt‐based catalysts for numerous electrocatalytic reactions, particularly fuel cell‐related reactions, including the anodic fuel oxidation reaction (FOR) and cathodic oxygen reduction reaction (ORR). The creation of Pd‐ and Pd‐based architectures with large surface areas, numerous low‐coordinated atoms, and high density of defects and edges is the most promising strategy for improving the electrocatalytic performance of fuel cells. Recently, 2D Pd‐based nanomaterials with single or few atom thickness have attracted increasing interest as potential candidates for both the ORR and FOR, owing to their remarkable advantages, including high intrinsic activity, high electron mobility, and straightforward surface functionalization. In this review, the recent advances in 2D Pd‐based nanomaterials for the FOR and ORR are summarized. A fundamental understanding of the FOR and ORR is elaborated. Subsequently, the advantages and latest advances in 2D Pd‐based nanomaterials for the FOR and ORR are scientifically and systematically summarized. A systematic discussion of the synthesis methods is also included which should guide researchers toward more efficient 2D Pd‐based electrocatalysts. Lastly, the future outlook and trends in the development of 2D Pd‐based nanomaterials toward fuel cell development are also presented.

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Section: Key Advantages Of 2d Pd‐based Nanocatalystsmentioning

confidence: 83%

Section: Summary and Perspectivementioning

confidence: 99%

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Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Shang

Wang

et al. 2021

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“…This strategy is also believed to show enormous potential to produce many other Pd‐based intermetallic nanostructures. Moreover, to the best of our knowledge the ultrathin two‐dimensional porous nanosheets with ordered atomic arrangement have rarely been reported, which are expected to show outstanding catalytic performance [6b] …”

Section: Resultsmentioning

confidence: 99%

Template‐Directed Rapid Synthesis of Pd‐Based Ultrathin Porous Intermetallic Nanosheets for Efficient Oxygen Reduction

et al. 2021

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Atomically ordered intermetallic nanoparticles exhibit improved catalytic activity and durability relative to random alloy counterparts. However, conventional methods with time‐consuming and high‐temperature syntheses only have rudimentary capability in controlling the structure of intermetallic nanoparticles, hindering advances of intermetallic nanocatalysts. We report a template‐directed strategy for rapid synthesis of Pd‐based (PdM, M=Pb, Sn and Cd) ultrathin porous intermetallic nanosheets (UPINs) with tunable sizes. This strategy uses preformed seeds, which act as the template to control the deposition of foreign atoms and the subsequent interatomic diffusion. Using the oxygen reduction reaction (ORR) as a model reaction, the as‐synthesized Pd3Pb UPINs exhibit superior activity, durability, and methanol tolerance. The favored geometrical structure and interatomic interaction between Pd and Pb in Pd3Pb UPINs are concluded to account for the enhanced ORR performance.

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“…Interestingly, curved lattice and fuzzy lattice can be observed in some regions, indicating the existence of lattice defects, which would be because of the diffusion of other atoms or Pd atoms′ migration in the Pd lattice. [14] Also, post TiO 2 modification, visible holes formed on the surface of Pd NS (Figure 1B1,B2). The dynamic light scattering (DLS) analysis was carried out to determine the size distribution of Pd NS and Pd@TiO 2 .…”

Section: Formation and Characterization Of Pd@tiomentioning

confidence: 93%

Nanozyme with Robust Catalase Activity by Multiple Mechanisms and Its Application for Hypoxic Tumor Treatment

Wang

Yang

et al. 2021

Adv Healthcare Materials

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Utilizing catalase-mimicking nanozymes to produce O 2 is an effective method to overcome tumor hypoxia. However, it is challenging to fabricate nanozymes with ultrahigh catalytic activity. Palladium nanosheet (Pd NS), a photothermal agent for photothermal therapy (PTT), has superior catalase-mimicking activity. Here, titanium dioxide (TiO 2 ) is used to modify Pd NS (denoted Pd@TiO 2 ) by a simple one-step method to improve its catalytic activity about 8 times. The enhancement mechanism's fundamental insights are discussed through experiments and density functional theory calculations. Next, zinc phthalocyanine is loaded on Pd@TiO 2 to form a nanomotor (denoted PTZCs) with the synergistic activities of photodynamic therapy and PTT. PTZCs inherit the catalase activity of Pd@TiO 2 to facilitate the decomposition of endogenous H 2 O 2 to O 2 , which can relieve tumor hypoxia and propel PTZC migration to expand the reach of PTZCs, further enhancing its synergistic treatment outcome both in vitro and in vivo. It is proposed that this work can provide a simple and effective strategy for catalytic activity enhancement and bring a critical new perspective to studying and guiding the nanozyme design.

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Ultrathin and defect-rich intermetallic Pd₂Sn nanosheets for efficient oxygen reduction electrocatalysis

Abstract: Ultrathin and defect-rich Pd2Sn intermetallic nanosheets with unique Pd–Sn ordering are developed and display much enhanced activity and stability towards oxygen reduction in an alkaline medium.

Cited by 57 publications

References 24 publications

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Template‐Directed Rapid Synthesis of Pd‐Based Ultrathin Porous Intermetallic Nanosheets for Efficient Oxygen Reduction

Nanozyme with Robust Catalase Activity by Multiple Mechanisms and Its Application for Hypoxic Tumor Treatment

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Ultrathin and defect-rich intermetallic Pd2Sn nanosheets for efficient oxygen reduction electrocatalysis

Abstract: Ultrathin and defect-rich Pd2Sn intermetallic nanosheets with unique Pd–Sn ordering are developed and display much enhanced activity and stability towards oxygen reduction in an alkaline medium.

Cited by 57 publications

References 24 publications

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Template‐Directed Rapid Synthesis of Pd‐Based Ultrathin Porous Intermetallic Nanosheets for Efficient Oxygen Reduction

Nanozyme with Robust Catalase Activity by Multiple Mechanisms and Its Application for Hypoxic Tumor Treatment

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Ultrathin and defect-rich intermetallic Pd₂Sn nanosheets for efficient oxygen reduction electrocatalysis