Ionic Liquid-Derived Ultrafine Pt Nanoparticles with a Uniformly Dispersed State for Long-Life Oxygen Electroreduction

Qi, Li; Song, Shizhu; Wang, Yanqing

doi:10.1021/acssuschemeng.1c05572

Cited by 6 publications

(3 citation statements)

References 40 publications

(56 reference statements)

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“…Many groups have exploited PILs as stabilizers for metal ions and surface modifiers to fabricate metal-loaded carbon materials. − Li et al synthesized a novel Fe-containing IL that can homogeneously disperse Pt ions into useful precursors . Subsequently, controlled pyrolysis forms N-doped hollow carbon sphere (NHCS)-supported (111)-plane-engineered sub-5-nm Pt (Pt-NHCS) catalysts (Figure ).…”

Section: Applicationsmentioning

confidence: 99%

Polymerized and Colloidal Ionic Liquids─Syntheses and Applications

Li,

Yan,

Texter

2024

Chem. Rev.

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The breadth and importance of polymerized ionic liquids (PILs) are steadily expanding, and this review updates advances and trends in syntheses, properties, and applications over the past five to six years. We begin with an historical overview of the genesis and growth of the PIL field as a subset of materials science. The genesis of ionic liquids (ILs) over nano to meso lengthscales exhibiting 0D, 1D, 2D, and 3D topologies defines colloidal ionic liquids, CILs, which compose a subclass of PILs and provide a synthetic bridge between IL monomers (ILMs) and micro to macroscale PIL materials. The second focus of this review addresses design and syntheses of ILMs and their polymerization reactions to yield PILs and PIL-based materials. A burgeoning diversity of ILMs reflects increasing use of nonimidazolium nuclei and an expanding use of step-growth chemistries in synthesizing PIL materials. Radical chain polymerization remains a primary method of making PILs and reflects an increasing use of controlled polymerization methods.Step-growth chemistries used in creating some CILs utilize extensive cross-linking. This cross-linking is enabled by incorporating reactive functionalities in CILs and PILs, and some of these CILs and PILs may be viewed as exotic cross-linking agents. The third part of this update focuses upon some advances in key properties, including molecular weight, thermal properties, rheology, ion transport, self-healing, and stimuli-responsiveness. Glass transitions, critical solution temperatures, and liquidity are key thermal properties that tie to PIL rheology and viscoelasticity. These properties in turn modulate mechanical properties and ion transport, which are foundational in increasing applications of PILs. Cross-linking in gelation and ionogels and reversible step-growth chemistries are essential for self-healing PILs. Stimuli-responsiveness distinguishes PILs from many other classes of polymers, and it emphasizes the importance of segmentally controlling and tuning solvation in CILs and PILs. The fourth part of this review addresses development of applications, and the diverse scope of such applications supports the increasing importance of PILs in materials science. Adhesion applications are supported by ionogel properties, especially crosslinking and solvation tunable interactions with adjacent phases. Antimicrobial and antifouling applications are consequences of the cationic nature of PILs. Similarly, emulsion and dispersion applications rely on tunable solvation of functional groups and on how such groups interact with continuous phases and substrates. Catalysis is another significant application, and this is an historical tie between ILs and PILs. This component also provides a connection to diverse and porous carbon phases templated by PILs that are catalysts or serve as supports for catalysts. Devices, including sensors and actuators, also rely on solvation tuning and stimuliresponsiveness that include photo and electrochemical stimuli. We conclude our view of applications with 3D printi...

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Section: Applicationsmentioning

confidence: 99%

Polymerized and Colloidal Ionic Liquids─Syntheses and Applications

Li,

Yan,

Texter

2024

Chem. Rev.

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“…S3 (ESI †), the XRD pattern shows three characteristic peaks attributed to the (111), (200), and (220) planes of the Pt-based solid solution alloy, indicating the successful synthesis of PtPdRuIr NPs with pure phase. 25,27 In addition, the PtPdRuIr NPs obtained from different molar ratios of four metals exhibit small average particle sizes and homogeneous distributions on the HCS supports (Fig. S4-S6, ESI †), fully indicating that there is no obvious particle agglomeration of the as-prepared PtPdRuIr NPs.…”

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confidence: 93%

“…Wet-chemistry reduction methods are usually employed to develop high-index facets in Pt-groupmetal catalysts because of their low surface energy. 27,28 However, developing more effective high-activity (111) facets in Pt-group-metal alloy catalysts remains challenging.…”

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confidence: 99%

Platinum-group-metal quaternary alloys with lattice defects for enhanced oxygen electrocatalysis

Li,

Xu,

Luo

et al. 2024

Chem. Commun.

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Palladium Enhanced Iron Active Site – An Efficient Dual‐Atom Catalyst for Oxygen Electroreduction

et al. 2023

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Metal–nitrogen–carbon (M–C/N) electrocatalysts have been shown to have satisfactory catalytic activity and long‐term durability for the oxygen reduction reaction (ORR). Here, a strategy to prepare a new electrocatalyst (Fe&Pd–C/N) using a unique metal‐containing ionic liquid (IL) is exploited, in which Fe & Pd ions are positively charged species atomically dispersed by coordination to the N of the N‐doped C substrate, C/N. X‐ray absorption fine structure, XPS and aberration‐corrected transmission electron microscopy results verified a well‐defined dual‐atom configuration comprising Fe+2.x–N4 coupled Pd2+–N4 sites and well‐defined spatial distribution. Electronic control of a coupled Fe–Pd structure produces an electrocatalyst that exhibits superior performance with enhanced activity and durability for the ORR compared to that of commercial Pt/C (20%, Johnson Matthey) in both alkaline and acid media. Density functional theory calculations indicate that Pd atom can enhance the catalytic activity of the Fe active sites adjacent to Pd sites by changing the electronic orbital structure and Bader charge of the Fe centers. The excellent catalytic performance of the Fe&Pd–C/N electrocatalyst is demonstrated in zinc–air batteries and hydrogen–air fuel cells.

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Ionic Liquid-Derived Ultrafine Pt Nanoparticles with a Uniformly Dispersed State for Long-Life Oxygen Electroreduction

Cited by 6 publications

References 40 publications

Polymerized and Colloidal Ionic Liquids─Syntheses and Applications

Polymerized and Colloidal Ionic Liquids─Syntheses and Applications

Platinum-group-metal quaternary alloys with lattice defects for enhanced oxygen electrocatalysis

Palladium Enhanced Iron Active Site – An Efficient Dual‐Atom Catalyst for Oxygen Electroreduction

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