Architectural Designs and Synthetic Strategies of Advanced Nanocatalysts

Zhan, Guowu; Li, Ping; Zeng, Hua Chun

doi:10.1002/adma.201802094

Cited by 44 publications

(40 citation statements)

References 67 publications

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“…In addition, this Ru/CoFe-LDHs interactions can be regarded as the synergistic effect between the active Ru catalytic site and the CoFe-LDHs support. The support effect has been observed in many reports for thermal catalysts 60–63 , and is believed to be helpful for catalyts to achieve remarkable activity, stability, and selectivity 64,65 . It is noteworthy that the Ru local structure does reconstruture when the electrode potential goes back to OCV (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 89%

Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides

et al. 2019

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Single atom catalyst, which contains isolated metal atoms singly dispersed on supports, has great potential for achieving high activity and selectivity in hetero-catalysis and electrocatalysis. However, the activity and stability of single atoms and their interaction with support still remains a mystery. Here we show a stable single atomic ruthenium catalyst anchoring on the surface of cobalt iron layered double hydroxides, which possesses a strong electronic coupling between ruthenium and layered double hydroxides. With 0.45 wt.% ruthenium loading, the catalyst exhibits outstanding activity with overpotential 198 mV at the current density of 10 mA cm −2 and a small Tafel slope of 39 mV dec −1 for oxygen evolution reaction. By using operando X-ray absorption spectroscopy, it is disclosed that the isolated single atom ruthenium was kept under the oxidation states of 4+ even at high overpotential due to synergetic electron coupling, which endow exceptional electrocatalytic activity and stability simultaneously.

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Section: Resultsmentioning

confidence: 89%

Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides

et al. 2019

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“…The integration of catalytic NPs to support systems possesses numerous benefits, such as enhanced stability and synergistic effects, which have also been observed with MOFs as the support materials . However, in order to fully exploit the advantages of the composite systems, dimensional control over MOF structures is crucial as well.…”

Section: Mofs As Supportsmentioning

confidence: 99%

Low‐Dimensional Metal‐Organic Frameworks and their Diverse Functional Roles in Catalysis

Tan

Zeng

2019

ChemCatChem

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In recent years, metal‐organic frameworks (MOFs) have gained tremendous attention as an emerging class of functional materials for the field of heterogeneous catalysis. In particular, low‐dimensionality of these material‐platforms can be singled out as an important structural parameter that endows unique or new functionalities and thus enables improved catalytic performance. Herein, firstly, this Review summarizes important development of the synthetic preparation strategies of low‐dimensional MOFs and their related composites. Next, effects of dimensionality on different catalytic roles of MOF platforms are highlighted and discussed. For instance, MOFs have been employed directly as heterogeneous catalysts, in which catalytic reactions take place within their pristine or deliberately created pores. Exploiting on the ordered pore structures, MOFs have also been integrated into reactor‐like catalysts to act as a membrane for selective catalysis. MOFs have also demonstrated to be unique support materials for other catalyst components, of which enhancement in stability and catalytic performance have been addressed. Lastly, MOFs have also been extensively utilized as a sacrificial template to derive highly porous and catalytic active nanomaterials. On the basis of our personal perspectives, some future research directions are suggested in this review in order to further advance this class of emerging catalysts.

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“…These nanocatalysts have remarkably promoted the chemical production, energy conversion, and environmental remediation . However, the high surface energy of the nanocatalysts which generally result to the irreversible reunite of the catalytic activity sites during the catalytic reactions procedure and finally obtain a bad respond from the catalytic system, namely, the dramatic loss of the catalysts’ original catalytic activity . A plenty of endeavors have been conducted to fabricate stable and efficient nanocatalysts by regulating the structures.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25] However, the high surface energy of the nanocatalysts which generally result to the irreversible reunite of the catalytic activity sites during the catalytic reactions procedure and finally obtain a bad respond from the catalytic system, namely, the dramatic loss of the catalysts' original catalytic activity. [26][27][28][29] A plenty of endeavors have been conducted to fabricate stable and efficient nanocatalysts by regulating the structures. With the careful design and synthesis, the nanomaterials could possess many outstanding properties, such as considerable specific surface areas, chiseled active sites and controllable mass transfer rates, which were all contributions to improve the catalysts' catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

In‐situ Construction of Graphite‐Supported Magnetic Carbocatalysts from a Metallo‐Supramolecular Polymer: High Performance for Catalytic Transfer Hydrogenation

Liu

et al. 2020

ChemNanoMat

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Developing efficient, sustainable, and stable nanocatalysts continue being the struggling goal both for academia and for industrial. Carbocatalysts have attracted great attention due to high mass transfer ability, environmental sustainability and stability. Fabricating well‐defined carbonaceous nanocatalysts for heterogeneous catalysis is intensively pursuing. In this work, a newly developed economic and facile method was applied for the large‐scale fabrication of graphite sheet encapsulated magnetic carbocatalysts. The carbocatalysts was constructed via in‐situ pyrolysis of melamine‐metallo‐supramolecular polymer precursors (MMSP) under vacuum condition. The framework of MMSP was synthesized through the condensation reaction. As a proof‐of‐concept, this method was successfully applied for the fabrication of three kinds of graphite encapsulated magnetic carbocatalysts. Based on systematically optimization, the Pt−NiO‐1000@NC‐650 nanocatalyst demonstrated highly efficient and remarkable stability for the catalytic transfer hydrogenation of 4‐nitrophenol to produce corresponding 4‐aminophenol. The kinetics study of this catalytic system illustrates the reaction order is 1st for Pt−NiO‐1000@NC‐650. Furthermore, the kinetic constant (Kapp) is 1.57 min−1 and the turnover frequency (TOF) is up to 4, 268 h−1.

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Architectural Designs and Synthetic Strategies of Advanced Nanocatalysts

Cited by 44 publications

References 67 publications

Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides

Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides

Low‐Dimensional Metal‐Organic Frameworks and their Diverse Functional Roles in Catalysis

In‐situ Construction of Graphite‐Supported Magnetic Carbocatalysts from a Metallo‐Supramolecular Polymer: High Performance for Catalytic Transfer Hydrogenation

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