Single Ni sites distributed on N-doped carbon for selective hydrogenation of acetylene

Dai, Xinyao; Chen, Zheng; Yao, Takeshi; Zheng, Lirong; Lin, Yue; Liu, Wei; Ju, Huanxin; Zhu, Junfa; Hong, Xun; Wei, Shiqiang; Wu, Yuen; Li, Yadong

doi:10.1039/c7cc04820c

Cited by 93 publications

(70 citation statements)

References 37 publications

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“…Ni SAC have also been investigated on N‐doped carbon . A Ni SAC showed a conversion of acetylene and a selectivity for ethylene both over 90 %, whereas the selectivity shown by Ni nanoparticles on N‐doped carbon was less than 55 % at all tested temperatures . The excellent selectivity of the Ni SAC for ethylene may have been due to the uniform coordination of N atoms around the Ni centres, allowing to modify the electronic density on the Ni atoms.…”

Section: Catalysis With Single Atom Catalysts On Carbon‐based Materialsmentioning

confidence: 95%

Single Atom Catalysts on Carbon‐Based Materials

2018

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Metal particle size is an important parameter to consider when looking at supported catalyst performances. As for other properties, surface reactivity of metallic nanoparticles is thus highly size‐dependent. The smallest size that can be reached for this type of object is of course the isolated atom deposited on a support. The preparation of single‐atom catalysts (SAC) is not trivial, since to avoid clustering, the mean adsorption energy of the metal on the support should be higher than its cohesive energy. The choice of a support that allows a strongly interacting environment with the metal is therefore a key step in the preparation of such catalysts. The spectrum of carbon (nano)materials is very broad, and their structure as well as their surface chemistry, although sometime complex, can be tuned and exploited for the stabilization of SAC. This Review summarizes in a comprehensive manner experimental and computational studies aiming at: i) preparing SAC on carbon materials, ii) understanding the metal‐support interactions in SAC, and iii) studying how this relates to catalytic performances. The use of SAC follows well the needs dictated by society (energy and environment issues), and many studies have already been published in various fields, such as thermal catalysis, photocatalysis and electrocatalysis.

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Section: Catalysis With Single Atom Catalysts On Carbon‐based Materialsmentioning

confidence: 95%

Single Atom Catalysts on Carbon‐Based Materials

2018

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“…Unlike Co 2+ ions, some other kinds of metal ions cannot directly form pure ZIFs with the imidazolate linker; however, they can also partly replace the zinc and gain predesigned bimetallic ZIF precursors for SACs. Through pyrolysis of NiZn ZIFs, a composite of single Ni atoms supported on N‐doped carbon (Ni SAs/NC) was successfully synthesized by Li's group, where the aggregation of Ni atoms was strictly limited by the carbon frameworks . In another example, Zhang et al exploited a chemical doping approach to fabricate Fe‐doped ZIF precursors ( Figure a) .…”

Section: Synthetic Methods Of Mof‐derived Carbon‐supported Sacsmentioning

confidence: 99%

“…Further DFT calculations revealed that H 2 preferred the N site while C 2 H 2 preferred the Pd site in the Pd‐SAC with Pd‐N 4 structure, resulting in smaller coadsorption energy of C 2 H 2 and H 2 on Pd 1 ‐N 4 and thus increasing molecular collision possibility. In another literature, nonprecious metal SACs, obtained from direct pyrolysis of bimetallic ZnNi‐ZIF, exhibited over 90% conversion of acetylene and selectivity for ethylene even at a high temperature of 200 °C, providing an effective alternative to the Pd‐based catalysts …”

Section: Applications Of Mof‐derived Carbon‐supported Sacsmentioning

confidence: 99%

Recent Advances for MOF‐Derived Carbon‐Supported Single‐Atom Catalysts

et al. 2019

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Single‐atom catalysts have drawn considerable attention because of their unique catalytic properties. However, the high surface energy of single atoms restricts their fabrication and creates significant challenges for further developments. In order to overcome this problem, metal organic framework (MOF)‐derived carbon materials can be served as ideal supports to anchor atomically dispersed metal atoms, due to their tunable particle size and shape features, by providing high surface area, porosity, thermal, and chemical stability. This review highlights the recent advances in i) different types of construction strategies for MOF‐derived carbon‐supported single‐atom catalysts, and ii) the catalytic applications of these MOF‐derived carbon‐supported single‐atom catalysts. Further, this review offers a valuable insight into the current challenges and future opportunities for MOF‐derived carbon‐supported single‐atom catalysts.

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“…Some references focusing on MOF-derived single-atom catalysts for other applications,s uch as organic synthesis,o r single-atom catalysts that were not derived from MOFs are also recommended to provide awider overview of the field of single-atom catalysts. [47,50,[127][128][129][130][131][132]…”

Section: Angewandte Chemiementioning

confidence: 99%

Atomically Dispersed Metal Sites in MOF‐Based Materials for Electrocatalytic and Photocatalytic Energy Conversion

et al. 2018

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Metal sites play an essential role in both electrocatalytic and photocatalytic energy conversion. The highly ordered arrangements of the organic linkers and metal nodes as well as the well-defined pore structures of metal-organic frameworks (MOFs) make them ideal substrates to support atomically dispersed metal sites (ADMSs) located in their metal nodes, linkers, and pores. Porous carbon materials doped with ADMSs can be derived from these ADMS-incorporating MOF precursors through controlled treatments. These ADMSs incorporated in pristine MOFs and MOF-derived carbon materials possess unique advantages over molecular or bulk metal-based catalysts and bridge the gap between homogeneous and heterogeneous catalysts for energy-conversion applications. This Review presents recent progress in the design and incorporation of ADMSs in MOFs and MOF-derived materials for energy-conversion applications.

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Single Ni sites distributed on N-doped carbon for selective hydrogenation of acetylene

Cited by 93 publications

References 37 publications

Single Atom Catalysts on Carbon‐Based Materials

Single Atom Catalysts on Carbon‐Based Materials

Recent Advances for MOF‐Derived Carbon‐Supported Single‐Atom Catalysts

Atomically Dispersed Metal Sites in MOF‐Based Materials for Electrocatalytic and Photocatalytic Energy Conversion

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