Mechanistic understanding of Cu-based bimetallic catalysts

Han, You; Wang, Yulian; Ma, Tengzhou; Li, Wei; Zhang, Jinli; Zhang, Minhua

doi:10.1007/s11705-019-1902-4

Cited by 30 publications

(9 citation statements)

References 290 publications

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“…Cu is one of the nonprecious metals with a relatively abundant content . Up to now, many copper-based catalysts have shown great reactivity in many reactions. − What’s more, its single-atom catalyst is also widely used. − For instance, an asymmetric coordination CuN 2 C 2 structure constructed by Yin et al was proved highly active and satisfyingly selective in aprotic lithium-oxygen batteries through experimental and DFT calculations . Hu et al prepared an atomically dispersed Cu catalyst after pyrolysis treatment and achieved the effects of converting NO 3 into NH 3 with high selectivity and efficiently removing the nitrate in water .…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Heteroatoms Anchoring a Cu Single-Atom Catalyst on Acetylene Hydrochlorination

et al. 2022

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A Cu-based catalyst has the advantages of low price and high reserves as well as catalytic activity in acetylene hydrochlorination. In order to better design and prepare efficient Cu single-atom catalysts (SACs) for acetylene hydrochlorination, a single Cu atom anchored by different heteroatoms was investigated by constructing the CuX4 (X = B, C, N, O, P) structure using the spin-polarized density functional theory (DFT). According to the results, the N-doped substrate significantly increased the charge of the Cu atom, and B- and P-doped substrates provided multiple active sites, while the O-doped substrate could not stably anchor the single Cu atom. In general, different catalysts had different dominant mechanisms, and it was found that the charge transfer between single metal atoms and substrates could be used as a descriptor of the catalytic performance. This work reveals the effect mechanisms of the local coordination environment for Cu SACs catalyzing acetylene hydrochlorination, as well as provides theoretical insights for the rational design of efficient Cu-based catalysts.

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Section: Introductionmentioning

confidence: 99%

Effect of Different Heteroatoms Anchoring a Cu Single-Atom Catalyst on Acetylene Hydrochlorination

et al. 2022

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“…Among a wide variety of available nonmercuric catalysts, Hutchings and other researchers have found that many metal catalysts, such as Au, [8][9][10] Pd, [11,12] Ru, [13][14][15][16] Cu, [17] and so on, all showed high catalytic activities and could be used as substitutes for HgCl 2 in acetylene hydrochlorination. To meet economic benefits, Cu-based catalysts are definitely becoming a research hotspot, [18] and researchers have been pursuing and aiming to improve the catalytic activity and stability. The largest problem of Cu catalysts is that they are easily deactivated due to the aggregation of active components and the reduction of high valent state of copper.…”

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confidence: 99%

Pyrrolidone ligand improved Cu‐based catalysts with high performance for acetylene hydrochlorination

Han

Wang

et al. 2020

Applied Organom Chemis

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A series of Cu-pyrrolidone/spherical activated carbon (SAC) catalysts were prepared via a simple incipient wetness impregnation method and then assessed in acetylene hydrochlorination, and the catalytic evaluation result indicated that the 1-methyl-2-pyrrolidinone (NMP) ligand was found to be the most effective one to significantly improve the activity and stability of Cu catalyst. The catalyst with the optimal molar ratio of NMP/Cu = 0.25 showed 94.2% acetylene conversion at 180 C and an acetylene gas hourly space velocity of 180 h −1. Moreover, the acetylene conversion of Cu-0.25NMP/SAC remained stable over 99.1% for about 220 h under the industrial condition. Transmission electron microscopy (TEM) analyses proved that NMP ligand improved the dispersion of Cu species. In addition, hydrogen temperature-programmed reduction (H 2-TPR), X-ray photoelectron spectra (XPS), thermogravimetric analysis (TGA), and Brunner-Emmet-Teller (BET) indicated that the additive of NMP was preferential to stabilize the catalytic active Cu + and Cu 2+ species and inhibit the reduction of Cu α+ to Cu 0 during the preparation process and reaction, hence restraining the coke deposition. Furthermore, the steady coordination structure between Cu and NMP was confirmed by Fourier-transform infrared spectra (FT-IR) and Raman combining with density functional theory (DFT) calculation, which could effectively lower the adsorption energy of catalyst for C 2 H 2 and inhibit the serious carbon deposition caused by excessive acetylene self-accumulation. Our findings suggest that the efficient, well-stabilized cost-effective, and environmentally friendly Cu catalyst has great potential in acetylene hydrochlorination.

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“…We expect the Cu x O/TiO 2 material to be applied to various antiviral industrial items in indoor circumstances, such as hospitals, airports, metro stations, and schools, as coating materials for air filters, respiratory face masks, and antifungal fabrics to prevent the COVID-19 spread. Furthermore, the present concept contributes to the design of various antiviral materials, such as bimetallic catalysts [88][89][90].…”

Section: Discussionmentioning

confidence: 98%

Antiviral Effect of Visible Light-Sensitive CuxO/TiO2 Photocatalyst

Miyauchi

Sunada²,

Hashimoto

2020

Catalysts

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Photocatalysis is an effective technology for preventing the spread of pandemic-scale viruses. This review paper presents an overview of the recent progress in the development of an efficient visible light-sensitive photocatalyst, i.e., a copper oxide nanoclusters grafted titanium dioxide (CuxO/TiO2). The antiviral CuxO/TiO2 photocatalyst is functionalised by a different mechanism in addition to the photocatalytic oxidation process. The CuxO nanocluster consists of the valence states of Cu(I) and Cu(II); herein, the Cu(I) species denaturalizes the protein of the virus, thereby resulting in significant antiviral properties even under dark conditions. Moreover, the Cu(II) species in the CuxO nanocluster serves as an electron acceptor through photo-induced interfacial charge transfer, which leads to the formation of an anti-virus Cu(I) species and holes with strong oxidation power in the valence band of TiO2 under visible-light irradiation. The antiviral function of the CuxO/TiO2 photocatalyst is maintained under indoor conditions, where light illumination is enabled during the day but not during the night; this is because the remaining active Cu(I) species works under dark conditions. The CuxO/TiO2 photocatalyst can thus be used to reduce the risk of virus infection by acting as an antiviral coating material.

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Mechanistic understanding of Cu-based bimetallic catalysts

Cited by 30 publications

References 290 publications

Effect of Different Heteroatoms Anchoring a Cu Single-Atom Catalyst on Acetylene Hydrochlorination

Effect of Different Heteroatoms Anchoring a Cu Single-Atom Catalyst on Acetylene Hydrochlorination

Pyrrolidone ligand improved Cu‐based catalysts with high performance for acetylene hydrochlorination

Antiviral Effect of Visible Light-Sensitive CuxO/TiO2 Photocatalyst

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