Incorporation of Cu(<scp>ii</scp>) and its selective reduction to Cu(<scp>i</scp>) within confined spaces: efficient active sites for CO adsorption

Li, Yuxia; Li, Shuaishuai; Xue, Ding-Ming; Liu, Xiaoqin; Jin, Mengmeng; Sun, Lin‐Bing

doi:10.1039/c8ta01805g

Cited by 48 publications

(45 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The captured CO in [EimH][OAc]–0.6CuOAc had the large red shift higher than free CO with the vibrational frequency of 2143 cm −1 and [EimH][OAc]–0.6CuOAc would have a strong chemical interaction for CO capture, making a good agreement with the previous literature reported by Wu et al 13 Therefore, it is demonstrated that the Cu + sites of [Cu(OAc) 2 ] − in ILs absorbents can preferentially capture CO through π‐complexation interaction. This π‐complexation interaction has also been employed for the capture of CO by various Cu + ‐containing solid adsorbents 31,32 …”

Section: Resultsmentioning

confidence: 99%

“…for the capture of CO by various Cu + -containing solid adsorbents. 31,32 To further disclose the interaction of the anion [Cu(OAc…”

Section: Co Absorption Mechanismmentioning

confidence: 99%

“…ILs, ionic liquids ratio of CO and N 2 on various ILs and adsorbent materials at 1 bar was further compared, and the results are presented in Figure 3. It is demonstrated that the CO/N 2 absorption amount ratio for [EimH][OAc]-0.6CuOAc reached a record value of 967 at 293.15 K and 1 bar, which is much higher than many ILs[12][13][14]20,27 and most porous MOFs adsorbent materials [29][30][31][32]. The ultralow N 2 capacity plus superior CO uptake in [EimH][OAc]-0.6CuOAc contributes to the highest CO/N 2 ideal separation selectivity.…”

mentioning

confidence: 98%

See 2 more Smart Citations

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Tao

Gao

et al. 2022

AIChE Journal

View full text Add to dashboard Cite

Three cuprous-based composite ionic liquids (ILs) [EimH][OAc]-xCuOAc (x = 0.5, 0.6, 0.7) were prepared and employed for efficient absorption of CO. It is shown that the cuprous composite IL [EimH][OAc]-0.6CuOAc exhibited the largest absorption capacity for CO (0.031 g/g at 293.15 K and 1 bar) and had a record CO/N 2 selectivity of 967, which is better than most of common ILs and solvents reported in the literature. The results of Fourier transform infrared (FTIR) spectra, electrospray ionization mass spectrometry (ESI-MS) analysis, and theoretical calculations reveal that such superior CO capacity mainly resulted from two kinds of chemical interaction between CO and the active anionic species [Cu(OAc) 2 ] À in [EimH][OAc]-0.6CuOAc. Furthermore, a "deactivated IL model" was further proposed to accurately describe the absorption behavior of CO in [EimH][OAc]-0.6CuOAc, in which the thermodynamic parameters including Henry's law constants, reaction equilibrium constants, and absorption enthalpies were estimated by the correlation of the experimental solubilities of CO.

show abstract

Section: Resultsmentioning

confidence: 99%

“…for the capture of CO by various Cu + -containing solid adsorbents. 31,32 To further disclose the interaction of the anion [Cu(OAc…”

Section: Co Absorption Mechanismmentioning

confidence: 99%

mentioning

confidence: 98%

See 1 more Smart Citation

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Tao

Gao

et al. 2022

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…x AgM-DS was prepared by a promising DS method with some refinements. , First, 0.1 g of MIL-101 was dispersed in 20 mL of hydrophobic n -hexane to generate a suspension followed by sonicating for 15 min and stirring for 2 h. Then, 140 μL of AgNO 3 solution was added with a uniform speed in 15 min under vigorous stirring. The suspension was additionally stirred for 2 h, filtrated, and evacuated at 40 °C until dry.…”

Section: Methodsmentioning

confidence: 99%

Confinement of Ag(I) Sites within MIL-101 for Robust Ethylene/Ethane Separation

Zhang

et al. 2019

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Effective utilization of Ag(I) π-complexation adsorbents for practical C 2 H 4 /C 2 H 6 separation urges both good separating performances and high stabilities. In this work, we incorporated AgNO 3 onto a typical metal− organic framework (MOF) of MIL-101 to obtain efficient Ag(I) πcomplexation adsorbents. It was found that the separation performances were highly dependent on the location of the AgNO 3 , which could be at the interior or the exterior of nanoporous MIL-101. Confining AgNO 3 inside the nanopores of MIL-101 was achieved through employing a double-solvent approach. The resulting AgM-DS adsorbents exhibited superior performances compared with not only pristine MIL-101 but also other modified samples with AgNO 3 at the exterior of MIL-101. To be specific, the optimal 1.6AgM-DS adsorbent secured good C 2 H 4 /C 2 H 6 separation, which is C 2 H 4 uptake (75.5 cm 3 •g −1 ) and C 2 H 4 /C 2 H 6 selectivity (9.5) at 100 kPa. For comparison, the C 2 H 4 uptakes for MIL-101, 1.6AgM-WI, and 1.6AgM-SG were merely 48.1, 56.0, and 19.4 cm 3 •g −1 , and the corresponding IAST selectivity was only 1.1, 8.1, and 1.8, respectively. It was further indicated that the 1.6AgM-DS adsorbent maintained good stability for 3 weeks, alleviating the light sensitivity of AgNO 3 . This work opens an avenue for constructing stable Ag(I) sites on MOFs to develop π-complexation adsorbents.

show abstract

“…A similar method was used to obtain CoMg-LDO(N) and CoMg-LDO, although an appropriate amount of Mg(NO3)2•6H2O was added [19]. CoMg-LDO(N) and CoMg-LDO were prepared to obtain a type of contrast material with larger area [20,21]. A transition metal with multiple valence states exhibits better catalytic abilities, while the Mg element is considered to be inactive.…”

Section: Synthesis Proceduresmentioning

confidence: 99%

Exploration of the active phase of the hydrotalcite-derived cobalt catalyst for HCHO oxidation

Lin

Yang

et al. 2019

Chinese Journal of Catalysis

View full text Add to dashboard Cite

Incorporation of Cu(ii) and its selective reduction to Cu(i) within confined spaces: efficient active sites for CO adsorption

Abstract: A two-step double-solvent strategy was first used to incorporate Cu(i) sites into MIL-101(Cr), which obviously improves the CO adsorption performance.

Cited by 48 publications

References 63 publications

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Confinement of Ag(I) Sites within MIL-101 for Robust Ethylene/Ethane Separation

Exploration of the active phase of the hydrotalcite-derived cobalt catalyst for HCHO oxidation

Contact Info

Product

Resources

About