Publications by authors named "Renjin Xiong"
diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was developed for the first time to observe the hydrogen isotope separation behavior at active Cu sites within Cu-MFU-4, and clear evidence of the preferential adsorption of D over H was directly captured. More importantly, our results show direct spectral proof to clarify the chemical affinity quantum sieving mechanism of hydrogen isotope separation within porous adsorbents.
View Article and Find Full Text PDFHighly Effective H/D Separation within the Stable Cu(I)Cu(II)-BTC: The Effect of Cu(I) Structure on Quantum Sieving.
ACS Appl Mater Interfaces
January 2023
Article Synopsis
- Deuterium separation from isotopic mixtures is tough due to similarities in size and properties, but using porous materials with the quantum sieving effect can help.
- A new material, Cu(I)Cu(II)-BTC, derived from HKUST-1, shows a remarkable D/H isotope separation selectivity of 37.9 at 30 K, outperforming other materials.
- The enhanced selectivity is due to a combination of kinetic and chemical affinity effects, with Cu(I) coordination sites playing a vital role in improving quantum sieving without needing complicated designs.
Membrane gas separation offers high energy efficiency, easy operation, and reduced environmental impacts for vast hydrocarbon recovery in the petrochemical industry. However, the recovery of real light hydrocarbon mixtures (e.g.
View Article and Find Full Text PDFSeparation and characterization of the active species in Ti-doped NaAlH4.
Chem Commun (Camb)
March 2013
The catalytic mechanism of doped complex hydrides for hydrogen storage remains unconfirmed. Here, we report a simple method to separate the active species of Ti-based catalysts in NaAlH(4) by filtration using tetrahydrofuran (THF) as solvent. The results show that the average particle size of the obtained Al-Ti active species is 30-50 nm.
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