ORCID Profile
0000-0001-5316-6758
Current Organisation
Dalian Institute of Chemical Physics
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Publisher: Elsevier BV
Date: 12-2014
Publisher: American Chemical Society (ACS)
Date: 14-01-2019
DOI: 10.1021/ACS.JPCLETT.8B03448
Abstract: A number of experiments have demonstrated that electrochemical reactions are feasible in confined nanoscale reactors, while what the fundamentals of confined electrochemistry are is not clear. Using first-principles calculations and electrochemical modeling, we find that the capacitance in the confined nanoscale reactors can be significantly enhanced, compared to an open electrode interface, essentially promoting the electrochemical reactions and charge transfer efficiency in nanoscale reactors. More importantly, this is a general character, as found in a variety of electrochemical and thermochemical reactions. At the end, we use the recently defined new concept of "confinement energy" for understanding the nature of confined electrochemistry from both thermochemical and electrochemical points of view.
Publisher: Springer Science and Business Media LLC
Date: 22-03-2019
DOI: 10.1038/S41467-019-08972-X
Abstract: Geometric or electronic confinement of guests inside nanoporous hosts promises to deliver unusual catalytic or opto-electronic functionality from existing materials but is challenging to obtain particularly using metastable hosts, such as metal–organic frameworks (MOFs). Reagents (e.g. precursor) may be too large for impregnation and synthesis conditions may also destroy the hosts. Here we use thermodynamic Pourbaix diagrams (favorable redox and pH conditions) to describe a general method for metal-compound guest synthesis by rationally selecting reaction agents and conditions. Specifically we demonstrate a MOF-confined RuO 2 catalyst (RuO 2 @MOF-808-P) with exceptionally high catalytic CO oxidation below 150 °C as compared to the conventionally made SiO 2 -supported RuO 2 (RuO 2 /SiO 2 ). This can be caused by weaker interactions between CO/O and the MOF-encapsulated RuO 2 surface thus avoiding adsorption-induced catalytic surface passivation. We further describe applications of the Pourbaix-enabled guest synthesis (PEGS) strategy with tutorial ex les for the general synthesis of arbitrary guests (e.g. metals, oxides, hydroxides, sulfides).
Publisher: American Chemical Society (ACS)
Date: 14-09-2020
DOI: 10.1021/JACS.0C08139
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7SC01615H
Abstract: The confinement effect of h-BN shells helps to maintain active metallic Ni cores and strengthen the HOR processes occurring at h-BN/Ni interfaces.
Publisher: American Chemical Society (ACS)
Date: 23-04-2015
DOI: 10.1021/ACS.NANOLETT.5B01205
Abstract: In heterogeneous catalysis molecule-metal interaction is often modulated through structural modifications at the surface or under the surface of the metal catalyst. Here, we suggest an alternative way toward this modulation by placing a two-dimensional (2D) cover on the metal surface. As an illustration, CO adsorption on Pt(111) surface has been studied under 2D hexagonal boron nitride (h-BN) overlayer. Dynamic imaging data from surface electron microscopy and in situ surface spectroscopic results under near ambient pressure conditions confirm that CO molecules readily intercalate monolayer h-BN sheets on Pt(111) in CO atmosphere but desorb from the h-BN/Pt(111) interface even around room temperature in ultrahigh vacuum. The interaction of CO with Pt has been strongly weakened due to the confinement effect of the h-BN cover, and consequently, CO oxidation at the h-BN/Pt(111) interface was enhanced thanks to the alleviated CO poisoning effect.
Publisher: American Chemical Society (ACS)
Date: 29-01-2021
Publisher: Proceedings of the National Academy of Sciences
Date: 22-05-2017
Abstract: Small spaces in nanoreactors may have big implications in chemistry, because the chemical nature of molecules and reactions within the nanospaces can be changed significantly due to the nanoconfinement effect. Two-dimensional (2D) nanoreactor formed under 2D materials can provide a well-defined model system to explore the confined catalysis. We demonstrate a general tendency for weakened surface adsorption under the confinement of graphene overlayer, illustrating the feasible modulation of surface reactions by placing a 2D cover on top of the surface. The developed concept “catalysis under cover” can be applied to reactions between two opposite 2D walls interacting with each other through van der Waals force, which helps to design high-performance nanocatalysts interfacing with 2D material overlayers.
No related grants have been discovered for Qiang Fu.