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- W4313397704 endingPage "123050" @default.
- W4313397704 startingPage "123050" @default.
- W4313397704 abstract "Engineering metal-based nanoarchitectures and their atomic-scale arrangement is a promising avenue for enhanced mercury adsorbent activities. Interactions between metal single atoms and substrates result in regulated transitions between distinct reaction processes that boost mercury adsorption activity. Herein, a novel sorbent of porous Co3O4 with Palladium atomic dispersed was successfully prepared by one-step pyrolysis of zeolitic imidazolate framework 67 (ZIF-67) precursors. Via engineering single Pd atoms into ZIF-derived Co3O4 (Pd1/Co3O4-ZIF), the strong metal-support interaction (SMSI) activated the reducibility of Co3+ in porous Co3O4 to efficiently adsorb and oxidize Hg0, enhancing its mercury removal efficiency. Specifically, Pd1/Co3O4-ZIF exhibited superior sorption performance for Hg0 over a broad range of temperatures (30–350 °C) and high gaseous hourly space velocity (about 555,500 hr−1) with the average Hg0 removal efficiency higher than 98%. The strategy of constructing atomic active sites on the surface of porous metal-oxide to convert adsorbed Hg0 into HgO is a promising approach to solve the problem that Hg0 in flue gas is challenging to remove. Density functional theory (DFT) calculation further proved that the existence of a single Pd site on the surface of Co3O4 significantly reduced the energy barrier of Hg0 to HgO at the atomic level. This work contributed to a thorough comprehension of the structural and adsorption properties of the ZIF-derived Co3O4 sorbent engineering with a single atom and enabled the efficient capture of elemental mercury in flue gas by such ZIF-derived sorbent." @default.
- W4313397704 created "2023-01-06" @default.
- W4313397704 creator A5006903726 @default.
- W4313397704 creator A5019829536 @default.
- W4313397704 creator A5041609878 @default.
- W4313397704 creator A5056532764 @default.
- W4313397704 creator A5085142676 @default.
- W4313397704 creator A5085740179 @default.
- W4313397704 date "2023-03-01" @default.
- W4313397704 modified "2023-09-25" @default.
- W4313397704 title "Engineering single-atom Pd sites in ZIF-derived porous Co3O4 for enhanced elementary mercury removal" @default.
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