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Issue 6, 2016
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Adsorption and reaction of H2S on Cu(110) studied using scanning tunneling microscopy

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Abstract

Using low-temperature scanning tunneling microscopy (STM), the adsorption and reaction of hydrogen sulfide (H2S) and its fragments (SH and S) on Cu(110) are investigated at 5 K. H2S adsorbs molecularly on the surface on top of a Cu atom. With voltage pulses of STM, it is possible to induce sequential dehydrogenation of H2S to SH and S. We found two kinds of adsorption structures of SH. The short-bridge site is the most stable site for SH, while the long-bridge site is the second. Density functional theory calculations show that the S–H axis is inclined from the surface normal for both species. The reaction of H2S with OH and O was directly observed to yield SH and S, respectively, providing a molecular-level insight into catalyst poisoning.

Graphical abstract: Adsorption and reaction of H2S on Cu(110) studied using scanning tunneling microscopy

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Publication details

The article was received on 15 Dec 2015, accepted on 14 Jan 2016 and first published on 15 Jan 2016


Article type: Paper
DOI: 10.1039/C5CP07726E
Citation: Phys. Chem. Chem. Phys., 2016,18, 4541-4546
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    Adsorption and reaction of H2S on Cu(110) studied using scanning tunneling microscopy

    A. Shiotari, H. Okuyama, S. Hatta, T. Aruga and I. Hamada, Phys. Chem. Chem. Phys., 2016, 18, 4541
    DOI: 10.1039/C5CP07726E

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