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A comparative scanning tunnelling microscopy study of the adsorption of [RhI(CO)2Cl]2 on the (1×1) and (1×2) surfaces of TiO2[1 1 0]

A comparative scanning tunnelling microscopy study of the adsorption of [RhI(CO)2Cl]2 on the (1×1) and (1×2) surfaces of TiO2[1 1 0]
A comparative scanning tunnelling microscopy study of the adsorption of [RhI(CO)2Cl]2 on the (1×1) and (1×2) surfaces of TiO2[1 1 0]
The room temperature interaction of [Rh-I(CO)(2)Cl](2) with the (1 x 1) and Ti2O3 added row (1 x 2) terminations of TiO2[1 1 0] has been studied using scanning tunnelling microscopy. Dissociative adsorption of [Rh-I(CO)(2)Cl](2) at the (1 x 1) surface leads to the formation of an adsorbed Rh-I(CO)(2)Cl species that coexists with particulate Rh; the latter forms predominantly at step edges and terrace defects. The saturated Rh-I(CO)(2)Cl layer orders into domains showing a ((1)(-1) (2)(1)) relationship with respect to the underlying (1 x 1) structure. However, adsorption of the Rh organometallic at the Ti2O3 terminated (1 x 2) surface results solely in the formation of metallic Rh: there is no evidence for the formation of a stable Rh-I(CO)(2)Cl species. The difference in surface reactivity between the two TiO2 surfaces is discussed in terms of their differing structure. A mode of adsorption of the Rh-I(CO)(2)Cl species on the (1 x 1) surface and the resulting structure of the geminal dicarbonyl adlayer are proposed.
chemical vapor deposition, low energy electron diffraction (leed), scanning tunneling microscopy, scanning tunneling spectroscopies, catalysis, chemisorption, growth, surface chemical reaction, surface structure, morphology, roughness and topography, oxygen, titanium, rhodium, titanium oxide, low index single crystal surfaces, clusters, rhodium gem-dicarbonyl, tunneling-microscopy, tio2(110) surface, room-temperature, lewis acidity, metal-oxides, co, (2), reactivity
0039-6028
223-230
Bennett, Roger A.
5d6a24cc-72ab-492b-a60c-7d72c7880e29
Newton, Mark A.
73aab2af-4641-47f3-89ad-3b7d3026164f
Smith, Rupert D.
760e8f52-5c0e-4142-8f2c-706230c2f4bc
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565
Evans, John
05890433-0155-49fe-a65d-38c90ea25c69
Bennett, Roger A.
5d6a24cc-72ab-492b-a60c-7d72c7880e29
Newton, Mark A.
73aab2af-4641-47f3-89ad-3b7d3026164f
Smith, Rupert D.
760e8f52-5c0e-4142-8f2c-706230c2f4bc
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565
Evans, John
05890433-0155-49fe-a65d-38c90ea25c69

Bennett, Roger A., Newton, Mark A., Smith, Rupert D., Bowker, Michael and Evans, John (2001) A comparative scanning tunnelling microscopy study of the adsorption of [RhI(CO)2Cl]2 on the (1×1) and (1×2) surfaces of TiO2[1 1 0]. Surface Science, 487 (1-3), 223-230. (doi:10.1016/S0039-6028(01)01101-3).

Record type: Article

Abstract

The room temperature interaction of [Rh-I(CO)(2)Cl](2) with the (1 x 1) and Ti2O3 added row (1 x 2) terminations of TiO2[1 1 0] has been studied using scanning tunnelling microscopy. Dissociative adsorption of [Rh-I(CO)(2)Cl](2) at the (1 x 1) surface leads to the formation of an adsorbed Rh-I(CO)(2)Cl species that coexists with particulate Rh; the latter forms predominantly at step edges and terrace defects. The saturated Rh-I(CO)(2)Cl layer orders into domains showing a ((1)(-1) (2)(1)) relationship with respect to the underlying (1 x 1) structure. However, adsorption of the Rh organometallic at the Ti2O3 terminated (1 x 2) surface results solely in the formation of metallic Rh: there is no evidence for the formation of a stable Rh-I(CO)(2)Cl species. The difference in surface reactivity between the two TiO2 surfaces is discussed in terms of their differing structure. A mode of adsorption of the Rh-I(CO)(2)Cl species on the (1 x 1) surface and the resulting structure of the geminal dicarbonyl adlayer are proposed.

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More information

Published date: 20 July 2001
Keywords: chemical vapor deposition, low energy electron diffraction (leed), scanning tunneling microscopy, scanning tunneling spectroscopies, catalysis, chemisorption, growth, surface chemical reaction, surface structure, morphology, roughness and topography, oxygen, titanium, rhodium, titanium oxide, low index single crystal surfaces, clusters, rhodium gem-dicarbonyl, tunneling-microscopy, tio2(110) surface, room-temperature, lewis acidity, metal-oxides, co, (2), reactivity

Identifiers

Local EPrints ID: 19404
URI: http://eprints.soton.ac.uk/id/eprint/19404
ISSN: 0039-6028
PURE UUID: cbc7cb8c-37e1-4b2b-8365-c18c4b8822cc

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Date deposited: 14 Feb 2006
Last modified: 15 Jul 2019 19:27

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