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Adsorbate-Induced Restructuring of the Fe(100) Surface: Model Cluster Studies

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Arabczyk W., Rausche E., Storbeck F.

Acta Physica Polonica A

1992

vol. 81

issue 1

109-115

The Extended Hückel Theory (EHT) has been used to calculate the energy of iron clusters, Fe_{13}, modelling an Fe(100) surface, as well as the energy of iron clusters with oxygen, Fe_{13}-O, nitrogen, Fe_{13}-N, or carbon atom, Fe_{13}-C, adsorbed on a reconstructed/non-reconstructed surface. In order to determine the relative positions of iron atoms and of the adsorbed atom a sphere model was employed assuming displacement of only one iron atom.

A study of iron catalyst for ammonia synthesis by electron spectroscopy methods

100%

Arabczyk W., Moszyński D., Dłużewska M.

2010

vol. 65

55-67

A concise review of former studies into iron catalyst using electron spectroscopy methods is presented. A model of iron catalyst's surface, the so-called double layer model is presented. On the basis of this model both a method of determining surface content of a real iron catalyst and a method of determining the rate of potassium surface diffusion were developed. A double layer model was used to interpret thermal stability loss of potassium atoms on iron surface subjected to sulphur compounds' exposure.

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1 Acta Physica Polonica A

1 Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

1 2010

1 1992

2 Arabczyk W.

1 Dłużewska M.

1 Moszyński D.

1 Rausche E.

1 Storbeck F.

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Adsorbate-Induced Restructuring of the Fe(100) Surface: Model Cluster Studies

A study of iron catalyst for ammonia synthesis by electron spectroscopy methods