Publication

Nitrogen adsorption on a supported iron nanocluster

Alfredo Pasquarello
2004
Journal Articles

Abstract

Sequential adsorption of N atoms on a MgO(100) supported Fe-7 cluster is studied using a density functional approach. For the number of adsorbates varying between one and six, the most favorable adsorption geometries are determined and the corresponding potential energy diagram is given. Up to five N atoms are found to bind strongly to the oxide supported cluster, with binding energies ranging from 0.98 to 1.11 eV per N atom. When a sixth N atom is added to the Fe-7/MgO(100) cluster with five preadsorbed N atoms, the potential energy sharply increases due to the strong repulsive interaction between N adsorbates at short distances. The MgO(100) support plays an important role in increasing the binding energy of the adsorbed species.

Official source

https://infoscience.epfl.ch/entities/publication/e3d21c18-0bd1-497c-976b-9bfe19d3d4c8

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Alfredo Pasquarello
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e3d21c18-0bd1-497c-976b-9bfe19d3d4c8

About this result

Related concepts (32)

Adsorption

Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent). Adsorption is a surface phenomenon and the adsorbate does not penetrate through the surface and into the bulk of the adsorbent, while absorption involves transfer of the absorbate into the volume of the material, although adsorption does often precede absorption.

Strong interaction

In nuclear physics and particle physics, the strong interaction, which is also often called the strong force or strong nuclear force, is a fundamental interaction that confines quarks into proton, neutron, and other hadron particles. The strong interaction also binds neutrons and protons to create atomic nuclei, where it is called the nuclear force. Most of the mass of a common proton or neutron is the result of the strong interaction energy; the individual quarks provide only about 1% of the mass of a proton.

Langmuir adsorption model

The Langmuir adsorption model explains adsorption by assuming an adsorbate behaves as an ideal gas at isothermal conditions. According to the model, adsorption and desorption are reversible processes. This model even explains the effect of pressure i.e. at these conditions the adsorbate's partial pressure, , is related to the volume of it, V, adsorbed onto a solid adsorbent. The adsorbent, as indicated in the figure, is assumed to be an ideal solid surface composed of a series of distinct sites capable of binding the adsorbate.

Related publications (5)

Nitrogen adsorption on a supported iron nanocluster

Chat with Graph Search

Supported nanoclusters: Preadsorbates tuning catalytic activity

Adsorption de polycarboxylates et de lignosulfonates sur poudre modèle et ciments

Binding-Energies and Cluster Formation at Low Metal-Deposition - Ag on Si and Sio2