Ammonia Selective Oxidation on Pt(100) Sites in an Alkaline Medium
- 9 June 2005
- journal article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 109 (26), 12914-12919
- https://doi.org/10.1021/jp051269d
Abstract
The oxidation of ammonia on platinum surfaces is a structure sensitive reaction that takes place almost exclusively on Pt(100) sites. This report shows how dependent the activity is on different arrangements of (100) sites of platinum. The effect of two-dimensional domains has been addressed by using stepped surfaces having terraces with (100) geometry, either with (111) and (110) steps. The results were compared with those obtained from stepped surfaces having terraces with (111) or (110) symmetry and monatomic (100) steps, thus representing monodimensional (100) domains. The observed behavior confirms the extreme sensitivity of the reaction to the different arrangement of this type of square sites.Keywords
This publication has 11 references indexed in Scilit:
- Shape-dependent electrocatalysis: ammonia oxidation on platinum nanoparticles with preferential (100) surfacesElectrochemistry Communications, 2004
- In Situ Surface Characterization of Preferentially Oriented Platinum Nanoparticles by Using Electrochemical Structure Sensitive Adsorption ReactionsThe Journal of Physical Chemistry B, 2004
- Selective electrocatalysis of ammonia oxidation on Pt(100) sites in alkaline mediumElectrochemistry Communications, 2003
- The role of adsorbates in the electrochemical oxidation of ammonia on noble and transition metal electrodesJournal of Electroanalytical Chemistry, 2001
- DEMS-cyclic voltammetry investigation of the electrochemistry of nitrogen compounds in 0.5 M potassium hydroxideElectrochimica Acta, 1994
- Electrochemical behaviour of Pt(100) in various acidic mediaJournal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1991
- Oxidation of some reactive small molecules on copper and platinum in solutions of high pHElectrochimica Acta, 1991
- Electrochemical adsorption behaviour of platinum stepped surfaces in sulphuric acid solutionsJournal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1986
- Untersuchungen zur anodischen oxidation des hydrazins im alkalischen elektrolyten—I. Der reaktionsmechanismus an platinelektrodenElectrochimica Acta, 1973
- Untersuchungen Zur anodischen Oxidation von Ammoniak an Platin-ElektrodenJournal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1970