Copy the page URI to the clipboard
Crabb, E.M.; Ravikumar, M.K.; Thompsett, D.; Hurford, M.; Rose, A. and Russell, A.E.
(2004).
DOI: https://doi.org/10.1039/b401641f
URL: http://www.rsc.org/Publishing/Journals/CP/index.as...
Abstract
A series of ruthenium modified carbon supported catalysts have been prepared by surface organometallic chemistry (SOMC) with the following nominal RuPt surface ratios, (14)RuPt/C, (12)RuPt/C, (34)RuPt/C and (11)RuPt/C. The catalysts were characterised using X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), cyclic voltammetry (CV), and half-cell polarisation studies. The XRD measurements showed that a bulk PtRu alloy was not formed following SOMC modification. However, the EXAFS measurements indicated that a surface alloy is formed upon electrochemical reduction of the Ru modified catalysts. The CV studies show that the electrooxidation of CO on the Ru modified Pt/C catalysts occurs at lower potentials than on the unmodified Pt/C catalysts, but at higher potentials than on an alloyed PtRu/C with a bulk composition of 11 PtRu. Half cell polarisation measurements in 100 ppm CO in H2 show that the CO tolerance of the SOMC RuPt/C catalysts approached that of the conventional PtRu/C alloy catalyst. The results therefore indicate that a bulk alloy phase is not an essential factor in the improvement in CO tolerance of PtRu/C catalysts over that of Pt/C.
Viewing alternatives
Metrics
Public Attention
Altmetrics from AltmetricNumber of Citations
Citations from DimensionsItem Actions
Export
About
- Item ORO ID
- 6099
- Item Type
- Journal Item
- ISSN
- 1463-9076
- Keywords
- Absorption Fine-Structure; Fuel-Cell Catalysts; Pt-Ru; Organometallic Chemistry; Underpotential Deposition; Methanol Electrooxidation; Modified Pt(111); Adsorbed Co; Oxidation; Ruthenium
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Depositing User
- Astrid Peterkin