The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system
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Elsevier B.V.
2016
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my.unimap-411722016-03-21T10:37:22Z The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system Naimah, Ibrahim Mas Rahayu, Jalil Poulidi, Danai Ian S., Metcalfe naimah@unimap.edu.my ian.metcalfe@newcastle.ac.uk Cyclic voltammetry EPOC Ethylene oxidation Na species Oxygen charge transfer Pt YSZ Link to publisher's homepage at http://www.journals.elsevier.com The effect of sodium-modification on the catalyst and electrocatalytic properties of a platinum catalyst supported on a YSZ solid electrolyte was studied. Increasing the sodium coverage on the catalyst surface appears to block some of the three-phase boundary (tpb) sites and reduces the rate of the charge transfer reaction. The promotion of the platinum surface reaction (ethylene oxidation) seems to a first approximation to be a function of the rate of oxygen supply or removal to or from the surface irrespective of whether this is contaminated by sodium or not (samples with sodium contamination require a higher overpotential to achieve the same current density as a clean sample because of poisoning in the tpb). At high negative polarisations (oxygen removed from the surface) the sodium contaminated samples show a significant increase in rate, possibly due to the decomposition of e.g. sodium hydroxides and carbonates. 2016-03-21T10:37:22Z 2016-03-21T10:37:22Z 2012-10-04 Article Solid State Ionics, vol.225, 2012, pages 386-389 0167-2738 http://dspace.unimap.edu.my:80/xmlui/handle/123456789/41172 10.1016/j.ssi.2012.04.023 en Elsevier B.V. |
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Universiti Malaysia Perlis |
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UniMAP Library |
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Institutional Repository |
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Asia |
| country |
Malaysia |
| content_provider |
Universiti Malaysia Perlis |
| content_source |
UniMAP Library Digital Repository |
| url_provider |
http://dspace.unimap.edu.my/ |
| language |
English |
| topic |
Cyclic voltammetry EPOC Ethylene oxidation Na species Oxygen charge transfer Pt YSZ |
| spellingShingle |
Cyclic voltammetry EPOC Ethylene oxidation Na species Oxygen charge transfer Pt YSZ Naimah, Ibrahim Mas Rahayu, Jalil Poulidi, Danai Ian S., Metcalfe The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| description |
Link to publisher's homepage at http://www.journals.elsevier.com |
| author2 |
naimah@unimap.edu.my |
| author_facet |
naimah@unimap.edu.my Naimah, Ibrahim Mas Rahayu, Jalil Poulidi, Danai Ian S., Metcalfe |
| format |
Article |
| author |
Naimah, Ibrahim Mas Rahayu, Jalil Poulidi, Danai Ian S., Metcalfe |
| author_sort |
Naimah, Ibrahim |
| title |
The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| title_short |
The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| title_full |
The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| title_fullStr |
The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| title_full_unstemmed |
The role of low coverage sodium surface species on electrochemical promotion in a Pt/YSZ system |
| title_sort |
role of low coverage sodium surface species on electrochemical promotion in a pt/ysz system |
| publisher |
Elsevier B.V. |
| publishDate |
2016 |
| url |
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/41172 |
| _version_ |
1643799599420276736 |
| score |
13.251813 |