Cover Image

The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation

Link to publisher's homepage at http://www.elsevier.com/

Saved in:
Bibliographic Details
Main Authors: Naimah, Ibrahim, Poulidi, Danai, Metcalfe, Ian S.
Format: Article
Language:English
Published: Elsevier Inc. 2013
Subjects:
EPOC
Ethylene oxidation
Platinum
Sodium promotion
Surface impurities
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/27439
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.unimap-27439
record_format dspace
spelling my.unimap-274392013-08-13T09:20:50Z The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation Naimah, Ibrahim Poulidi, Danai Metcalfe, Ian S. EPOC Ethylene oxidation Platinum Sodium promotion Surface impurities Link to publisher's homepage at http://www.elsevier.com/ The role of sodium addition as foreign (impurity) species on the electrochemical promotion of ethylene oxidation in a Pt/YSZ system was investigated. It was found that the presence of sodium surface species on the catalyst surface can significantly affect its catalytic and electrocatalytic properties, but there is no clear evidence at this stage that such species are necessary for the observation of EPOC. Under negative polarisation, low coverage sodium was found to have a pronounced effect on the electrochemical promotion of ethylene oxidation as an electronic promoter. The reaction changed behaviour from electrophilic at low sodium coverage (0.11%) and low to intermediate oxygen partial pressure (pO2 ≤ 3.0 kPa) to electrophobic at high sodium coverage (65%) and under high oxygen partial pressures (pO2 = 8.0 kPa). In between the two sets of conditions, the reaction showed volcano-type behaviour depending on the coverage of sodium and gas-phase oxygen partial pressure. 2013-08-13T09:20:50Z 2013-08-13T09:20:50Z 2013-07 Article Journal of Catalysis, vol. 303, 2013, pages 100-109 0021-9517 http://www.sciencedirect.com/science/article/pii/S0021951713001000 http://hdl.handle.net/123456789/27439 en Elsevier Inc.
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic EPOC
Ethylene oxidation
Platinum
Sodium promotion
Surface impurities
spellingShingle EPOC
Ethylene oxidation
Platinum
Sodium promotion
Surface impurities
Naimah, Ibrahim
Poulidi, Danai
Metcalfe, Ian S.
The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
description Link to publisher's homepage at http://www.elsevier.com/
format Article
author Naimah, Ibrahim
Poulidi, Danai
Metcalfe, Ian S.
author_facet Naimah, Ibrahim
Poulidi, Danai
Metcalfe, Ian S.
author_sort Naimah, Ibrahim
title The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
title_short The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
title_full The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
title_fullStr The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
title_full_unstemmed The role of sodium surface species on electrochemical promotion of catalysis in a Pt/YSZ system: The case of ethylene oxidation
title_sort role of sodium surface species on electrochemical promotion of catalysis in a pt/ysz system: the case of ethylene oxidation
publisher Elsevier Inc.
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/27439
_version_ 1643795263659180032
score 13.214268

Similar Items