Reduction properties of Ce in CeOx/Pt/Al2O3 catalysts
A controlled surface reaction (CSR) technique has been successfully employed to prepare a series of CeO x modified Pt/Al 2 O 3 catalysts, offering a unique system to specifically probe the relationship between Ce and Pt without any bulk CeO 2 present. Ce L 3 edge X-ray absorption near edge structure...
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| Veröffentlicht in: | Catalysis, structure & reactivity structure & reactivity, 2015-04, Vol.1 (2), p.88-94 |
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| creator | Wells, P. P. Crabb, E. M. King, C. R. Fiddy, S. Amieiro-Fonseca, A. Thompsett, D. Russell, A. E. |
| description | A controlled surface reaction (CSR) technique has been successfully employed to prepare a series of CeO
x
modified Pt/Al
2
O
3
catalysts, offering a unique system to specifically probe the relationship between Ce and Pt without any bulk CeO
2
present. Ce L
3
edge X-ray absorption near edge structure (XANES) analysis was used to ascertain the oxidation state of the Ce in the catalyst materials in atmospheres of air, H
2
(g), and CO (g) at room temperature. The XANES data showed that the Ce was present as both Ce
3+
and Ce
4+
oxidation states in an atmosphere of air, becoming predominantly present as Ce
3+
in H
2
and CO. The results indicate the role of Pt in the process, and show that with the absence of bulk CeO
2
, changes in Ce oxidation state can be observed at non-elevated temperatures. The CeO
x
/Pt/Al
2
O
3
catalysts were tested for their performance toward the water gas shift (WGS) reaction and showed improved performance compared to the unmodified Pt/Al
2
O
3
, even at very low concentrations of Ce (∼0.35 wt-%). |
| doi_str_mv | 10.1179/2055075815Y.0000000001 |
| format | Article |
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x
modified Pt/Al
2
O
3
catalysts, offering a unique system to specifically probe the relationship between Ce and Pt without any bulk CeO
2
present. Ce L
3
edge X-ray absorption near edge structure (XANES) analysis was used to ascertain the oxidation state of the Ce in the catalyst materials in atmospheres of air, H
2
(g), and CO (g) at room temperature. The XANES data showed that the Ce was present as both Ce
3+
and Ce
4+
oxidation states in an atmosphere of air, becoming predominantly present as Ce
3+
in H
2
and CO. The results indicate the role of Pt in the process, and show that with the absence of bulk CeO
2
, changes in Ce oxidation state can be observed at non-elevated temperatures. The CeO
x
/Pt/Al
2
O
3
catalysts were tested for their performance toward the water gas shift (WGS) reaction and showed improved performance compared to the unmodified Pt/Al
2
O
3
, even at very low concentrations of Ce (∼0.35 wt-%).</description><identifier>ISSN: 2055-074X</identifier><identifier>EISSN: 2055-0758</identifier><identifier>DOI: 10.1179/2055075815Y.0000000001</identifier><language>eng</language><publisher>Abingdon: Taylor & Francis</publisher><subject>Aluminum oxide ; Carbon monoxide ; Catalysis ; Catalysts ; Ceria ; Cerium oxides ; Control surfaces ; High temperature ; Low concentrations ; Oxidation ; Platinum ; Redox ; Room temperature ; Surface reactions ; Valence ; Water gas ; Water gas shift ; X ray absorption ; XANES</subject><ispartof>Catalysis, structure & reactivity, 2015-04, Vol.1 (2), p.88-94</ispartof><rights>2015 The Author(s). Published by Taylor & Francis 2015</rights><rights>2015 The Author(s). Published by Taylor & Francis. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.tandfonline.com/doi/pdf/10.1179/2055075815Y.0000000001$$EPDF$$P50$$Ginformaworld$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.tandfonline.com/doi/full/10.1179/2055075815Y.0000000001$$EHTML$$P50$$Ginformaworld$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,27479,27901,27902,59116,59117</link.rule.ids></links><search><creatorcontrib>Wells, P. P.</creatorcontrib><creatorcontrib>Crabb, E. M.</creatorcontrib><creatorcontrib>King, C. R.</creatorcontrib><creatorcontrib>Fiddy, S.</creatorcontrib><creatorcontrib>Amieiro-Fonseca, A.</creatorcontrib><creatorcontrib>Thompsett, D.</creatorcontrib><creatorcontrib>Russell, A. E.</creatorcontrib><title>Reduction properties of Ce in CeOx/Pt/Al2O3 catalysts</title><title>Catalysis, structure & reactivity</title><description>A controlled surface reaction (CSR) technique has been successfully employed to prepare a series of CeO
x
modified Pt/Al
2
O
3
catalysts, offering a unique system to specifically probe the relationship between Ce and Pt without any bulk CeO
2
present. Ce L
3
edge X-ray absorption near edge structure (XANES) analysis was used to ascertain the oxidation state of the Ce in the catalyst materials in atmospheres of air, H
2
(g), and CO (g) at room temperature. The XANES data showed that the Ce was present as both Ce
3+
and Ce
4+
oxidation states in an atmosphere of air, becoming predominantly present as Ce
3+
in H
2
and CO. The results indicate the role of Pt in the process, and show that with the absence of bulk CeO
2
, changes in Ce oxidation state can be observed at non-elevated temperatures. The CeO
x
/Pt/Al
2
O
3
catalysts were tested for their performance toward the water gas shift (WGS) reaction and showed improved performance compared to the unmodified Pt/Al
2
O
3
, even at very low concentrations of Ce (∼0.35 wt-%).</description><subject>Aluminum oxide</subject><subject>Carbon monoxide</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Ceria</subject><subject>Cerium oxides</subject><subject>Control surfaces</subject><subject>High temperature</subject><subject>Low concentrations</subject><subject>Oxidation</subject><subject>Platinum</subject><subject>Redox</subject><subject>Room temperature</subject><subject>Surface reactions</subject><subject>Valence</subject><subject>Water gas</subject><subject>Water gas shift</subject><subject>X ray absorption</subject><subject>XANES</subject><issn>2055-074X</issn><issn>2055-0758</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>0YH</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNpNkFtLAzEQhYMoWGr_giz4vO3k1s0-luKlUKiIgj6FSTYLkXVTkxTtv3dLvc3DzMA5zBk-Qi4pTCmt6hkDKaGSisqXKfwUPSGjg1AelNPfXTyfk0lK3gCfMyE5kyMiH1yzs9mHvtjGsHUxe5eK0BZLV_h-6JvP2X2eLTq24YXFjN0-5XRBzlrskpt8zzF5url-XN6V683tarlYl56pOpeWGsPBWYau4kYYaxS0UCMK5pyy3DaUo-HKVXMJtapMCw0IRGtrQGEFH5Or493ht_edS1m_hl3sh0jNWKWASjVXg2txdPm-DfENP0LsGp1x34XYRuytT5pT0Adg-h8w_QeMfwFacl1g</recordid><startdate>20150401</startdate><enddate>20150401</enddate><creator>Wells, P. 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R. ; Fiddy, S. ; Amieiro-Fonseca, A. ; Thompsett, D. ; Russell, A. E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i289t-c1bb30ec2ae73b4bcb80f09aa42ee8c3cd13ab38e7650987bf0d04aacc90a4c43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Aluminum oxide</topic><topic>Carbon monoxide</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Ceria</topic><topic>Cerium oxides</topic><topic>Control surfaces</topic><topic>High temperature</topic><topic>Low concentrations</topic><topic>Oxidation</topic><topic>Platinum</topic><topic>Redox</topic><topic>Room temperature</topic><topic>Surface reactions</topic><topic>Valence</topic><topic>Water gas</topic><topic>Water gas shift</topic><topic>X ray absorption</topic><topic>XANES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wells, P. P.</creatorcontrib><creatorcontrib>Crabb, E. M.</creatorcontrib><creatorcontrib>King, C. R.</creatorcontrib><creatorcontrib>Fiddy, S.</creatorcontrib><creatorcontrib>Amieiro-Fonseca, A.</creatorcontrib><creatorcontrib>Thompsett, D.</creatorcontrib><creatorcontrib>Russell, A. E.</creatorcontrib><collection>Taylor & Francis Open Access</collection><collection>ProQuest Central (Corporate)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Materials Research Database</collection><collection>Research Library</collection><collection>Research Library (Corporate)</collection><collection>ProQuest Central (New)</collection><collection>ProQuest One Academic (New)</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Middle East (New)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><jtitle>Catalysis, structure & reactivity</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wells, P. P.</au><au>Crabb, E. M.</au><au>King, C. R.</au><au>Fiddy, S.</au><au>Amieiro-Fonseca, A.</au><au>Thompsett, D.</au><au>Russell, A. E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction properties of Ce in CeOx/Pt/Al2O3 catalysts</atitle><jtitle>Catalysis, structure & reactivity</jtitle><date>2015-04-01</date><risdate>2015</risdate><volume>1</volume><issue>2</issue><spage>88</spage><epage>94</epage><pages>88-94</pages><issn>2055-074X</issn><eissn>2055-0758</eissn><abstract>A controlled surface reaction (CSR) technique has been successfully employed to prepare a series of CeO
x
modified Pt/Al
2
O
3
catalysts, offering a unique system to specifically probe the relationship between Ce and Pt without any bulk CeO
2
present. Ce L
3
edge X-ray absorption near edge structure (XANES) analysis was used to ascertain the oxidation state of the Ce in the catalyst materials in atmospheres of air, H
2
(g), and CO (g) at room temperature. The XANES data showed that the Ce was present as both Ce
3+
and Ce
4+
oxidation states in an atmosphere of air, becoming predominantly present as Ce
3+
in H
2
and CO. The results indicate the role of Pt in the process, and show that with the absence of bulk CeO
2
, changes in Ce oxidation state can be observed at non-elevated temperatures. The CeO
x
/Pt/Al
2
O
3
catalysts were tested for their performance toward the water gas shift (WGS) reaction and showed improved performance compared to the unmodified Pt/Al
2
O
3
, even at very low concentrations of Ce (∼0.35 wt-%).</abstract><cop>Abingdon</cop><pub>Taylor & Francis</pub><doi>10.1179/2055075815Y.0000000001</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| source | Taylor & Francis Open Access; Maney Open Access and freely available journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Aluminum oxide Carbon monoxide Catalysis Catalysts Ceria Cerium oxides Control surfaces High temperature Low concentrations Oxidation Platinum Redox Room temperature Surface reactions Valence Water gas Water gas shift X ray absorption XANES |
| title | Reduction properties of Ce in CeOx/Pt/Al2O3 catalysts |
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