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Effect of the activation temperature on the state of gold supported on titania: An FT-IR spectroscopic study
The effect of the pre-treatment conditions on the evolution of gold species on an Au/TiO 2 sample prepared by deposition–precipitation with urea has been followed by FT-IR spectroscopy of adsorbed CO. Gold is in the form of Au 3+ species on the as-prepared sample and is not affected by evacuation at...
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| Published in: | Applied catalysis. A, General General, 2006-02, Vol.301 (1), p.106-114 |
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| Main Authors: | , , , , , |
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| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c436t-29f01fd0325c0c5bf6b7957248ff3ac73214eab76925a8fbd6a7437b07591d5d3 |
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| cites | cdi_FETCH-LOGICAL-c436t-29f01fd0325c0c5bf6b7957248ff3ac73214eab76925a8fbd6a7437b07591d5d3 |
| container_end_page | 114 |
| container_issue | 1 |
| container_start_page | 106 |
| container_title | Applied catalysis. A, General |
| container_volume | 301 |
| creator | Venkov, Tz Fajerwerg, K. Delannoy, L. Klimev, Hr Hadjiivanov, K. Louis, C. |
| description | The effect of the pre-treatment conditions on the evolution of gold species on an Au/TiO
2 sample prepared by deposition–precipitation with urea has been followed by FT-IR spectroscopy of adsorbed CO. Gold is in the form of Au
3+ species on the as-prepared sample and is not affected by evacuation at ambient temperature. However, the Au
3+ species are readily reduced by CO at ambient temperature giving rise immediately to Au
+ cations (the corresponding carbonyls displaying a band at 2168
cm
−1), which are then slowly converted into metallic gold (carbonyl band at around 2106
cm
−1). The Au
3+ species are reduced to metal gold (respective carbonyl bands in the 2135–2100
cm
−1 region) when a fresh sample is heated at
T
≥
473
K. Water was found to affect CO adsorption on metal gold sites only slightly. Oxidation of Au
0/TiO
2 by oxygen failed to produce cationic gold species. However, metallic gold was oxidized by heating the sample in a NO
+
O
2 mixture even at 573
K. |
| doi_str_mv | 10.1016/j.apcata.2005.11.019 |
| format | article |
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2 sample prepared by deposition–precipitation with urea has been followed by FT-IR spectroscopy of adsorbed CO. Gold is in the form of Au
3+ species on the as-prepared sample and is not affected by evacuation at ambient temperature. However, the Au
3+ species are readily reduced by CO at ambient temperature giving rise immediately to Au
+ cations (the corresponding carbonyls displaying a band at 2168
cm
−1), which are then slowly converted into metallic gold (carbonyl band at around 2106
cm
−1). The Au
3+ species are reduced to metal gold (respective carbonyl bands in the 2135–2100
cm
−1 region) when a fresh sample is heated at
T
≥
473
K. Water was found to affect CO adsorption on metal gold sites only slightly. Oxidation of Au
0/TiO
2 by oxygen failed to produce cationic gold species. However, metallic gold was oxidized by heating the sample in a NO
+
O
2 mixture even at 573
K.</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2005.11.019</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Adsorption ; Carbon monoxide ; Catalysis ; Chemical Sciences ; Chemistry ; Coordination chemistry ; Exact sciences and technology ; General and physical chemistry ; Gold ; Infrared spectroscopy ; Surface physical chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><ispartof>Applied catalysis. A, General, 2006-02, Vol.301 (1), p.106-114</ispartof><rights>2005 Elsevier B.V.</rights><rights>2006 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c436t-29f01fd0325c0c5bf6b7957248ff3ac73214eab76925a8fbd6a7437b07591d5d3</citedby><cites>FETCH-LOGICAL-c436t-29f01fd0325c0c5bf6b7957248ff3ac73214eab76925a8fbd6a7437b07591d5d3</cites><orcidid>0000-0002-3897-3380</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27903,27904</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17517397$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-03663503$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Venkov, Tz</creatorcontrib><creatorcontrib>Fajerwerg, K.</creatorcontrib><creatorcontrib>Delannoy, L.</creatorcontrib><creatorcontrib>Klimev, Hr</creatorcontrib><creatorcontrib>Hadjiivanov, K.</creatorcontrib><creatorcontrib>Louis, C.</creatorcontrib><title>Effect of the activation temperature on the state of gold supported on titania: An FT-IR spectroscopic study</title><title>Applied catalysis. A, General</title><description>The effect of the pre-treatment conditions on the evolution of gold species on an Au/TiO
2 sample prepared by deposition–precipitation with urea has been followed by FT-IR spectroscopy of adsorbed CO. Gold is in the form of Au
3+ species on the as-prepared sample and is not affected by evacuation at ambient temperature. However, the Au
3+ species are readily reduced by CO at ambient temperature giving rise immediately to Au
+ cations (the corresponding carbonyls displaying a band at 2168
cm
−1), which are then slowly converted into metallic gold (carbonyl band at around 2106
cm
−1). The Au
3+ species are reduced to metal gold (respective carbonyl bands in the 2135–2100
cm
−1 region) when a fresh sample is heated at
T
≥
473
K. Water was found to affect CO adsorption on metal gold sites only slightly. Oxidation of Au
0/TiO
2 by oxygen failed to produce cationic gold species. However, metallic gold was oxidized by heating the sample in a NO
+
O
2 mixture even at 573
K.</description><subject>Adsorption</subject><subject>Carbon monoxide</subject><subject>Catalysis</subject><subject>Chemical Sciences</subject><subject>Chemistry</subject><subject>Coordination chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Gold</subject><subject>Infrared spectroscopy</subject><subject>Surface physical chemistry</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE1r3DAQhkVpodu0_6AHXXrowe7IsiS7h8ISkiawUCgp9CbG-mi0OLaRtAv595Hr0txyEqN53pHmIeQjg5oBk1-ONS4GM9YNgKgZq4H1r8iOdYpXvFPiNdlB38iqk_D7LXmX0hEAmrYXOzJeee9MprOn-d5RNDmcMYd5otk9LC5iPkVH17J0U8bsVvTPPFqaTssyx-zs33bIOAX8SvcTvb6rbn_StJS5cU5mXoIp0ZN9fE_eeByT-_DvvCC_rq_uLm-qw4_vt5f7Q2VaLnPV9B6Yt8AbYcCIwctB9UI1bec9R6N4w1qHg5J9I7Dzg5WoWq4GUKJnVlh-QT5vc-9x1EsMDxgf9YxB3-wPer0DLiUXwM-ssO3GmvLXFJ3_H2CgV7v6qDe7erWrGdPFbol92mILJoOjjziZkJ6zSjDFe1W4bxvnyr7n4KJOJrjJOBti8aPtHF5-6AlBZ5Hf</recordid><startdate>200602</startdate><enddate>200602</enddate><creator>Venkov, Tz</creator><creator>Fajerwerg, K.</creator><creator>Delannoy, L.</creator><creator>Klimev, Hr</creator><creator>Hadjiivanov, K.</creator><creator>Louis, C.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-3897-3380</orcidid></search><sort><creationdate>200602</creationdate><title>Effect of the activation temperature on the state of gold supported on titania: An FT-IR spectroscopic study</title><author>Venkov, Tz ; Fajerwerg, K. ; Delannoy, L. ; Klimev, Hr ; Hadjiivanov, K. ; Louis, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c436t-29f01fd0325c0c5bf6b7957248ff3ac73214eab76925a8fbd6a7437b07591d5d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Adsorption</topic><topic>Carbon monoxide</topic><topic>Catalysis</topic><topic>Chemical Sciences</topic><topic>Chemistry</topic><topic>Coordination chemistry</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Gold</topic><topic>Infrared spectroscopy</topic><topic>Surface physical chemistry</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Venkov, Tz</creatorcontrib><creatorcontrib>Fajerwerg, K.</creatorcontrib><creatorcontrib>Delannoy, L.</creatorcontrib><creatorcontrib>Klimev, Hr</creatorcontrib><creatorcontrib>Hadjiivanov, K.</creatorcontrib><creatorcontrib>Louis, C.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Applied catalysis. A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Venkov, Tz</au><au>Fajerwerg, K.</au><au>Delannoy, L.</au><au>Klimev, Hr</au><au>Hadjiivanov, K.</au><au>Louis, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of the activation temperature on the state of gold supported on titania: An FT-IR spectroscopic study</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2006-02</date><risdate>2006</risdate><volume>301</volume><issue>1</issue><spage>106</spage><epage>114</epage><pages>106-114</pages><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>The effect of the pre-treatment conditions on the evolution of gold species on an Au/TiO
2 sample prepared by deposition–precipitation with urea has been followed by FT-IR spectroscopy of adsorbed CO. Gold is in the form of Au
3+ species on the as-prepared sample and is not affected by evacuation at ambient temperature. However, the Au
3+ species are readily reduced by CO at ambient temperature giving rise immediately to Au
+ cations (the corresponding carbonyls displaying a band at 2168
cm
−1), which are then slowly converted into metallic gold (carbonyl band at around 2106
cm
−1). The Au
3+ species are reduced to metal gold (respective carbonyl bands in the 2135–2100
cm
−1 region) when a fresh sample is heated at
T
≥
473
K. Water was found to affect CO adsorption on metal gold sites only slightly. Oxidation of Au
0/TiO
2 by oxygen failed to produce cationic gold species. However, metallic gold was oxidized by heating the sample in a NO
+
O
2 mixture even at 573
K.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2005.11.019</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-3897-3380</orcidid></addata></record> |
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| ispartof | Applied catalysis. A, General, 2006-02, Vol.301 (1), p.106-114 |
| issn | 0926-860X 1873-3875 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_hal_03663503v1 |
| source | ScienceDirect Journals |
| subjects | Adsorption Carbon monoxide Catalysis Chemical Sciences Chemistry Coordination chemistry Exact sciences and technology General and physical chemistry Gold Infrared spectroscopy Surface physical chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Effect of the activation temperature on the state of gold supported on titania: An FT-IR spectroscopic study |
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