Cu oxide deposited on shape-controlled ceria nanocrystals for CO oxidation: influence of interface-driven oxidation states on catalytic activity
The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on Cu deposited on CeO 2 nanocrystals has been elucidated by varying the shape of the ceria (CeO 2 ) suppo...
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| Veröffentlicht in: | Catalysis science & technology 2021-09, Vol.11 (18), p.6134-6142 |
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| creator | Prabhakar Reddy, Kasala Choi, Hanseul Kim, Daeho Ryoo, Ryong Park, Jeong Young |
| description | The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on Cu deposited on CeO
2
nanocrystals has been elucidated by varying the shape of the ceria (CeO
2
) support. Three types of CeO
2
nanocrystals were prepared for supporting Cu oxide (CuO
x
): CeO
2
nanocubes (NCs), nanorods (NRs) and nanospheres (NSs). The Cu oxide deposited on CeO
2
NC has shown higher CO oxidation activity at a lower temperature than that over the NR and NS surfaces. Furthermore, characterization of structure and oxidation states revealed that the stable Cu
1+
oxidation state on the surface of CuO
x
/CeO
2
NC formed at a low loading of copper (∼1.5 wt%), which acts as an active site for the CO oxidation. In contrast to the high surface area and redox properties, a systematic catalytic activity trend was observed among the catalysts with the extent of the Cu
1+
oxidation state. We demonstrate that the polar (100) surface facets of NCs contribute significantly to the formation of surface hydroxyl groups, which are required for the selective and stable Cu
1+
state at a low loading.
The polar CeO
2
(100) surface facets contribute considerably to the formation of surface hydroxyl groups, which are necessary for selective, stable Cu
1+
state loading and enhancement of CO oxidation activity. |
| doi_str_mv | 10.1039/d1cy01269j |
| format | Article |
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2
nanocrystals has been elucidated by varying the shape of the ceria (CeO
2
) support. Three types of CeO
2
nanocrystals were prepared for supporting Cu oxide (CuO
x
): CeO
2
nanocubes (NCs), nanorods (NRs) and nanospheres (NSs). The Cu oxide deposited on CeO
2
NC has shown higher CO oxidation activity at a lower temperature than that over the NR and NS surfaces. Furthermore, characterization of structure and oxidation states revealed that the stable Cu
1+
oxidation state on the surface of CuO
x
/CeO
2
NC formed at a low loading of copper (∼1.5 wt%), which acts as an active site for the CO oxidation. In contrast to the high surface area and redox properties, a systematic catalytic activity trend was observed among the catalysts with the extent of the Cu
1+
oxidation state. We demonstrate that the polar (100) surface facets of NCs contribute significantly to the formation of surface hydroxyl groups, which are required for the selective and stable Cu
1+
state at a low loading.
The polar CeO
2
(100) surface facets contribute considerably to the formation of surface hydroxyl groups, which are necessary for selective, stable Cu
1+
state loading and enhancement of CO oxidation activity.</description><identifier>ISSN: 2044-4753</identifier><identifier>EISSN: 2044-4761</identifier><identifier>DOI: 10.1039/d1cy01269j</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Carbon monoxide ; Catalysis ; Catalysts ; Catalytic activity ; Cerium oxides ; Copper ; Hydroxyl groups ; Nanocrystals ; Nanorods ; Nanospheres ; Oxidation ; Structural analysis ; Valence</subject><ispartof>Catalysis science & technology, 2021-09, Vol.11 (18), p.6134-6142</ispartof><rights>Copyright Royal Society of Chemistry 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c281t-f3a8d3a3f3fdb800f4312723a12d33db97a9224aebf09c79946cbc687a3a7ca93</citedby><cites>FETCH-LOGICAL-c281t-f3a8d3a3f3fdb800f4312723a12d33db97a9224aebf09c79946cbc687a3a7ca93</cites><orcidid>0000-0002-8132-3076 ; 0000-0002-9989-1549 ; 0000-0003-0047-3329</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Prabhakar Reddy, Kasala</creatorcontrib><creatorcontrib>Choi, Hanseul</creatorcontrib><creatorcontrib>Kim, Daeho</creatorcontrib><creatorcontrib>Ryoo, Ryong</creatorcontrib><creatorcontrib>Park, Jeong Young</creatorcontrib><title>Cu oxide deposited on shape-controlled ceria nanocrystals for CO oxidation: influence of interface-driven oxidation states on catalytic activity</title><title>Catalysis science & technology</title><description>The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on Cu deposited on CeO
2
nanocrystals has been elucidated by varying the shape of the ceria (CeO
2
) support. Three types of CeO
2
nanocrystals were prepared for supporting Cu oxide (CuO
x
): CeO
2
nanocubes (NCs), nanorods (NRs) and nanospheres (NSs). The Cu oxide deposited on CeO
2
NC has shown higher CO oxidation activity at a lower temperature than that over the NR and NS surfaces. Furthermore, characterization of structure and oxidation states revealed that the stable Cu
1+
oxidation state on the surface of CuO
x
/CeO
2
NC formed at a low loading of copper (∼1.5 wt%), which acts as an active site for the CO oxidation. In contrast to the high surface area and redox properties, a systematic catalytic activity trend was observed among the catalysts with the extent of the Cu
1+
oxidation state. We demonstrate that the polar (100) surface facets of NCs contribute significantly to the formation of surface hydroxyl groups, which are required for the selective and stable Cu
1+
state at a low loading.
The polar CeO
2
(100) surface facets contribute considerably to the formation of surface hydroxyl groups, which are necessary for selective, stable Cu
1+
state loading and enhancement of CO oxidation activity.</description><subject>Carbon monoxide</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Cerium oxides</subject><subject>Copper</subject><subject>Hydroxyl groups</subject><subject>Nanocrystals</subject><subject>Nanorods</subject><subject>Nanospheres</subject><subject>Oxidation</subject><subject>Structural analysis</subject><subject>Valence</subject><issn>2044-4753</issn><issn>2044-4761</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNpFkUtLw0AQx4MoWGov3oUFb0J0H0mT9SbxTaEXPXgKk33glrpbdzfFfAs_sttW2rnMg9_8_zCTZecEXxPM-I0kYsCETvniKBtRXBR5UU3J8b4u2Wk2CWGBUxSc4JqOst-mR-7HSIWkWrlgopLIWRQ-YaVy4Wz0brlMM6G8AWTBOuGHEGEZkHYeNfPtNkTj7C0yVi97ZYVCTqcmKq9BqFx6s1b2AKK0H1XY-AhIUkM0AoGIZm3icJad6KSuJv95nL0_Prw1z_ls_vTS3M1yQWsSc82glgyYZlp2Nca6YIRWlAGhkjHZ8Qo4pQWoTmMuKs6LqejEtK6AQSWAs3F2udNdeffdqxDbheu9TZYtLauClrSqy0Rd7SjhXQhe6XblzRf4oSW43Ry9vSfNx_borwm-2ME-iD13eAr7A6aDgY4</recordid><startdate>20210921</startdate><enddate>20210921</enddate><creator>Prabhakar Reddy, Kasala</creator><creator>Choi, Hanseul</creator><creator>Kim, Daeho</creator><creator>Ryoo, Ryong</creator><creator>Park, Jeong Young</creator><general>Royal Society of Chemistry</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0002-8132-3076</orcidid><orcidid>https://orcid.org/0000-0002-9989-1549</orcidid><orcidid>https://orcid.org/0000-0003-0047-3329</orcidid></search><sort><creationdate>20210921</creationdate><title>Cu oxide deposited on shape-controlled ceria nanocrystals for CO oxidation: influence of interface-driven oxidation states on catalytic activity</title><author>Prabhakar Reddy, Kasala ; Choi, Hanseul ; Kim, Daeho ; Ryoo, Ryong ; Park, Jeong Young</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c281t-f3a8d3a3f3fdb800f4312723a12d33db97a9224aebf09c79946cbc687a3a7ca93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Carbon monoxide</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Catalytic activity</topic><topic>Cerium oxides</topic><topic>Copper</topic><topic>Hydroxyl groups</topic><topic>Nanocrystals</topic><topic>Nanorods</topic><topic>Nanospheres</topic><topic>Oxidation</topic><topic>Structural analysis</topic><topic>Valence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Prabhakar Reddy, Kasala</creatorcontrib><creatorcontrib>Choi, Hanseul</creatorcontrib><creatorcontrib>Kim, Daeho</creatorcontrib><creatorcontrib>Ryoo, Ryong</creatorcontrib><creatorcontrib>Park, Jeong Young</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Catalysis science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Prabhakar Reddy, Kasala</au><au>Choi, Hanseul</au><au>Kim, Daeho</au><au>Ryoo, Ryong</au><au>Park, Jeong Young</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cu oxide deposited on shape-controlled ceria nanocrystals for CO oxidation: influence of interface-driven oxidation states on catalytic activity</atitle><jtitle>Catalysis science & technology</jtitle><date>2021-09-21</date><risdate>2021</risdate><volume>11</volume><issue>18</issue><spage>6134</spage><epage>6142</epage><pages>6134-6142</pages><issn>2044-4753</issn><eissn>2044-4761</eissn><abstract>The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on Cu deposited on CeO
2
nanocrystals has been elucidated by varying the shape of the ceria (CeO
2
) support. Three types of CeO
2
nanocrystals were prepared for supporting Cu oxide (CuO
x
): CeO
2
nanocubes (NCs), nanorods (NRs) and nanospheres (NSs). The Cu oxide deposited on CeO
2
NC has shown higher CO oxidation activity at a lower temperature than that over the NR and NS surfaces. Furthermore, characterization of structure and oxidation states revealed that the stable Cu
1+
oxidation state on the surface of CuO
x
/CeO
2
NC formed at a low loading of copper (∼1.5 wt%), which acts as an active site for the CO oxidation. In contrast to the high surface area and redox properties, a systematic catalytic activity trend was observed among the catalysts with the extent of the Cu
1+
oxidation state. We demonstrate that the polar (100) surface facets of NCs contribute significantly to the formation of surface hydroxyl groups, which are required for the selective and stable Cu
1+
state at a low loading.
The polar CeO
2
(100) surface facets contribute considerably to the formation of surface hydroxyl groups, which are necessary for selective, stable Cu
1+
state loading and enhancement of CO oxidation activity.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/d1cy01269j</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-8132-3076</orcidid><orcidid>https://orcid.org/0000-0002-9989-1549</orcidid><orcidid>https://orcid.org/0000-0003-0047-3329</orcidid></addata></record> |
| fulltext | fulltext |
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| ispartof | Catalysis science & technology, 2021-09, Vol.11 (18), p.6134-6142 |
| issn | 2044-4753 2044-4761 |
| language | eng |
| recordid | cdi_crossref_primary_10_1039_D1CY01269J |
| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Carbon monoxide Catalysis Catalysts Catalytic activity Cerium oxides Copper Hydroxyl groups Nanocrystals Nanorods Nanospheres Oxidation Structural analysis Valence |
| title | Cu oxide deposited on shape-controlled ceria nanocrystals for CO oxidation: influence of interface-driven oxidation states on catalytic activity |
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