Effect of Ag doping on Pd/Ag-CeO 2 catalysts for CO and C 3 H 6 oxidation
To achieve high fuel efficiency and low emission in automobiles, it is necessary to develop highly active diesel oxidation catalysts (DOCs). Pd/CeO catalysts have been widely used as active catalysts for CO and C H oxidation reactions. Additionally, Ag has been reported to enhance the oxygen storage...
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| Veröffentlicht in: | Journal of hazardous materials 2021-02, Vol.415, p.125373 |
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| container_title | Journal of hazardous materials |
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| creator | Seo, Yaeun Lee, Min Woo Kim, Hyun Jae Choung, Jin Woo Jung, ChangHo Kim, Chang Hwan Lee, Kwan-Young |
| description | To achieve high fuel efficiency and low emission in automobiles, it is necessary to develop highly active diesel oxidation catalysts (DOCs). Pd/CeO
catalysts have been widely used as active catalysts for CO and C
H
oxidation reactions. Additionally, Ag has been reported to enhance the oxygen storage capacity (OSC) of CeO
, which contributes to the oxidation ability of Pd/CeO
. In this study, Pd/Ag-CeO
catalysts were used for CO and C
H
oxidation reactions. When CeO
was doped with appropriate amounts of Ag, reducibility and CO desorption rate were increased, which confirmed the high OSCs of Ag-doped catalysts. However, Ag particles were formed and the Ce
/Ce
ratio decreased when CeO
was doped with excess amounts of Ag. In addition, reduced Pd (Pd
), which is an active species for C
H
oxidation, was formed and maintained even under oxidative reaction conditions. Since the removal of C
H
is important for the oxidation of CO and C
H
, the catalyst with the highest Pd
fraction (Pd/0.1Ag-CeO
and Pd/0.3Ag-CeO
) presented improved catalytic activity. Consequently, the optimal amount of Ag enhanced the OSC of Pd/Ag-CeO
catalysts and formed active Pd
species under oxidative conditions, which resulted in the excellent catalytic activity of Pd/Ag-CeO
for the CO and C
H
oxidation reaction. |
| doi_str_mv | 10.1016/j.jhazmat.2021.125373 |
| format | Article |
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catalysts have been widely used as active catalysts for CO and C
H
oxidation reactions. Additionally, Ag has been reported to enhance the oxygen storage capacity (OSC) of CeO
, which contributes to the oxidation ability of Pd/CeO
. In this study, Pd/Ag-CeO
catalysts were used for CO and C
H
oxidation reactions. When CeO
was doped with appropriate amounts of Ag, reducibility and CO desorption rate were increased, which confirmed the high OSCs of Ag-doped catalysts. However, Ag particles were formed and the Ce
/Ce
ratio decreased when CeO
was doped with excess amounts of Ag. In addition, reduced Pd (Pd
), which is an active species for C
H
oxidation, was formed and maintained even under oxidative reaction conditions. Since the removal of C
H
is important for the oxidation of CO and C
H
, the catalyst with the highest Pd
fraction (Pd/0.1Ag-CeO
and Pd/0.3Ag-CeO
) presented improved catalytic activity. Consequently, the optimal amount of Ag enhanced the OSC of Pd/Ag-CeO
catalysts and formed active Pd
species under oxidative conditions, which resulted in the excellent catalytic activity of Pd/Ag-CeO
for the CO and C
H
oxidation reaction.</description><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/j.jhazmat.2021.125373</identifier><identifier>PMID: 33765567</identifier><language>eng</language><publisher>Netherlands</publisher><ispartof>Journal of hazardous materials, 2021-02, Vol.415, p.125373</ispartof><rights>Copyright © 2021 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33765567$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Seo, Yaeun</creatorcontrib><creatorcontrib>Lee, Min Woo</creatorcontrib><creatorcontrib>Kim, Hyun Jae</creatorcontrib><creatorcontrib>Choung, Jin Woo</creatorcontrib><creatorcontrib>Jung, ChangHo</creatorcontrib><creatorcontrib>Kim, Chang Hwan</creatorcontrib><creatorcontrib>Lee, Kwan-Young</creatorcontrib><title>Effect of Ag doping on Pd/Ag-CeO 2 catalysts for CO and C 3 H 6 oxidation</title><title>Journal of hazardous materials</title><addtitle>J Hazard Mater</addtitle><description>To achieve high fuel efficiency and low emission in automobiles, it is necessary to develop highly active diesel oxidation catalysts (DOCs). Pd/CeO
catalysts have been widely used as active catalysts for CO and C
H
oxidation reactions. Additionally, Ag has been reported to enhance the oxygen storage capacity (OSC) of CeO
, which contributes to the oxidation ability of Pd/CeO
. In this study, Pd/Ag-CeO
catalysts were used for CO and C
H
oxidation reactions. When CeO
was doped with appropriate amounts of Ag, reducibility and CO desorption rate were increased, which confirmed the high OSCs of Ag-doped catalysts. However, Ag particles were formed and the Ce
/Ce
ratio decreased when CeO
was doped with excess amounts of Ag. In addition, reduced Pd (Pd
), which is an active species for C
H
oxidation, was formed and maintained even under oxidative reaction conditions. Since the removal of C
H
is important for the oxidation of CO and C
H
, the catalyst with the highest Pd
fraction (Pd/0.1Ag-CeO
and Pd/0.3Ag-CeO
) presented improved catalytic activity. Consequently, the optimal amount of Ag enhanced the OSC of Pd/Ag-CeO
catalysts and formed active Pd
species under oxidative conditions, which resulted in the excellent catalytic activity of Pd/Ag-CeO
for the CO and C
H
oxidation reaction.</description><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFzb0OgjAUQOHGxAj-PILmvgDQcqV1JUSjEw7upFqKEKGE1kR8ehednc7yJYeQNaMho4xHTdjc5buVLoxpzEIWJyhwQny2ExggIvfI3NqGUspEsp0RD1HwJOHCJ6e91uXNgdGQVqBMX3cVmA7OKkqrICtziOEmnXyM1lnQZoAsB9kpyADhCBzMq1bS1aZbkqmWD1uuvl2QzWF_yY5B_7y2pSr6oW7lMBa_N_4FH2vfPao</recordid><startdate>20210224</startdate><enddate>20210224</enddate><creator>Seo, Yaeun</creator><creator>Lee, Min Woo</creator><creator>Kim, Hyun Jae</creator><creator>Choung, Jin Woo</creator><creator>Jung, ChangHo</creator><creator>Kim, Chang Hwan</creator><creator>Lee, Kwan-Young</creator><scope>NPM</scope></search><sort><creationdate>20210224</creationdate><title>Effect of Ag doping on Pd/Ag-CeO 2 catalysts for CO and C 3 H 6 oxidation</title><author>Seo, Yaeun ; Lee, Min Woo ; Kim, Hyun Jae ; Choung, Jin Woo ; Jung, ChangHo ; Kim, Chang Hwan ; Lee, Kwan-Young</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-pubmed_primary_337655673</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Seo, Yaeun</creatorcontrib><creatorcontrib>Lee, Min Woo</creatorcontrib><creatorcontrib>Kim, Hyun Jae</creatorcontrib><creatorcontrib>Choung, Jin Woo</creatorcontrib><creatorcontrib>Jung, ChangHo</creatorcontrib><creatorcontrib>Kim, Chang Hwan</creatorcontrib><creatorcontrib>Lee, Kwan-Young</creatorcontrib><collection>PubMed</collection><jtitle>Journal of hazardous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Seo, Yaeun</au><au>Lee, Min Woo</au><au>Kim, Hyun Jae</au><au>Choung, Jin Woo</au><au>Jung, ChangHo</au><au>Kim, Chang Hwan</au><au>Lee, Kwan-Young</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Ag doping on Pd/Ag-CeO 2 catalysts for CO and C 3 H 6 oxidation</atitle><jtitle>Journal of hazardous materials</jtitle><addtitle>J Hazard Mater</addtitle><date>2021-02-24</date><risdate>2021</risdate><volume>415</volume><spage>125373</spage><pages>125373-</pages><eissn>1873-3336</eissn><abstract>To achieve high fuel efficiency and low emission in automobiles, it is necessary to develop highly active diesel oxidation catalysts (DOCs). Pd/CeO
catalysts have been widely used as active catalysts for CO and C
H
oxidation reactions. Additionally, Ag has been reported to enhance the oxygen storage capacity (OSC) of CeO
, which contributes to the oxidation ability of Pd/CeO
. In this study, Pd/Ag-CeO
catalysts were used for CO and C
H
oxidation reactions. When CeO
was doped with appropriate amounts of Ag, reducibility and CO desorption rate were increased, which confirmed the high OSCs of Ag-doped catalysts. However, Ag particles were formed and the Ce
/Ce
ratio decreased when CeO
was doped with excess amounts of Ag. In addition, reduced Pd (Pd
), which is an active species for C
H
oxidation, was formed and maintained even under oxidative reaction conditions. Since the removal of C
H
is important for the oxidation of CO and C
H
, the catalyst with the highest Pd
fraction (Pd/0.1Ag-CeO
and Pd/0.3Ag-CeO
) presented improved catalytic activity. Consequently, the optimal amount of Ag enhanced the OSC of Pd/Ag-CeO
catalysts and formed active Pd
species under oxidative conditions, which resulted in the excellent catalytic activity of Pd/Ag-CeO
for the CO and C
H
oxidation reaction.</abstract><cop>Netherlands</cop><pmid>33765567</pmid><doi>10.1016/j.jhazmat.2021.125373</doi></addata></record> |
| fulltext | fulltext |
| identifier | EISSN: 1873-3336 |
| ispartof | Journal of hazardous materials, 2021-02, Vol.415, p.125373 |
| issn | 1873-3336 |
| language | eng |
| recordid | cdi_pubmed_primary_33765567 |
| source | Elsevier ScienceDirect Journals |
| title | Effect of Ag doping on Pd/Ag-CeO 2 catalysts for CO and C 3 H 6 oxidation |
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