DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chi, Seunghyuck | ko |
dc.contributor.author | Ji, Sang Gu | ko |
dc.contributor.author | Kim, Minho | ko |
dc.contributor.author | Kim, Hyungjun | ko |
dc.contributor.author | Choi, Chang Hyuck | ko |
dc.contributor.author | Choi, Minkee | ko |
dc.date.accessioned | 2023-03-27T05:00:36Z | - |
dc.date.available | 2023-03-27T05:00:36Z | - |
dc.date.created | 2023-03-27 | - |
dc.date.created | 2023-03-27 | - |
dc.date.issued | 2023-03 | - |
dc.identifier.citation | JOURNAL OF CATALYSIS, v.419, pp.49 - 57 | - |
dc.identifier.issn | 0021-9517 | - |
dc.identifier.uri | http://hdl.handle.net/10203/305809 | - |
dc.description.abstract | Although often overlooked, single-atom catalysts inevitably contain heterogeneous active sites and their structures can further change under reaction conditions. Here, we conduct rigorous in situ X-ray absorp-tion spectroscopy with 1-10 wt% Pt on S-doped zeolite-templated carbon (SZTC) to elucidate their remarkable electrocatalytic H2O2 synthesis properties. SZTC with a curved polyaromatic framework and abundant sulfur functional groups can stabilize isolated Pt sites with up to 10 wt% Pt loading. Although all catalysts contain apparently identical Pt-S4 sites in their as-synthesized form, the Pt-specific activity increases rapidly with increasing Pt loading. It appears that Pt first forms inert Pt-S4 in SZTC and then forms labile Pt-S4 with increasing Pt loading. Upon contact with aqueous electrolytes, only the labile sites are converted to true active sites, Pt-S2(H2O)2, via ligand exchange with H2O. The results provide invaluable insights for understanding the heterogeneity and dynamic structural changes of single-atom catalysts. (c) 2023 Elsevier Inc. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | - |
dc.title | Structural heterogeneity of single-atom catalysts and true active site generation via ligand exchange during electrochemical H2O2 production | - |
dc.type | Article | - |
dc.identifier.wosid | 000942442700001 | - |
dc.identifier.scopusid | 2-s2.0-85148040922 | - |
dc.type.rims | ART | - |
dc.citation.volume | 419 | - |
dc.citation.beginningpage | 49 | - |
dc.citation.endingpage | 57 | - |
dc.citation.publicationname | JOURNAL OF CATALYSIS | - |
dc.identifier.doi | 10.1016/j.jcat.2023.02.003 | - |
dc.contributor.localauthor | Kim, Hyungjun | - |
dc.contributor.localauthor | Choi, Minkee | - |
dc.contributor.nonIdAuthor | Chi, Seunghyuck | - |
dc.contributor.nonIdAuthor | Ji, Sang Gu | - |
dc.contributor.nonIdAuthor | Kim, Minho | - |
dc.contributor.nonIdAuthor | Choi, Chang Hyuck | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Single -atom catalysts | - |
dc.subject.keywordAuthor | Heterogeneity | - |
dc.subject.keywordAuthor | Ligand exchange | - |
dc.subject.keywordAuthor | In situ XAS | - |
dc.subject.keywordAuthor | Hydrogen peroxide | - |
dc.subject.keywordPlus | OXYGEN REDUCTION | - |
dc.subject.keywordPlus | HYDROGEN-PEROXIDE | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | PLATINUM | - |
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