DC Field | Value | Language |
---|---|---|
dc.contributor.author | Woo, Jinwoo | - |
dc.contributor.author | Lim, June Sung | - |
dc.contributor.author | Lim, Taejung | - |
dc.contributor.author | Baek, Du San | - |
dc.contributor.author | Kim, Jae Hyung | - |
dc.contributor.author | Lee, Jong Hoon | - |
dc.contributor.author | Jeong, Hu Young | - |
dc.contributor.author | Choi, Chang Hyuck | - |
dc.contributor.author | Joo, Sang Hoon | - |
dc.date.accessioned | 2023-02-23T05:50:21Z | - |
dc.date.available | 2023-02-23T05:50:21Z | - |
dc.date.created | 2023-02-22 | - |
dc.date.issued | 2023-01 | - |
dc.identifier.issn | 2753-801X | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/115465 | - |
dc.description.abstract | A class of Fe,N-codoped carbon (Fe–N/C) electrocatalysts has made remarkable advances as highly promising non-Pt group metal catalysts for the oxygen reduction reaction (ORR). However, the design of Fe–N/C catalysts whose active site structure and O2 activation mode mimic those of an enzymatic ORR catalyst still remains a challenge. Herein, we report the preparation of mesoporous Fe–N/C catalysts with tunable tube- or rod-like frameworks and carbon layer numbers via solid-state nanocasting of mesoporous silica with an iron–phenanthroline complex. The tube-type Fe–N/C exhibited a larger surface area and active site density than the rod-type Fe–N/C. Unexpectedly, the rod-type Fe–N/C showed superior ORR activity to the tube-type Fe–N/C, with a smaller overpotential, greater turnover frequency (TOF), and lower Tafel slope. Temperature-programmed desorption studies revealed a weaker binding strength of the rod-type Fe–N/C with O2. The rod-type Fe–N/C consisting of multiple carbon layers is likely to activate O2 in the interlayer between the Fe–Nx-containing carbon layers, reminiscent of the enzymatic catalyst, whereas in the tube-type Fe–N/C with 3–4 carbon layers, O2 is mostly activated at a single Fe center on the external carbon layer. As a result, the TOF of the rod-type Fe–N/C exceeded those of reported catalysts. We envisage that our work can provide a new insight into the design of highly active Fe–N/C catalysts. | - |
dc.language | English | - |
dc.publisher | Royal Society of Chemistry (RSC) | - |
dc.relation.isPartOf | EES Catalysis | - |
dc.title | Fe–N/C catalysts with tunable mesoporous structures and carbon layer numbers reveal the role of interlayer O2 activation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1039/d2ey00055e | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | EES Catalysis, v.1, no.1, pp.62 - 73 | - |
dc.citation.endPage | 73 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 62 | - |
dc.citation.title | EES Catalysis | - |
dc.citation.volume | 1 | - |
dc.contributor.affiliatedAuthor | Choi, Chang Hyuck | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | other | - |
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