Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Lee, Ha-Young | - |
dc.contributor.author | Yu, Ted H. | - |
dc.contributor.author | Shin, Cheol-Hwan | - |
dc.contributor.author | Fortunelli, A. | - |
dc.contributor.author | Ji, Sang Gu | - |
dc.contributor.author | Kim, Yujin | - |
dc.contributor.author | Kang, Tong-Hyun | - |
dc.contributor.author | Lee, Byong-June | - |
dc.contributor.author | Merinov, Boris V. | - |
dc.contributor.author | Goddard, William A. III | - |
dc.contributor.author | Choi, Chang Hyuck | - |
dc.contributor.author | Yu, Jong-Sung | - |
dc.date.accessioned | 2023-01-11T22:10:15Z | - |
dc.date.available | 2023-01-11T22:10:15Z | - |
dc.date.created | 2022-12-12 | - |
dc.date.issued | 2023-04 | - |
dc.identifier.issn | 0926-3373 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/17413 | - |
dc.description.abstract | For polymer electrolyte membrane fuel cells (PEMFCs), the state-of-the-art electrocatalysts are based on carbon-supported Pt group metals. However, current carbon supports suffer from carbon corrosion during repeated start-stop operations, causing performance degradation. We report a new strategy to produce highly graphitized carbon with controllable N-doping that uses low-temperature synthesis (650 ℃) from g-C3N4 carbon-nitrogen precursor with pyrolysis using Mg. The high graphiticity is confirmed by high-intensity 2D Raman peak with low ID/IG (0.57), pronounced graphitic XRD planes, and excellent conductivity. Without further post-treatment, this highly graphitized N-doped carbon (HGNC) material combines high pyrrolic-N content with high porosity. Supporting Pt on HGNC exhibits excellent oxygen reduction activity for PEMFC with greatly improved durability as proved by real-time loss measurements of Pt and carbon, the first to surpass the DOE 2025 durability targets for both catalyst and support. The Pt/HGNC-65 shows 32% and 24% drop in mass activity after accelerated durability tests of both electrocatalyst and support, respectively, which are less than DOE target of 40% loss. The atomistic basis for this durability is explained via quantum mechanics-based molecular dynamics simulations. Interestingly, it is found that pyrrolic-N strongly interacts with Pt, making the Pt catalyst more stable during fuel cell reaction. © 2022 Elsevier B.V. | - |
dc.language | English | - |
dc.publisher | Elsevier B.V. | - |
dc.title | Low temperature synthesis of new highly graphitized N-doped carbon for Pt fuel cell supports, satisfying DOE 2025 durability standards for both catalyst and support | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.apcatb.2022.122179 | - |
dc.identifier.wosid | 000890427700002 | - |
dc.identifier.scopusid | 2-s2.0-85142168790 | - |
dc.identifier.bibliographicCitation | Applied Catalysis B: Environmental, v.323 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | Real-time degradation analysis | - |
dc.subject.keywordAuthor | Grand canonical reaction kinetics | - |
dc.subject.keywordAuthor | PEMFCs | - |
dc.subject.keywordAuthor | Graphitized carbon | - |
dc.subject.keywordAuthor | Pyrrolic-N | - |
dc.subject.keywordPlus | NITROGEN | - |
dc.subject.keywordPlus | ELECTROCATALYSTS | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | NITRIDE | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | OPERATION | - |
dc.subject.keywordPlus | GRAPHENE | - |
dc.citation.title | Applied Catalysis B: Environmental | - |
dc.citation.volume | 323 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry; Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Engineering, Environmental; Engineering, Chemical | - |
dc.type.docType | Article | - |
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