دورية أكاديمية
Pt-Co truncated octahedral nanocrystals: a class of highly active and durable catalysts toward oxygen reduction.
| العنوان: | Pt-Co truncated octahedral nanocrystals: a class of highly active and durable catalysts toward oxygen reduction. |
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| المؤلفون: | Shen M; The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA. younan.xia@bme.gatech.edu and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China., Xie M; School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA., Slack J; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA., Waldrop K; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA., Chen Z; The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA. younan.xia@bme.gatech.edu., Lyu Z; School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA., Cao S; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Zhao M; School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA., Chi M; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Pintauro PN; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA., Cao R; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China., Xia Y; The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA. younan.xia@bme.gatech.edu and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA. |
| المصدر: | Nanoscale [Nanoscale] 2020 Jun 04; Vol. 12 (21), pp. 11718-11727. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: RSC Pub Country of Publication: England NLM ID: 101525249 Publication Model: Print Cited Medium: Internet ISSN: 2040-3372 (Electronic) Linking ISSN: 20403364 NLM ISO Abbreviation: Nanoscale Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Original Publication: Cambridge, UK : RSC Pub. |
| مستخلص: | We report a facile and scalable synthesis of Pt-Co truncated octahedral nanocrystals (TONs) by employing Pt(acac)2 and Co(acac)2 as precursors, together with CO molecules and Mn atoms derived from the decomposition of Mn2(CO)10 as a reductant and a {111} facet-directing agent, respectively. Both the composition and yield of the Pt-Co TONs could be varied through the introduction of CHCl3. When tested at 80 °C using membrane electrode assembly (MEA), the 4 nm Pt2.6Co TONs gave a mass activity of 294 A gPt-1 at beginning-of-life (BOL) and it increased to 384 A gPt-1 during recovery cycles. The mass activity at BOL only dropped by 24% after 30 000 voltage cycles at end-of-life (EOL) in a metal dissolution accelerated stress test. The Pt2.6Co/C catalyst outperformed the commercial TKK Pt3Co/C (230 A gPt-1 at BOL and 40% loss after 30 000 cycles at EOL) in terms of both activity and durability. Our systematic analysis suggested that the enhancement in activity can be attributed to the combination of small, uniform size and well-defined {111} facets. This new class of catalysts holds promise for applications in proton-exchange membrane fuel cells. |
| تواريخ الأحداث: | Date Created: 20200528 Latest Revision: 20200604 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1039/d0nr02904a |
| PMID: | 32458949 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 2040-3372 |
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| DOI: | 10.1039/d0nr02904a |