Self-Assembly Intermetallic PtCu3 Core with High-Index Faceted Pt Shell for High-Efficiency Oxygen Reduction
Rational design of well-defined active sites is crucial for promoting sluggish oxygen reduction reactions. Herein, leveraging the surfactant-oriented and solvent-ligand effects, we develop a facile self-assembly strategy to construct a core-shell catalyst comprising a high-index Pt shell encapsulating a PtCu3 intermetallic core with efficient oxygen-reduction performance. Without undergoing a high-temperature route, the ordered PtCu3 is directly fabricated through the accelerated reduction of Cu2+, followed by the deposition of the remaining Pt precursor onto its surface, forming high-index steps oriented by the steric hindrance of surfactant. This approach results in a high half-wave potential of 0.911 V versus reversible hydrogen electrode, with negligible deactivation even after 15000-cycle operation. Operando spectroscopies identify that this core-shell catalyst facilitates the conversion of oxygen-involving intermediates and ensures antidissolution ability. Theoretical investigations rationalize that this improvement is attributed to reinforced electronic interactions around high-index Pt, stabilizing the binding strength of rate-determining OHads species.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:24 |
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| Enthalten in: |
Nano letters - 24(2024), 10 vom: 13. März, Seite 3213-3220 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Xue [VerfasserIn] |
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| Links: |
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| Themen: |
Core−shell structure |
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| Anmerkungen: |
Date Revised 13.03.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acs.nanolett.4c00111 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369167082 |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Rational design of well-defined active sites is crucial for promoting sluggish oxygen reduction reactions. Herein, leveraging the surfactant-oriented and solvent-ligand effects, we develop a facile self-assembly strategy to construct a core-shell catalyst comprising a high-index Pt shell encapsulating a PtCu3 intermetallic core with efficient oxygen-reduction performance. Without undergoing a high-temperature route, the ordered PtCu3 is directly fabricated through the accelerated reduction of Cu2+, followed by the deposition of the remaining Pt precursor onto its surface, forming high-index steps oriented by the steric hindrance of surfactant. This approach results in a high half-wave potential of 0.911 V versus reversible hydrogen electrode, with negligible deactivation even after 15000-cycle operation. Operando spectroscopies identify that this core-shell catalyst facilitates the conversion of oxygen-involving intermediates and ensures antidissolution ability. Theoretical investigations rationalize that this improvement is attributed to reinforced electronic interactions around high-index Pt, stabilizing the binding strength of rate-determining OHads species | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a core−shell structure | |
| 650 | 4 | |a high-index facet | |
| 650 | 4 | |a operando characterizations | |
| 650 | 4 | |a oxygen reduction reaction | |
| 650 | 4 | |a self-assembly strategy | |
| 700 | 1 | |a Liu, Xiaokang |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Dan |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Longfei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Huijuan |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Zhiguo |e verfasserin |4 aut | |
| 700 | 1 | |a Qian, Shiting |e verfasserin |4 aut | |
| 700 | 1 | |a Xia, Zhiyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Luo, Qiquan |e verfasserin |4 aut | |
| 700 | 1 | |a Cao, Linlin |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Jinlong |e verfasserin |4 aut | |
| 700 | 1 | |a Yao, Tao |e verfasserin |4 aut | |
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