Uncovering Structural Evolution during the Dealloying Process in Pt-Based Oxygen-Reduction Catalyst
The comprehensive understanding toward the dealloying process is crucial for designing alloy catalysts employed in the oxygen reduction reaction (ORR). However, the specific leaching procedure and subsequent reconstruction of the dealloyed catalyst still remain unclear. Herein, we employ in situ X-ray absorption fine structure spectroscopy to monitor the dealloying process of a two-dimensional PtTe ordered alloy, known for its enhanced ORR activity. Our findings reveal the unsynchronous evolutions of Pt and Te sites, wherein the Pt component undergoes a structural transformation prior to the complete leaching of Te, leading to the formation of a defect-rich Pt catalyst. This dealloyed catalyst exhibits a significant enhancement in ORR activity, featuring a half-wave potential of 0.90 V versus the reversible hydrogen electrode and a mass activity of 0.62 A mgPt-1, outperforming the performance of commercial Pt/C counterpart. This in-depth understanding of the dealloying mechanism enriches our knowledge for the development of high-performance Pt-based alloy catalysts.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:15 |
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| Enthalten in: |
The journal of physical chemistry letters - 15(2024), 11 vom: 21. März, Seite 3071-3077 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Huijuan [VerfasserIn] |
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| Anmerkungen: |
Date Revised 21.03.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acs.jpclett.4c00260 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369565401 |
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| 100 | 1 | |a Zhang, Huijuan |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Uncovering Structural Evolution during the Dealloying Process in Pt-Based Oxygen-Reduction Catalyst |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a The comprehensive understanding toward the dealloying process is crucial for designing alloy catalysts employed in the oxygen reduction reaction (ORR). However, the specific leaching procedure and subsequent reconstruction of the dealloyed catalyst still remain unclear. Herein, we employ in situ X-ray absorption fine structure spectroscopy to monitor the dealloying process of a two-dimensional PtTe ordered alloy, known for its enhanced ORR activity. Our findings reveal the unsynchronous evolutions of Pt and Te sites, wherein the Pt component undergoes a structural transformation prior to the complete leaching of Te, leading to the formation of a defect-rich Pt catalyst. This dealloyed catalyst exhibits a significant enhancement in ORR activity, featuring a half-wave potential of 0.90 V versus the reversible hydrogen electrode and a mass activity of 0.62 A mgPt-1, outperforming the performance of commercial Pt/C counterpart. This in-depth understanding of the dealloying mechanism enriches our knowledge for the development of high-performance Pt-based alloy catalysts | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Tan, Minyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Longfei |e verfasserin |4 aut | |
| 700 | 1 | |a Gui, Renjie |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Xiaokang |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Xue |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Zhiguo |e verfasserin |4 aut | |
| 700 | 1 | |a Cao, Linlin |e verfasserin |4 aut | |
| 700 | 1 | |a Yao, Tao |e verfasserin |4 aut | |
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