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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202206508
|2 doi
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|a pubmed24n1159.xml
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|a (DE-627)NLM347963668
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|a (NLM)36281798
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Xia, Tianyu
|e verfasserin
|4 aut
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|a Mixed-Dimensional Pt-Ni Alloy Polyhedral Nanochains as Bifunctional Electrocatalysts for Direct Methanol Fuel Cells
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 13.01.2023
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|a Date Revised 13.01.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 Wiley-VCH GmbH.
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|a Pt nanocatalysts play a critical role in direct methanol fuel cells (DMFCs) due to their appropriate adsorption/desorption energy, yet suffer from an unbalanced relationship between size-dependent activity and stability. Herein, mixed-dimensional Pt-Ni alloy polyhedral nanochains (Pt-Ni PNCs) with an ordered assembly of a nanopolyhedra-nanowire-nanopolyhedra architecture are fabricated as bifunctional electrocatalysts for DMFCs, effectively alleviating the size effect. The Pt-Ni PNCs exhibit 7.23 times higher mass activity for the anodic methanol oxidation reaction (MOR) than that of commercial Pt/C. In situ Fourier transform infrared spectroscopy and CO stripping measurements demonstrate the prominent stability of the Pt-Ni PNCs to resist CO poisoning. For the cathodic oxygen reduction reaction (ORR), a positive half-wave potential exceeding Pt/C is achieved by the Pt-Ni PNCs, and it can be well maintained for 10 000 cycles with negligible activity decay. The designed nanostructure can alleviate the agglomeration and dissolution problems of 0D small-sized Pt-Ni alloy nanocrystals and enrich surface atom steps and active facets of 1D chain-like nanostructures. This work provides a proposed strategy to improve the catalytic performance of Pt-based nanocatalysts by constructing novel interfacial relationships in mixed dimensions to alleviate the imbalance between catalytic activity and catalytic stability caused by size effects
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|a Journal Article
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|a Pt-Ni alloy electrocatalysts
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|a methanol oxidation
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|a mixed-dimensional materials
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|a oxygen reduction
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|a polyhedral nanochains
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|a Zhao, Kai
|e verfasserin
|4 aut
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|a Zhu, Youqi
|e verfasserin
|4 aut
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|a Bai, Xiaoyan
|e verfasserin
|4 aut
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|a Gao, Han
|e verfasserin
|4 aut
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|a Wang, Ziyu
|e verfasserin
|4 aut
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|a Gong, Yue
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Feng, Menglin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Shunfang
|e verfasserin
|4 aut
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1 |
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|a Zheng, Qiang
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Shouguo
|e verfasserin
|4 aut
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1 |
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|a Wang, Rongming
|e verfasserin
|4 aut
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|a Guo, Haizhong
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 2 vom: 30. Jan., Seite e2206508
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:35
|g year:2023
|g number:2
|g day:30
|g month:01
|g pages:e2206508
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|u http://dx.doi.org/10.1002/adma.202206508
|3 Volltext
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