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Nitrogen doping to ...
Nitrogen doping to accelerate the phase transition to ordered intermetallic Pt3Co catalyst for the oxygen reduction reaction in fuel cells
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Xu, Weicheng (författare)
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Zhu, Zhipeng (författare)
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Wang, Yucheng (författare)
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Cui, Peixin (författare)
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Tong, Lei (författare)
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Zhao, Kuangmin (författare)
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- Yuan, Jiayin, 1979- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Zhou, Zhi-You (författare)
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Liang, Hai-Wei (författare)
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Tian, Na (författare)
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Sun, Shi-Gang (författare)
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry (RSC). - 2050-7488 .- 2050-7496. ; 11:8, s. 4078-4087
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Ordered intermetallic Pt–M alloys are foreseen to be promising as next-generation low-Pt catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) due to their high catalytic activity and stability. Nevertheless, the disorder-to-order intermetallic phase transition often needs to proceed at elevated annealing temperature for a long time, which leads to severe particle agglomeration. Herein, an efficient nitrogen (N)-doping strategy is developed to speed up such phase transition in an intermetallic Pt3Co alloy catalyst, which shortens the annealing duration by 3–5 fold at a temperature of 600–800 °C. Such a strategy can not only minimize the particle agglomeration but also effectively optimize the electronic structure of surface Pt atoms with the incorporated N. The prepared N-doped ordered intermetallic Pt3Co catalyst exhibits high ORR activity among the best of the state-of-the-art, with mass activities of 1.21 and 1.20 A mgPt−1 at 0.90 V in rotating disk electrode (RDE) and proton exchange membrane fuel cell (PEMFC) tests, respectively. Moreover, with the total Pt loading of 0.15 mgPt cm−2, the H2–air PEMFC delivers a power density of 1.27 W cm−2 at 150 kPaabs and 0.6 V, corresponding to a high Pt utilization of 0.118 gPt kW−1 that has surpassed the DOE 2025 target (0.125 gPt kW−1). This study paves a new way to develop high-performance low-Pt ORR catalysts for PEMFCs.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
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Xu, Weicheng
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Zhu, Zhipeng
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Wang, Yucheng
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Cui, Peixin
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Tong, Lei
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Zhao, Kuangmin
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visa fler...
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Yuan, Jiayin, 19 ...
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Zhou, Zhi-You
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Liang, Hai-Wei
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Tian, Na
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Sun, Shi-Gang
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
- Artiklar i publikationen
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Journal of Mater ...
- Av lärosätet
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Stockholms universitet